CN114033351A

CN114033351A - Method and device for evaluating well

Info

Publication number: CN114033351A
Application number: CN202010705358.XA
Authority: CN
Inventors: 庹维志; 刘举; 易俊; 滕起; 袁泽波; 陈庆; 王方智; 王双阳; 蒋天洪; 刘己全; 李剑; 范文同; 谭良柏; 贺湘辉; 鲁慧; 任登峰; 鲜波; 张晨; 李二鹏; 王一单
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2022-02-11

Abstract

The present application provides a method and device for evaluating a machine-producing well. The method includes: acquiring single-well data of a current time unit of a machine-producing well, and the single-well data includes: the average daily fluid production, dynamic liquid level depth, output of the current time unit Water density, crude oil density, pump hanging depth, middle depth of reservoir, crude oil water content, casing pressure; according to the current time unit dynamic liquid level depth, produced water density, crude oil density, pump hanging depth, middle depth of oil reservoir, The water content of crude oil and casing pressure are used to determine the bottom hole flow pressure of the current time unit of the machined production well. Obtain the production status of the machine-producing well, which includes formation pressure and reservoir fluid production capacity. The method of the present application can more accurately judge the variation of the formation pressure and the fluid production capacity of the oil layer in the production well.

Description

Mechanical production well evaluation method and device

Technical Field

The application relates to the field of oil extraction engineering, in particular to an oil-pumping well evaluation method and device.

Background

The production capacity of the oil field oil mechanical production well can change along with the change of the production condition, and the evaluation of the production condition of the mechanical production well is an important means for ensuring that the oil well is in a high-efficiency production state in real time.

Currently, the most common methods for evaluating the production condition of a mechanical production well are: through the current card analysis production situation, the current situation of change that the current card recorded can directly reflect the operating condition of electric submersible pump, for example: the electric pump well can identify the bad working conditions of electric pump underload, electric pump overload, impurity contained in a shaft and the like through the analysis of the current card; the production condition is analyzed through an indicator diagram, and the indicator diagram shows the relationship between the horsehead suspension point load of the pumping well and the displacement of the polished rod, such as: the pumping well can identify whether the oil well pump is influenced by stratum sand production or not, and the pumping rod is subjected to paraffin deposition and other adverse conditions through the indicator diagram analysis.

The above modes can judge whether the mechanical production process of the mechanical production well is normal or not, and cannot judge the change condition of the formation pressure and the liquid production capacity of the oil layer of the mechanical production well.

Disclosure of Invention

The application provides an oil-pumping well evaluation method and device, which are used for solving the problems that the change condition of the formation pressure of an oil-pumping well and the liquid production capacity of an oil layer cannot be judged.

In a first aspect, the present application provides a method for evaluating an oil recovery well, comprising:

obtaining single well data of a current time unit of a mechanical production well, wherein the single well data comprises: average daily liquid yield, working fluid level depth, produced water density, crude oil density, pumping depth, oil reservoir middle depth, crude oil water content and casing pressure of the current time unit;

determining the bottom hole flowing pressure of the current time unit of the mechanical production well according to the working fluid level depth, the produced water density, the crude oil density, the pumping depth, the oil reservoir middle depth, the crude oil water content and the casing pressure of the current time unit;

and obtaining the production condition of the mechanical production well according to the average daily liquid production and the bottom hole flow pressure of the current time unit and the average daily liquid production and the bottom hole flow pressure of a plurality of historical time units, wherein the production condition comprises the formation pressure and the oil layer liquid production capacity.

Optionally, determining the bottom hole flowing pressure of the current time unit of the mechanical production well according to the working fluid level depth, the produced water density, the crude oil density, the pumping depth, the middle depth of an oil reservoir, the crude oil water content and the casing pressure of the current time unit, and the determining comprises:

obtaining the liquid column pressure of the current time unit of the mechanical production well according to the working fluid level depth, the produced water density, the crude oil density, the pumping depth, the oil reservoir middle depth and the crude oil water content of the current time unit;

obtaining the gas column pressure of the current time unit of the mechanical production well according to the working fluid level depth and the casing pressure of the current time unit;

and obtaining the bottom hole flowing pressure according to the liquid column pressure, the gas column pressure and the casing pressure.

Optionally, obtaining the liquid column pressure of the current time unit of the mechanical production well according to the working fluid level depth, the output water density, the crude oil density, the pumping depth, the oil reservoir middle depth and the crude oil water content of the current time unit, and the method includes:

obtaining the liquid column pressure of the current time unit of the mechanical production well according to the following formula I;

P_L＝ρ_og(h_p-h_f)+(ρ_o(1-f_w)+ρ_Wf_w)g(h_s-h_p) Formula one

Wherein, P_LDenotes the liquid column pressure, h_fIndicating the depth of the working fluid, p_WRepresenting the density of produced water, ρ_oDenotes crude oil density, h_pIndicating the pump hanging depth, h_sIndicating depth in the reservoir, f_wThe water content of the crude oil is shown.

Optionally, obtaining the gas column pressure of the mechanical production well in the current time unit according to the working fluid level depth and the casing pressure in the current time unit includes:

obtaining the gas column pressure of the current time unit of the mechanical production well according to the following formula II;

P_g＝(P_c+0.1)h_f/12500 formula two

Wherein, P_gDenotes the gas column pressure, P_cIndicates the sleeve pressure, h_fIndicating the meniscus depth.

Optionally, the obtaining a production condition of the mechanical production well according to the average daily fluid production and the bottom-hole flow pressure of the current time unit and the average daily fluid production and the bottom-hole flow pressure of a plurality of historical time units, where the production condition includes formation pressure and fluid production capacity of a reservoir, includes:

determining the change condition of the bottom hole flow pressure along with the change of the average daily liquid yield and the bottom hole flow pressure according to the average daily liquid yield and the bottom hole flow pressure of the current time unit and the average daily liquid yield and the bottom hole flow pressure of a plurality of historical time units;

if the bottom hole fluid production pressure is reduced along with the increase of the average daily fluid production quantity, the average daily fluid production quantity of the current time unit is at a low level in the average daily fluid production quantities of a plurality of historical time units, and the bottom hole fluid production pressure of the current time unit is at a high level in the bottom hole fluid production quantities of the plurality of historical time units, determining that the fluid production capacity of the oil reservoir of the mechanical production well does not reach the standard and the variation amplitude of the formation pressure is smaller than the preset amplitude;

if the bottom hole fluid production pressure is reduced along with the increase of the average daily fluid production quantity, the average daily fluid production quantity of the current time unit is at a high level in the average daily fluid production quantities of a plurality of historical time units, and the bottom hole fluid production pressure of the current time unit is at a low level in the bottom hole fluid production quantities of the plurality of historical time units, determining that the oil layer fluid production capacity of the mechanical production well reaches the standard and the variation amplitude of the formation pressure is smaller than the preset amplitude;

if the bottom hole flow pressure is basically unchanged along with the change of the average daily liquid production amount, and the average daily liquid production amount of the current time unit is at a low level in the average daily liquid production amounts of a plurality of historical time units, determining that the oil layer liquid production capacity of the mechanical oil production well does not reach the standard and the formation pressure is in a descending trend;

if the bottom hole flow pressure is basically unchanged along with the change of the average daily fluid production amount, and the average daily fluid production amount of the current time unit is at a high level in the average daily fluid production amounts of a plurality of historical time units, determining that the fluid production capacity of the oil reservoir of the mechanical production well reaches the standard and the formation pressure is in an ascending trend;

if the bottom hole fluid production pressure is increased along with the increase of the average daily fluid production quantity, the average daily fluid production quantity of the current time unit is at a low level in the average daily fluid production quantities of a plurality of historical time units, and the bottom hole fluid production pressure of the current time unit is at a low level in the bottom hole fluid production pressures of the historical time units, determining that the fluid production capacity of the oil production well does not reach the standard and the formation pressure is in a descending trend;

if the bottom hole fluid production pressure is increased along with the increase of the average daily fluid production quantity, the average daily fluid production quantity of the current time unit is at a high level in the average daily fluid production quantities of a plurality of historical time units, and the bottom hole fluid production pressure of the current time unit is at a high level in the bottom hole fluid production pressures of a plurality of historical time units, determining that the fluid production capacity of the oil production well reaches the standard and the formation pressure is in an ascending trend;

and if the fluctuation of the bottom hole flow pressure and the average daily fluid production amount is smaller than a preset range, determining that the fluid production capacity of the oil reservoir of the mechanical production well reaches the standard and the variation amplitude of the formation pressure is smaller than a preset amplitude.

Optionally, the method further includes:

if the oil layer fluid production capacity of the mechanical production well does not reach the standard, increasing the frequency of an electric pump motor of the mechanical production well;

and if the stratum pressure of the mechanical production well is in a descending trend, increasing the water injection rate of a water injection well of the mechanical production well.

Optionally, the plurality of historical time units are a plurality of consecutive historical time units adjacent to the current time unit.

In a second aspect, the present application provides an pumped well evaluation device comprising:

the acquisition module is used for acquiring single-well data of the current time unit of the mechanical production well, and the single-well data comprises: average daily liquid yield, working fluid level depth, produced water density, crude oil density, pumping depth, oil reservoir middle depth, crude oil water content and casing pressure of the current time unit;

the determining module is used for determining the bottom hole flowing pressure of the current time unit of the mechanical production well according to the working fluid level depth, the produced water density, the crude oil density, the pumping depth, the oil reservoir middle depth, the crude oil water content and the casing pressure of the current time unit;

and the processing module is used for obtaining the production condition of the mechanical production well according to the average daily liquid production and the bottom hole flowing pressure of the current time unit and the average daily liquid production and the bottom hole flowing pressure of a plurality of historical time units, wherein the production condition comprises the formation pressure and the oil layer liquid production capacity.

Optionally, the determining module is specifically configured to:

P_L＝ρ_og(h_p-h_f)+(ρ_o(1-f_w)+ρ_Wf_w)g(h_s-h_p) Formula one

Optionally, the determining module is specifically configured to:

P_g＝(P_c+0.1)h_f/12500 formula two

Optionally, the processing module is specifically configured to:

Optionally, the processing module is further configured to:

In a third aspect, the present application provides an pumped well evaluation device comprising: a memory and a processor;

the memory is to store program instructions;

the processor is configured to invoke program instructions in the memory to perform a method of mechanical well evaluation as described in the first aspect of the present application.

In a fourth aspect, the present application provides a computer readable storage medium having computer program instructions stored therein which, when executed, implement a method of mechanical well evaluation according to the first aspect of the present application.

The application provides a method and a device for evaluating a mechanical production well, by acquiring single well data of a current time unit of the mechanical production well, the single well data comprises: the average daily liquid yield, the working fluid level depth, the output water density, the crude oil density, the pumping depth, the oil reservoir middle depth, the crude oil water content and the casing pressure of the current time unit are determined according to the working fluid level depth, the output water density, the crude oil density, the pumping depth, the oil reservoir middle depth, the crude oil water content and the casing pressure of the current time unit, the bottom hole flow pressure of the current time unit of the mechanical production well is determined, the production condition of the mechanical production well is obtained according to the average daily liquid yield and the bottom hole flow pressure of the current time unit and the average daily liquid yield and the bottom hole flow pressure of a plurality of historical time units, the production condition comprises the stratum pressure and the oil layer liquid production capacity, the production condition of the mechanical production well of the current time unit is obtained by the above mode, the change trends of the stratum pressure and the oil layer liquid production capacity of the mechanical production block can be more accurately judged according to the production condition of the mechanical production well of the current time unit, and the formation pressure and the oil layer liquid production capacity of the mechanical oil production block are more accurately evaluated, and then corresponding measures are adopted to improve the average daily liquid production of the mechanical oil production well, so that the oil production of the mechanical oil production well is improved, and the improvement of the oil field development benefit is finally realized.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic representation of a downhole string of a pumped production well provided in accordance with an embodiment of the present application;

FIG. 2 is a flow chart of a method of evaluating a pumped well provided by an embodiment of the present application;

FIG. 3 is a flow chart of a method for evaluating a pumped well provided in accordance with another embodiment of the present application;

FIG. 4 is a 1# pumped well evaluation chart provided by an embodiment of the present application;

FIG. 5 is a 2# pumped well evaluation chart provided by an embodiment of the present application;

FIG. 6 is a 3# pumped well evaluation chart provided by an embodiment of the present application;

FIG. 7 is a 4# pumped well evaluation chart provided by an embodiment of the present application;

fig. 8 is a schematic structural diagram of a pumped well evaluation apparatus according to an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of a configuration of a pumped well evaluation apparatus according to another embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a mechanical production well evaluation device according to another embodiment of the present disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Fig. 1 is a schematic diagram of a downhole string of a pumped well, which may also be referred to as a mechanical production well, according to an embodiment of the present disclosure, and a rod pumped well is one type of pumped well, where the rod pumped well is illustrated in fig. 1 as an example. As shown in fig. 1, the working fluid level depth of the rod-pumped well is the distance from the working fluid level of the rod-pumped well to the wellhead, the pumping depth is the depth from the oil-well pump of the rod-pumped well to the wellhead, the liquid in the well bore of the rod-pumped well contains crude oil and formation water, pure oil is above the pumping depth due to the difference of gravity, oil-water mixed liquid is below the pumping depth corresponding to the pressure of the oil column in fig. 1, oil-water mixed liquid is corresponding to the pressure of the mixed liquid in fig. 1, the middle part of the oil layer corresponds to the depth in the oil reservoir, and the elastic hole is a passage for crude oil to enter the casing.

The production capacity of the oil field oil mechanical production well can change along with the change of the production condition, and the evaluation of the production condition of the mechanical production well is an important means for ensuring that the oil well is in a high-efficiency production state in real time. As shown in fig. 1, the pumping unit drives the pumping rod and the piston to reciprocate up and down in the pumping pipe, so as to pump crude oil to the ground, the pumping unit analyzes the production status through the indicator diagram in the prior art, and the indicator diagram shows the relationship between the mule head suspension point load of the pumping unit and the displacement of the polish rod, such as: the pumping well can identify whether the oil well pump is influenced by stratum sand production or not, and the pumping rod is subjected to paraffin deposition and other adverse conditions through the indicator diagram analysis. The mode can judge whether the mechanical production process of the mechanical production well is normal or not, and cannot judge the change condition of the formation pressure and the liquid production capacity of the oil layer of the mechanical production well.

The application provides an oil-pumping well evaluation method and device, which are used for obtaining single well data of a current time unit of an oil-pumping well, wherein the single well data comprises: average daily liquid yield, working fluid level depth, produced water density, crude oil density, pumping depth, oil reservoir middle depth, crude oil water content and casing pressure of the current time unit; determining the bottom hole flowing pressure of the current time unit of the mechanical production well according to the working fluid level depth, the produced water density, the crude oil density, the pumping depth, the oil reservoir middle depth, the crude oil water content and the casing pressure of the current time unit; and obtaining the production condition of the mechanical production well according to the average daily liquid production and the bottom hole flowing pressure of the current time unit and the average daily liquid production and the bottom hole flowing pressure of a plurality of historical time units, wherein the production condition comprises the formation pressure and the oil layer liquid production capacity. By the method, the change condition of the stratum pressure and the oil layer liquid production capacity of the mechanical oil production well can be judged, the stratum pressure and the oil layer liquid production capacity of the mechanical oil production block are more accurately evaluated, and then corresponding measures are adopted to improve the average daily liquid production of the mechanical oil production well, so that the oil production of the mechanical oil production well is improved, and the promotion of the oil field development benefit is finally realized.

Fig. 2 is a flowchart of a mechanical production well evaluation method according to an embodiment of the present disclosure, where the method according to the embodiment may be applied to an electronic device, where the electronic device may be a terminal device, a server, and the like, and the terminal device may be a mobile phone, a tablet computer, a notebook computer, a desktop computer, and the like. As shown in fig. 2, the method of the present embodiment includes:

s201, obtaining single well data of the current time unit of the mechanical production well, wherein the single well data comprise: average daily liquid yield, working fluid level depth, produced water density, crude oil density, pumping depth, oil reservoir middle depth, crude oil water content and casing pressure of the current time unit.

In this embodiment, single well data of a current time unit of the mechanical production well is obtained, where an average daily liquid yield of the current time unit is an average of all daily liquid yields in the current time unit of the mechanical production well, the liquid yield is a sum of oil yield and water yield, a working fluid level depth is a distance from a working fluid level of the mechanical production well to a wellhead, a produced water density is a density of water in a produced liquid of the mechanical production well, a crude oil density is a density of crude oil in the produced liquid of the mechanical production well, a pump hanging depth is a depth from the wellhead of the mechanical production well to an oil pump, a middle depth is an average of a top boundary depth and a bottom boundary depth of the mechanical production well, a crude oil water content is a ratio of the daily liquid yield of the mechanical production well to the daily liquid yield, and a casing pressure is a pressure between an oil pipe of the mechanical production well and a casing.

The single-well data of the current time unit of the mechanical production well can be input by a user to the electronic device executing the embodiment of the method, or sent by other devices to the electronic device executing the embodiment of the method.

S202, determining the bottom hole flowing pressure of the current time unit of the mechanical production well according to the working fluid level depth, the produced water density, the crude oil density, the pumping depth, the oil reservoir middle depth, the crude oil water content and the casing pressure of the current time unit.

In this embodiment, the bottom hole flowing pressure of the current time unit of the mechanical production well is related to the working fluid level depth, the produced water density, the crude oil density, the pumping depth, the middle depth of the oil reservoir, the crude oil water content and the casing pressure of the current time unit. And determining the bottom hole flowing pressure of the current time unit of the mechanical production well based on the working fluid level depth, the produced water density, the crude oil density, the pumping depth, the oil reservoir middle depth, the crude oil water content and the casing pressure of the current time unit.

S203, obtaining the production condition of the mechanical production well according to the average daily liquid production and the bottom hole flowing pressure of the current time unit and the average daily liquid production and the bottom hole flowing pressure of a plurality of historical time units, wherein the production condition comprises the formation pressure and the oil layer liquid production capacity.

In this embodiment, the average daily fluid production and the bottom-hole flowing pressure of a plurality of historical time units are used as references, and the production condition of the mechanical production well is obtained according to the average daily fluid production and the bottom-hole flowing pressure of the current time unit, wherein the production condition includes the formation pressure and the fluid production capacity of the oil layer. For example: and judging the change condition of the formation pressure and the oil layer fluid production capacity according to the change condition of the average daily fluid production and the change condition of the bottom hole fluid pressure.

Optionally, the time element may be a month, the current time element is the current month, and the plurality of historical time elements are a plurality of months consecutive before the current month. The plurality of historical time units may be 19 consecutive months before the current month, and it should be noted that this embodiment is not limited to 19 months, and may also be more than 19 months. Therefore, the embodiment can obtain the production condition of the mechanical production well according to the average daily liquid production and the bottom hole flowing pressure of each month in 20 continuous months.

According to the mechanical production well evaluation method provided by the embodiment, single well data of the current time unit of the mechanical production well is obtained, and the single well data comprises the following steps: the average daily liquid yield, the working fluid level depth, the output water density, the crude oil density, the pumping depth, the oil reservoir middle depth, the crude oil water content and the casing pressure of the current time unit are determined according to the working fluid level depth, the output water density, the crude oil density, the pumping depth, the oil reservoir middle depth, the crude oil water content and the casing pressure of the current time unit, the bottom hole flow pressure of the current time unit of the mechanical production well is determined, the production condition of the mechanical production well is obtained according to the average daily liquid yield and the bottom hole flow pressure of the current time unit and the average daily liquid yield and the bottom hole flow pressure of a plurality of historical time units, the production condition comprises the stratum pressure and the oil layer liquid production capacity, the production condition of the mechanical production well of the current time unit is obtained by the above mode, the change trends of the stratum pressure and the oil layer liquid production capacity of the mechanical production block can be more accurately judged according to the production condition of the mechanical production well of the current time unit, and the formation pressure and the oil layer liquid production capacity of the mechanical oil production block are more accurately evaluated, and then corresponding measures are adopted to improve the average daily liquid production of the mechanical oil production well, so that the oil production of the mechanical oil production well is improved, and the improvement of the oil field development benefit is finally realized.

Based on the embodiment shown in fig. 2, in some embodiments, fig. 3 is a flowchart of a pumped well evaluation method provided in another embodiment of the present application, and as shown in fig. 3, the method of this embodiment may include:

s301, obtaining single well data of the current time unit of the mechanical production well, wherein the single well data comprise: average daily liquid yield, working fluid level depth, produced water density, crude oil density, pumping depth, oil reservoir middle depth, crude oil water content and casing pressure of the current time unit.

In this embodiment, the specific implementation process of S301 may refer to the related description of the embodiment shown in fig. 2, and is not described herein again.

S302, obtaining the liquid column pressure of the current time unit of the mechanical production well according to the working fluid level depth, the produced water density, the crude oil density, the pumping depth, the oil reservoir middle depth and the crude oil water content of the current time unit.

In this embodiment, the liquid column pressure of the current time unit of the mechanical production well is the liquid column pressure in the shaft, and is related to the working fluid level depth, the produced water density, the crude oil density, the pump hanging depth, the oil reservoir middle depth and the crude oil water content of the current time unit. Therefore, in the embodiment, the liquid column pressure of the mechanical production well in the current time unit is obtained according to the working fluid level depth, the produced water density, the crude oil density, the pumping depth, the oil reservoir middle depth and the crude oil water content of the current time unit.

Optionally, in this embodiment, the liquid column pressure of the mechanical production well in the current time unit may be obtained according to the following formula one;

P_L＝ρ_og(h_p-h_f)+(ρ_o(1-f_w)+ρ_Wf_w)g(h_s-h_p) Formula one

Wherein, P_LDenotes the liquid column pressure in Mpa, h_fRepresents the depth of the working fluid surface in m, rho_WRepresenting the density of the produced water in g/cm³，ρ_oRepresents the crude oil density in g/cm³，h_pIndicating the pump hanging depth in m, h_sRepresenting depth in the reservoir in m, f_wThe water content of the crude oil is expressed in%.

For example: working fluid level depth h of one motor-pumped production well for one month_f1085m, produced water density ρ_WIs 1.1875g/cm³Crude oil density ρ_oIs 0.8674g/cm³Depth h of pump suspension_p2499m, deep in the reservoir h_s5055m, water content of crude oil f_w90.06%, the fluid column pressure of the well was 37.07Mpa during that month.

And S303, obtaining the gas column pressure of the current time unit of the mechanical production well according to the working fluid level depth and the sleeve pressure of the current time unit.

In this embodiment, the gas column pressure of the current time unit of the mechanical production well is the gas column pressure at the upper part of the working fluid level, and is related to the working fluid level depth and the casing pressure of the current time unit. Therefore, according to the working fluid level depth and the casing pressure of the current time unit, the gas column pressure of the current time unit of the mechanical production well is obtained

Optionally, in this embodiment, the gas column pressure of the current time unit of the mechanical production well is obtained according to the following formula two;

P_g＝(P_c+0.1)h_f/12500 formula two

Wherein, P_gRepresents the gas column pressure in Mpa，P_cDenotes the jacket pressure in Mpa, h_fRepresents the depth of the dynamic liquid surface in m.

For example: one month casing pressure P of one motor-pumped production well_c0.57Mpa, working fluid level depth h_f1085m, and the gas column pressure of the mechanical production well in the month is 0.058Mpa through the formula two.

And S304, obtaining bottom hole flowing pressure according to the liquid column pressure, the gas column pressure and the casing pressure.

In this embodiment, the bottom hole flow pressure is obtained from the liquid column pressure, the gas column pressure, and the casing pressure. Alternatively, the sum of the liquid column pressure, gas column pressure, casing pressure may be obtained, and then the bottom hole flow pressure may be obtained from the sum. Optionally, the bottom hole flow pressure is equal to the sum of the liquid column pressure in the wellbore, the gas column pressure above the working fluid level, and the casing pressure. Namely:

P_wf＝P_L+P_g+P_c

wherein P is_wfIndicating the bottom hole flow pressure.

S305, obtaining the production condition of the mechanical production well according to the average daily liquid production and the bottom hole flowing pressure of the current time unit and the average daily liquid production and the bottom hole flowing pressure of a plurality of historical time units, wherein the production condition comprises the formation pressure and the oil layer liquid production capacity.

In this embodiment, the change condition of the bottom hole flow pressure along with the change of the average daily liquid production amount is determined according to the average daily liquid production amount and the bottom hole flow pressure of the current time unit and the average daily liquid production amount and the bottom hole flow pressure of the plurality of historical time units.

And if the bottom hole fluid production pressure is reduced along with the increase of the average daily fluid production amount, the average daily fluid production amount of the current time unit is at a low level in the average daily fluid production amounts of the plurality of historical time units, and the bottom hole fluid production pressure of the current time unit is at a high level in the bottom hole fluid production amounts of the plurality of historical time units, determining that the oil layer fluid production capacity of the motor-pumped production well does not reach the standard and the variation amplitude of the formation pressure is smaller than the preset amplitude.

Specifically, the fact that the average daily liquid yield of the current time unit is at a low level in the average daily liquid yield of the plurality of historical time units means that the average daily liquid yield value of the current time unit and the average daily liquid yield values of the plurality of historical time units are arranged from large to small, the average daily liquid yield value of the current time unit is at the last two levels of the sorting result, the fact that the average daily liquid yield of the current time unit is at a low level in the average daily liquid yield of the plurality of historical time units means that the average daily liquid yield of the current time unit is at a high level in the average daily liquid yield of the plurality of historical time units if the average daily liquid yield value of the current time unit is at the first two levels of the sorting result.

Specifically, the fact that the bottom hole flowing pressure of the current time unit is at the high position in the bottom hole flowing pressures of the historical time units means that the bottom hole flowing pressure value of the current time unit and the bottom hole flowing pressure values of the historical time units are arranged from large to small, the bottom hole flowing pressure value of the current time unit is located at the first two bits of the sequencing result and represents that the bottom hole flowing pressure of the current time unit is at the high position in the bottom hole flowing pressures of the historical time units, and if the bottom hole flowing pressure value of the current time unit is located at the last two bits of the sequencing result, the bottom hole flowing pressure of the current time unit is at the low position in the bottom hole flowing pressures of the historical time units.

Specifically, the variation amplitude of the formation pressure is smaller than a preset amplitude, and the preset amplitude of the formation pressure is 1 Mpa.

For example: fig. 4 is an evaluation chart of a # 1 mechanical production well according to an embodiment of the present disclosure, and as shown in fig. 4, the evaluation chart of the # 1 mechanical production well takes a month as a time unit, sets an analysis period to be 20 months, and the mechanical production well has no hole-repairing and layer-modifying measure within the last 20 months (within the analysis period), and obtains an average daily fluid production amount and a bottom hole flow pressure of the mechanical production well in the current month according to the single well data of the mechanical production well in the last 20 months, and the average daily fluid production amount and the bottom hole flow pressure of the mechanical production well in the previous 19 months are represented by historical production data points. If the current production data point is on the left side of the historical production data point, such as the current production data point of the # 1 mechanical production well in fig. 4, which indicates that the average daily fluid production of the current month is at a low level in the analysis period, the bottom-hole flow pressure level of the current month is relatively high, the low average daily fluid production of the current month represents that the production pressure difference is low, the production pressure difference is equal to the difference between the formation pressure and the bottom-hole flow pressure, and the variation amplitude of the formation pressure is smaller than a preset amplitude, if the bottom-hole flow pressure of the mechanical production well is reduced, the production pressure difference of the mechanical production well can be increased, so that the fluid production of the mechanical production well is increased, and therefore, the evaluation result of the # 1 mechanical production well in fig. 4 is: the oil layer liquid production capacity does not reach the standard, the variation amplitude of the formation pressure is smaller than the preset amplitude, the potential of further extracting liquid synergy is realized, the liquid production capacity of the mechanical production well can be improved in a mode of increasing the frequency of an electric pump motor of the mechanical production well, and the effect of increasing the yield of crude oil is achieved.

And if the bottom hole fluid production pressure is reduced along with the increase of the average daily fluid production amount, the average daily fluid production amount of the current time unit is at a high level in the average daily fluid production amounts of the plurality of historical time units, and the bottom hole fluid production pressure of the current time unit is at a low level in the bottom hole fluid production amounts of the plurality of historical time units, determining that the oil layer fluid production capacity of the motor-pumped production well reaches the standard and the variation amplitude of the formation pressure is smaller than the preset amplitude.

For example: if the current production data point is on the right side of the historical production data point, the average daily fluid production of the current month of the mechanical production well is shown to be at a high level in the analysis period, the bottom hole flowing pressure level of the current month is relatively low, the average daily fluid production of the current month is high and represents that the production pressure difference is large, the production pressure difference is equal to the difference value between the formation pressure and the bottom hole flowing pressure, the change amplitude of the formation pressure is smaller than a preset amplitude, and if the bottom hole flowing pressure of the mechanical production well is increased, the production pressure difference of the mechanical production well can be reduced, so that the fluid production of the mechanical production well is reduced, therefore, the evaluation result is as follows: the oil layer fluid production ability of motor-pumped production well is up to standard and the range of variation of formation pressure is less than preset range, whether need the current fluid production volume of analysis motor-pumped production well can lead to the notes to adopt unbalanced simultaneously, notes adopt unbalanced promptly: the extraction amount is larger than the water injection amount, the oil field injection-production balance is beneficial to long-term continuous extraction, if the current liquid production amount of the mechanical extraction well can cause the injection-production imbalance, the frequency of an electric pump motor needs to be reduced, so that the liquid production amount of the mechanical extraction well is reduced; and if the current liquid production amount of the mechanical production well cannot cause the imbalance of injection and production, continuously keeping the current production parameters for production.

If the bottom hole flow pressure is basically unchanged along with the change of the average daily liquid production amount and the average daily liquid production amount of the current time unit is at a high level in the average daily liquid production amounts of a plurality of historical time units, determining that the oil layer liquid production capacity of the mechanical oil production well reaches the standard and the formation pressure is in an ascending trend;

for example: fig. 5 is an evaluation chart of a # 2 mechanical production well according to an embodiment of the present disclosure, and as shown in fig. 5, the evaluation chart of the # 2 mechanical production well takes a month as a time unit, sets an analysis period to be 20 months, and the mechanical production well has no hole-repairing and layer-modifying measure within the last 20 months (within the analysis period), and obtains an average daily fluid production amount and a bottom hole flow pressure of the mechanical production well in the current month according to the single well data of the mechanical production well in the last 20 months, and the average daily fluid production amount and the bottom hole flow pressure of the mechanical production well in the previous 19 months are represented by historical production data points. If the current production data point is on the right side of the historical production data point, such as the current production data point of the # 2 mechanical production well in fig. 5, it indicates that the average daily fluid production of the current month of the mechanical production well is at a high level in the analysis period, the average daily fluid production of the current month is high and represents that the production pressure difference is large, the production pressure difference is equal to the difference between the formation pressure and the bottom hole flow pressure, and the bottom hole flow pressure of the current month is basically unchanged, and the production pressure difference is large and represents that the formation pressure is in an ascending trend, therefore, the evaluation result of the # 2 mechanical production well in fig. 5 is: and (4) the liquid production capacity of the oil layer reaches the standard, the formation pressure is in an ascending trend, and the current production parameters are continuously kept for production.

And if the bottom hole flow pressure is basically unchanged along with the change of the average daily liquid production amount and the average daily liquid production amount of the current time unit is at a low level in the average daily liquid production amounts of a plurality of historical time units, determining that the oil layer liquid production capacity of the mechanical production well does not reach the standard and the formation pressure is in a descending trend.

For example: if the current production data point is on the left side of the historical production data point, the average daily liquid production of the current month is in a low level in the analysis period, the average daily liquid production of the current month is low and represents that the production pressure difference is low, the production pressure difference is equal to the difference value between the formation pressure and the bottom hole flowing pressure, the bottom hole flowing pressure of the current month is basically unchanged, the production pressure difference is reduced and represents that the formation pressure is in a descending trend, therefore, the evaluation result is as follows: the oil layer liquid production capacity of the mechanical production well does not reach the standard, the formation pressure is in a descending trend, the water injection amount can be increased for the water injection well corresponding to the mechanical production well, the formation pressure is improved, the injection and production balance is kept, and the continuous long-term exploitation of the oil field is promoted.

If the bottom hole fluid production pressure is increased along with the increase of the average daily fluid production quantity, the average daily fluid production quantity of the current time unit is at a low level in the average daily fluid production quantities of the plurality of historical time units, and the bottom hole fluid production pressure of the current time unit is at a low level in the bottom hole fluid production pressures of the plurality of historical time units, determining that the oil layer fluid production capacity of the mechanical production well does not reach the standard and the formation pressure is in a descending trend;

for example: fig. 6 is an evaluation chart of a 3# mechanical production well according to an embodiment of the present disclosure, as shown in fig. 6, the evaluation chart of the 3# mechanical production well takes a month as a time unit, sets an analysis period to be 20 months, the mechanical production well has no hole-repairing and layer-modifying measure within the last 20 months (within the analysis period), and obtains an average daily fluid production and a bottom hole flow pressure of the mechanical production well in the current month according to the single well data of the mechanical production well in the last 20 months, and the average daily fluid production and the bottom hole flow pressure of the mechanical production well in the previous 19 months are represented by historical production data points. If the current production data point is on the left side of the historical production data point, such as the current production data point of the 3# mechanical production well in fig. 6, it indicates that the average daily fluid production of the current month is at a low level in the analysis period, the bottom hole flow pressure level of the current month is also at a low level, the low average daily fluid production of the current month represents that the production pressure difference is low, the production pressure difference is equal to the difference between the formation pressure and the bottom hole flow pressure, it is determined that both the formation pressure and the bottom hole flow pressure are in a descending trend, and the descending amplitude of the formation pressure is greater than that of the bottom hole flow pressure, therefore, the evaluation result of the 3# mechanical production well in fig. 6 is: the oil layer liquid production capacity does not reach the standard and the formation pressure is in a descending trend, the water injection quantity can be increased for the water injection well corresponding to the mechanical oil extraction well, the formation pressure is improved, the injection and extraction balance is kept, and the continuous long-term exploitation of the oil field is promoted.

If the bottom hole fluid production pressure is increased along with the increase of the average daily fluid production quantity, the average daily fluid production quantity of the current time unit is at a high level in the average daily fluid production quantities of a plurality of historical time units, and the bottom hole fluid production pressure of the current time unit is at a high level in the bottom hole fluid production pressures of the historical time units, determining that the oil layer fluid production capacity of the mechanical production well reaches the standard and the formation pressure is in an ascending trend;

for example: if the current production data point is on the right side of the historical production data point, the average daily fluid production of the current month of the mechanical production well is shown to be at a high level in the analysis period, the bottom hole flowing pressure of the current month is also at a high level, the average daily fluid production of the current month is high and represents that the production pressure difference is large, the production pressure difference is equal to the difference value between the formation pressure and the bottom hole flowing pressure, the formation pressure and the bottom hole flowing pressure are determined to be in an ascending trend, and the ascending amplitude of the formation pressure is larger than that of the bottom hole flowing pressure, therefore, the evaluation result is as follows: the oil layer liquid production capacity of the mechanical production well reaches the standard, the formation pressure is in an ascending trend, the injection and production balance condition of the well region is good, and the current production parameters are continuously kept for production.

And if the fluctuation of the bottom hole flow pressure and the average daily fluid production amount is smaller than the preset range, determining that the fluid production capacity of the oil layer of the mechanical oil production well reaches the standard and the variation amplitude of the formation pressure is smaller than the preset amplitude.

Specifically, the fluctuations of the bottom hole flow pressure and the average daily liquid production amount are both smaller than a preset range, and the preset range is as follows: arranging the bottom hole flow pressure values of the current time unit and the bottom hole flow pressure values of a plurality of historical time units from large to small, wherein the error between the average value of the first 3 values and the average value of all the values is not more than 12%, and the error between the average value of the last 3 values and the average value of all the values is not more than 12%; the average daily liquid yield value of the current time unit and the average daily liquid yield values of a plurality of historical time units are arranged from large to small, the error between the average value of the first 3 values and the average value of all the values is not more than 12%, and the error between the average value of the last 3 values and the average value of all the values is not more than 12%.

For example: fig. 7 is an evaluation chart of a 4# mechanical production well according to an embodiment of the present disclosure, as shown in fig. 7, the 4# mechanical production well evaluation chart takes a month as a time unit, an analysis period is set to 20 months, the mechanical production well has no hole-repairing and layer-modifying measure within the last 20 months (within the analysis period), and an average daily fluid production amount and a bottom hole flow pressure of the current month of the mechanical production well are obtained according to the single well data of the last 20 months of the mechanical production well and are represented by current production data points, and an average daily fluid production amount and a bottom hole flow pressure of the previous 19 months are represented by historical production data points. Fig. 7 shows that the bottom hole flow pressure and monthly average daily fluid production of the 4# mechanical production well have small fluctuation and the production conditions are stable in the analysis period, so the evaluation result is that: the oil layer fluid production capacity of the mechanical production well reaches the standard, the variation amplitude of the formation pressure is smaller than the preset amplitude, the production condition of the mechanical production well is stable, and the current production parameters are continuously kept for production.

According to the mechanical production well evaluation method provided by the embodiment, single well data of the current time unit of the mechanical production well is obtained, and the single well data comprises the following steps: obtaining the average daily fluid yield, the working fluid level depth, the output water density, the crude oil density, the pumping depth, the oil reservoir middle depth, the crude oil water content and the casing pressure of a current time unit, obtaining the gas column pressure of the current time unit of the mechanical production well according to the working fluid level depth, the output water density, the crude oil density, the pumping depth, the oil reservoir middle depth and the crude oil water content of the current time unit, obtaining the bottom hole flowing pressure according to the gas column pressure of the current time unit of the mechanical production well and the casing pressure of the current time unit, obtaining the production condition of the mechanical production well according to the average daily fluid yield and the bottom hole flowing pressure of the current time unit and the average daily fluid yield and the bottom hole flowing pressure of a plurality of historical time units, wherein the production condition comprises the stratum pressure and the oil layer fluid production capacity, and obtaining the production condition of the mechanical production well of the current time unit by the above mode, according to the production condition of the mechanical production well of the current time unit, the change trend of the stratum pressure and the oil layer liquid production capacity of the mechanical production well area can be judged more accurately, the stratum pressure and the oil layer liquid production capacity of the mechanical production area can be evaluated more accurately, and then corresponding measures are adopted, the average daily liquid production capacity of the mechanical production well is improved, so that the oil production of the mechanical production well is improved, and the promotion of the oil field development benefit is finally realized.

The application provides a mechanical production well evaluation method, through the production situation who obtains mechanical production well, the production situation includes formation pressure and oil reservoir liquid production ability, can judge the change trend of mechanical production well block formation pressure and oil reservoir liquid production ability, make more accurate aassessment to the formation pressure and the oil reservoir liquid production ability of mechanical production block, and then adopt corresponding measure, improve the average daily liquid production volume of mechanical production well, thereby improve the oil production volume of mechanical production well, finally realize the promotion of oil field development benefit. For example: the production condition of 19 mechanical producing wells (electric pump wells) of an oil field is evaluated:

the bottom hole flowing pressure of the 2 mechanical producing wells is reduced along with the increase of the daily liquid production amount, the oil layer liquid production capacity of the 2 mechanical producing wells is determined to be not up to standard through evaluation, the mechanical producing wells have the potential of liquid extraction, so that the liquid production amount of the mechanical producing wells is improved in a mode of increasing the motor frequency of the electric pump, and the effect of increasing the yield of crude oil is achieved.

The bottom flowing pressure of the 10 mechanical production wells is basically unchanged along with the change of the average daily liquid yield, and the formation pressure of 3 mechanical production wells is determined to be in a descending trend through evaluation, so that the water injection amount is increased for the water injection wells corresponding to the 3 mechanical production wells, after two months, the formation pressure is increased, the injection-production balance is maintained, and the continuous long-term production of the oil field is promoted; the evaluation determines that the formation pressure of 1 of the mechanical production wells is in a recent rising trend, the effect is proved after the water injection amount is increased to the corresponding water injection well in the early stage of the mechanical production well, and the correctness of the early stage measures is proved.

The bottom hole flowing pressure of the 3 mechanical production wells is increased along with the increase of the average daily liquid production amount, the liquid production capacity of the oil layer of 1 mechanical production well is determined to be not up to standard through evaluation, and the formation pressure is in a descending trend, so that an oil reservoir engineer performs injection and production balance analysis on the mechanical production wells, and considers that the near term water injection amount of the water injection wells corresponding to the mechanical production wells is too low, so that water injection is enhanced for the water injection wells corresponding to the mechanical production wells, and the injection and production balance is kept; the current oil layer liquid production capacity of 1 of the oil extraction wells is determined to be in a high position through evaluation, and the formation pressure is in an ascending trend, so that the effect is proved to be achieved after the water injection amount is increased for the corresponding water injection well in the early stage of the oil extraction well, and the correctness of the early stage measures is proved.

The fluctuation of the bottom hole flow pressure and the average daily liquid production amount of the 4 mechanical production wells is smaller than a preset range, the production conditions of the 4 mechanical production wells are determined to be stable for a long time through evaluation, the existing mechanical production parameter production can be continuously kept, and the production parameters are not required to be adjusted.

On the basis of any of the above embodiments, after obtaining the production condition of the mechanical production well, the production condition of the mechanical production well is output, for example, the production condition of the mechanical production well is displayed, or the production condition of the mechanical production well is sent to a terminal device of a manager. The production conditions of the mechanical production well may include, for example, a graphical representation as shown in any of fig. 4-7.

Fig. 8 is a schematic structural diagram of a mechanical production well evaluation device according to an embodiment of the present disclosure. As shown in fig. 8, the mechanical production well evaluation apparatus 800 of the present embodiment includes: an acquisition module 801, a determination module 802 and a processing module 803.

An obtaining module 801, configured to obtain single well data of a current time unit of a mechanical production well, where the single well data includes: average daily liquid yield, working fluid level depth, produced water density, crude oil density, pumping depth, oil reservoir middle depth, crude oil water content and casing pressure of the current time unit;

a determining module 802, configured to determine a bottom hole flowing pressure of the mechanical production well in the current time unit according to the working fluid level depth, the produced water density, the crude oil density, the pumping depth, the oil reservoir middle depth, the crude oil water content, and the casing pressure of the current time unit;

and the processing module 803 is configured to obtain the production condition of the mechanical production well according to the average daily fluid yield and the bottom-hole flow pressure of the current time unit and the average daily fluid yield and the bottom-hole flow pressure of a plurality of historical time units, where the production condition includes formation pressure and fluid production capacity of an oil reservoir.

The apparatus of this embodiment may be used to implement the technical solution of the method embodiment shown in fig. 2, and the implementation principle and the technical effect are similar, which are not described herein again.

On the basis of the embodiment shown in fig. 8, in some embodiments, the determining module 802 is specifically configured to:

On the basis of any of the embodiments shown above, the determining module 802 is specifically configured to:

P_L＝ρ_og(h_p-h_f)+(ρ_o(1-f_w)+ρ_Wf_w)g(h_s-h_p) Formula one

P_g＝(P_c+0.1)h_f/12500 formula two

On the basis of any one of the above illustrated embodiments, the processing module 803 is specifically configured to:

On the basis of any of the above illustrated embodiments, the processing module 803 is further configured to:

if the oil layer fluid production capacity of the mechanical production well does not reach the standard, increasing the frequency of an electric pump motor of the mechanical production well; and if the stratum pressure of the mechanical production well is in a descending trend, increasing the water injection rate of a water injection well of the mechanical production well.

On the basis of any one of the above-mentioned embodiments, the plurality of historical time units are consecutive historical time units adjacent to the current time unit.

The apparatus of this embodiment may be configured to implement the technical solution of any one of the above-mentioned method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.

Fig. 9 is a schematic structural diagram of a mechanical production well evaluation device according to another embodiment of the present disclosure. As shown in fig. 9, the apparatus 900 of the present embodiment includes: a memory 901 and a processor 902. The processor 901 and the memory 902 are connected by a bus.

The memory 901 is used to store program instructions.

The processor 902 is configured to invoke the program instructions in the memory to perform:

acquiring single-well data of a current time unit of the mechanical production well, wherein the single-well data comprises: average daily liquid yield, working fluid level depth, produced water density, crude oil density, pumping depth, oil reservoir middle depth, crude oil water content and casing pressure of the current time unit; determining the bottom hole flowing pressure of the current time unit of the mechanical production well according to the working fluid level depth, the produced water density, the crude oil density, the pumping depth, the oil reservoir middle depth, the crude oil water content and the casing pressure of the current time unit; and obtaining the production condition of the mechanical production well according to the average daily liquid production and the bottom hole flowing pressure of the current time unit and the average daily liquid production and the bottom hole flowing pressure of a plurality of historical time units, wherein the production condition comprises the formation pressure and the oil layer liquid production capacity.

Optionally, the processor 902 is specifically configured to:

obtaining the liquid column pressure of the current time unit of the mechanical production well according to the working fluid level depth, the produced water density, the crude oil density, the pumping depth, the oil reservoir middle depth and the crude oil water content of the current time unit; obtaining the gas column pressure of the current time unit of the mechanical production well according to the working fluid level depth and the casing pressure of the current time unit; and obtaining the bottom hole flowing pressure according to the liquid column pressure, the gas column pressure and the casing pressure.

Optionally, the processor 902 is specifically configured to:

P_L＝ρ_og(h_p-h_f)+(ρ_o(1-f_w)+ρ_Wf_w)g(h_s-h_p) Formula one

Optionally, the processor 902 is specifically configured to:

P_g＝(P_c+0.1)h_f/12500 formula two

Wherein, P_gDenotes the gas column pressure, P_cIndicates the sleeve pressure, h_fIndicating the dynamic liquid level depth.

Optionally, the processor 902 is specifically configured to:

determining the change condition of the bottom hole flow pressure along with the change of the average daily liquid yield and the bottom hole flow pressure according to the average daily liquid yield and the bottom hole flow pressure of the current time unit and the average daily liquid yield and the bottom hole flow pressure of a plurality of historical time units; if the bottom hole fluid production pressure is reduced along with the increase of the average daily fluid production quantity, the average daily fluid production quantity of the current time unit is at a low level in the average daily fluid production quantities of a plurality of historical time units, and the bottom hole fluid production pressure of the current time unit is at a high level in the bottom hole fluid production quantities of the plurality of historical time units, determining that the fluid production capacity of the oil reservoir of the mechanical production well does not reach the standard and the variation amplitude of the formation pressure is smaller than the preset amplitude; if the bottom hole fluid production pressure is reduced along with the increase of the average daily fluid production quantity, the average daily fluid production quantity of the current time unit is at a high level in the average daily fluid production quantities of a plurality of historical time units, and the bottom hole fluid production pressure of the current time unit is at a low level in the bottom hole fluid production quantities of the plurality of historical time units, determining that the oil layer fluid production capacity of the mechanical production well reaches the standard and the variation amplitude of the formation pressure is smaller than the preset amplitude; if the bottom hole flow pressure is basically unchanged along with the change of the average daily liquid production amount, and the average daily liquid production amount of the current time unit is at a low level in the average daily liquid production amounts of a plurality of historical time units, determining that the oil layer liquid production capacity of the mechanical oil production well does not reach the standard and the formation pressure is in a descending trend; if the bottom hole flow pressure is basically unchanged along with the change of the average daily fluid production amount, and the average daily fluid production amount of the current time unit is at a high level in the average daily fluid production amounts of a plurality of historical time units, determining that the fluid production capacity of the oil reservoir of the mechanical production well reaches the standard and the formation pressure is in an ascending trend; if the bottom hole fluid production pressure is increased along with the increase of the average daily fluid production quantity, the average daily fluid production quantity of the current time unit is at a low level in the average daily fluid production quantities of a plurality of historical time units, and the bottom hole fluid production pressure of the current time unit is at a low level in the bottom hole fluid production pressures of the historical time units, determining that the fluid production capacity of the oil production well does not reach the standard and the formation pressure is in a descending trend; if the bottom hole fluid production pressure is increased along with the increase of the average daily fluid production quantity, the average daily fluid production quantity of the current time unit is at a high level in the average daily fluid production quantities of a plurality of historical time units, and the bottom hole fluid production pressure of the current time unit is at a high level in the bottom hole fluid production pressures of a plurality of historical time units, determining that the fluid production capacity of the oil production well reaches the standard and the formation pressure is in an ascending trend; and if the fluctuation of the bottom hole flow pressure and the average daily fluid production amount is smaller than a preset range, determining that the fluid production capacity of the oil reservoir of the mechanical production well reaches the standard and the variation amplitude of the formation pressure is smaller than a preset amplitude.

On the basis of any of the above illustrated embodiments, the processor 902 is further configured to: if the oil layer fluid production capacity of the mechanical production well does not reach the standard, increasing the frequency of an electric pump motor of the mechanical production well; and if the stratum pressure of the mechanical production well is in a descending trend, increasing the water injection rate of a water injection well of the mechanical production well.

Fig. 10 is a schematic structural diagram of a mechanical production well evaluation device according to another embodiment of the present disclosure, and as shown in fig. 10, for example, the mechanical production well evaluation device 1000 may be provided as a server or a computer. Referring to fig. 10, the pumped well evaluation apparatus 1000 includes a processing component 1001 that further includes one or more processors and memory resources, represented by memory 1002, for storing instructions, such as applications, that are executable by the processing component 1001. The application programs stored in memory 1002 may include one or more modules that each correspond to a set of instructions. Furthermore, the processing component 1001 is configured as program instructions to perform any of the above-described method embodiments.

The pumped well evaluation device 1000 may also include a power module 1003 configured to perform power management of the device 1000, a wired or wireless network interface 1004 configured to connect the device 1000 to a network, and an input/output (I/O) interface 1005. The apparatus 1000 may operate based on an operating system stored in the memory 1002, such as Windows Server, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, or the like.

The present application also provides a computer readable storage medium having computer program instructions stored therein that, when executed by a processor, implement a method, such as an above-mentioned well evaluation.

The computer-readable storage medium may be implemented by any type of volatile or non-volatile memory device or combination thereof, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk. Readable storage media can be any available media that can be accessed by a general purpose or special purpose computer.

An exemplary readable storage medium is coupled to the processor such the processor can read information from, and write information to, the readable storage medium. Of course, the readable storage medium may also be an integral part of the processor. The processor and the readable storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and readable storage medium may also reside as discrete components in the pumped well evaluation apparatus.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An pumped well evaluation method, comprising:

2. The method of claim 1, wherein determining the bottom hole flow pressure of the current time unit of the mechanical production well according to the working fluid level depth, the produced water density, the crude oil density, the pumping depth, the depth in the oil reservoir, the water content of the crude oil and the casing pressure of the current time unit comprises:

3. The method of claim 2, wherein obtaining the fluid column pressure of the current time unit of the mechanical production well according to the working fluid level depth, the produced water density, the crude oil density, the pumping depth, the depth in the oil reservoir and the water content of the crude oil of the current time unit comprises:

P_L＝ρ_og(h_p-h_f)+(ρ_o(1-f_w)+ρ_Wf_w)g(h_s-h_p) Formula one

4. The method of claim 2, wherein obtaining the gas column pressure for the current time unit of the production well from the head depth, the casing pressure for the current time unit comprises:

P_g＝(P_c+0.1)h_f/12500 formula two

5. The method of claim 1, wherein obtaining production conditions for the mechanical production well based on the average daily fluid production and bottom hole flow pressure for the current time unit and the average daily fluid production and bottom hole flow pressure for a plurality of historical time units, the production conditions including formation pressure and fluid production capacity comprises:

6. The method of claim 5, further comprising:

7. The method of any of claims 1-6, wherein the plurality of historical time units is a consecutive plurality of historical time units adjacent to the current time unit.

8. An oil recovery well evaluation device, comprising:

9. An oil recovery well evaluation device, comprising: a memory and a processor;

the memory is to store program instructions;

the processor is configured to invoke program instructions in the memory to perform the method of pumped well evaluation of any of claims 1-7.

10. A computer readable storage medium having computer program instructions stored therein that, when executed, implement a method of mechanical well evaluation according to any of claims 1 to 7.