CN113338882B - Method and system for determining injection quantity of medicament for controlling bottom water of fracture-cavity type oil reservoir separator - Google Patents
Method and system for determining injection quantity of medicament for controlling bottom water of fracture-cavity type oil reservoir separator Download PDFInfo
- Publication number
- CN113338882B CN113338882B CN202010099536.9A CN202010099536A CN113338882B CN 113338882 B CN113338882 B CN 113338882B CN 202010099536 A CN202010099536 A CN 202010099536A CN 113338882 B CN113338882 B CN 113338882B
- Authority
- CN
- China
- Prior art keywords
- partition plate
- water
- oil
- separator
- determining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/40—Controlling or monitoring, e.g. of flood or hurricane; Forecasting, e.g. risk assessment or mapping
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
The invention discloses a method for determining the injection quantity of a medicament for controlling bottom water of a fracture-cavity oil reservoir partition plate, which comprises the following steps: determining the thickness of the partition plate according to the current production pressure difference of the production well and the water drive strength of the partition plate after the agent is glued; monitoring the oil-water interface position, and determining the radius of a round bottom water control baffle which is formed at the interface position by the baffle agent and is limited by the current production well oil reservoir body; determining the effective thickness of a partition plate formed after the partition plate medicament is glued in oil water under a preset temperature threshold value of a high-temperature deep well oil reservoir through an indoor experiment, and obtaining a loss coefficient representing the loss degree of the partition plate medicament from injection to formation of a bottom water partition plate; and obtaining the injection volume of the baffle agent according to the thickness of the baffle, the radius of the baffle and the loss coefficient. The invention overcomes the inefficiency caused by insufficient injection quantity, and also avoids the phenomenon of complete blockage caused by too much injection quantity, so that the oil well oil increasing effect is obvious and the recovery ratio is improved.
Description
Technical Field
The invention relates to the technical field of oil and gas exploitation, in particular to a method and a system for determining the injection quantity of medicament for controlling bottom water of a fracture-cavity type oil reservoir partition plate.
Background
Bottom water coning is an important reason for reducing single well production and recovery of bottom water reservoirs. For a fracture-cavity type bottom water reservoir, the reservoir has larger difference from a pore type and a fractured hydrocarbon reservoir, and holes, cracks and holes in the reservoir coexist, wherein a large-scale ancient karst cavity system is a main reservoir space. Reservoir dimensions vary widely in space, with the reservoir spatial distribution being discontinuous. After the oil and gas well is put into operation, water coning easily occurs in the oil and gas layer due to the influence of gravity difference of the oil, water or gas and water. Along with the increase of oil extraction and gas velocity, the water cone continuously rises to break through and enter the bottom of the well, so that the oil and gas are produced simultaneously, the oil and gas yield is reduced, and the process that the bottom water is pushed along with the oil extraction and gas in a conical longitudinal direction is generated, so that the phenomenon of bottom water coning is very unfavorable for the exploitation of oil reservoirs and gas reservoirs.
The self-spreading partition board water control system is used for treating karst cave type oil reservoir flooding well, a certain amount of partition board system is injected into stratum from oil pipe of oil well, after a period of time, the self-spreading partition board is fully spread into glue between oil-water interface, so that the functions of inhibiting bottom water cone, raising crude oil yield and reducing water content are achieved. Because the medicament system is not dissolved in oil or water, the numerical quantification of the injection amount is critical, and if the injection amount is too large, the oil and water are easily blocked; if the injection amount is small, the water cone is not inhibited, and the water control effect is not achieved.
The partition board in the existing partition board bottom water control technology mainly aims at sandstone oil and gas reservoirs, and a fracture-cavity type oil reservoir cannot judge a water law and an oil-water interface due to the fact that the fracture-cavity structure is complex, so that the existing partition board parameter design method cannot meet the water control requirement of the fracture-cavity type oil reservoir.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for determining the injection quantity of the bottom water of the fracture-cavity type oil reservoir separator, which comprises the following steps: determining the thickness of the partition plate according to the current production pressure difference of the production well and the water drive strength of the partition plate after the agent is glued; monitoring the oil-water interface position, and determining the radius of a round bottom water control baffle which is formed by baffle agent at the interface position and is limited by the current production well oil reservoir body; determining the effective thickness of a partition plate formed after the partition plate medicament is glued in oil water under a preset temperature threshold value of a high-temperature deep well oil reservoir through an indoor experiment, and obtaining a loss coefficient representing the loss degree of the partition plate medicament from injection to formation of a bottom water partition plate; and obtaining the injection volume of the baffle agent according to the thickness of the baffle, the radius of the baffle and the loss coefficient.
Preferably, in determining the water drive strength of the separator after the medicament is glued according to the indoor strength experiment, the step of determining the thickness of the separator comprises the following steps: determining a production pressure difference of the current production well according to the viscosity of the crude oil and the strength of the bottom water; determining the water drive strength of the partition board after the agent is glued by using an indoor strength experiment; and dividing the production pressure difference of the current production well and the water flooding strength to obtain the thickness of the partition plate.
Preferably, the step of monitoring the oil-water interface location and determining the radius of the circular bottom water baffle defined by the current production well reservoir body formed by the baffle agent at said interface location comprises: fitting the region formed by the oil reservoir body of the production well into a sphere; determining the relative positional relationship between the interface position and the sphere; and determining the radius of the partition plate by utilizing the vertical section of the cone formed by the oil-water interface and the center of the sphere based on the relative position relation.
Preferably, in the step of obtaining the separator agent injection volume based on the separator thickness, the separator radius, and the loss coefficient, the separator agent injection volume is calculated using the following expression:
V＝kπr 2 h
wherein V represents the separator agent injection volume, k represents the loss coefficient, h represents the separator thickness, and r represents the separator radius.
Preferably, the loss factor ranges from 1.2 to 1.5.
In addition, the invention also provides a reagent injection amount determining system for the bottom water of the fracture-cavity type oil reservoir partition board, which comprises the following steps: the thickness generation module is configured to determine the thickness of the partition plate according to the production pressure difference of the current production well and the water drive strength after the partition plate is subjected to medicament gel formation; a radius generation module configured to monitor an oil-water interface location, determine a radius of a circular bottom-water control baffle defined by a current production well reservoir body formed by a baffle agent at the interface location; the loss coefficient generation module is configured to determine the effective thickness of a partition plate formed after the partition plate medicament is glued in oil water under a preset high-temperature deep well oil reservoir temperature threshold value through an indoor experiment, so as to obtain a loss coefficient representing the loss degree of the partition plate medicament from injection to formation of a bottom water control partition plate; a result generation module configured to obtain a septum medicament infusion volume based on the septum thickness, the septum radius, and the loss coefficient.
Preferably, the thickness generation module includes: a production pressure difference determining unit configured to determine a production pressure difference of the current production well according to the viscosity of crude oil and the strength of bottom water; the glue forming intensity determining unit is configured to determine the water driving intensity of the partition plate after the glue forming by using an indoor intensity experiment; and the separator thickness determining unit is configured to divide the production pressure difference of the current production well and the water flooding strength to obtain the separator thickness.
Preferably, the radius generation module includes: a reservoir volume fitting unit configured to fit a region formed by the production well reservoir volume into a sphere; a relative position determining unit configured to determine a relative positional relationship of the interface position and the sphere; and a partition radius determining unit configured to determine the partition radius using a vertical cross section of a cone formed by an oil-water interface and a center of the sphere based on the relative positional relationship.
Preferably, in the result generation module, the septum agent injection amount volume is calculated using the following expression:
V＝kπr 2 h
wherein V represents the separator agent injection volume, k represents the loss coefficient, h represents the separator thickness, and r represents the separator radius.
Preferably, the loss factor ranges from 1.2 to 1.5.
One or more embodiments of the above-described solution may have the following advantages or benefits compared to the prior art:
the invention provides a method and a system for determining the injection quantity of a medicament for controlling bottom water of a fracture-cavity type oil reservoir partition board. The method and the system establish a calculation method which can provide reference for the self-spreading partition board water control system to treat the injection quantity of the karst cave type oil reservoir flooding well, perform quantitative calculation on the injection agent in the fracture cave type oil reservoir partition board bottom water control technology, overcome the inefficiency caused by insufficient injection quantity, and simultaneously avoid the phenomenon of complete blockage caused by too much injection quantity, so that the oil well oil increasing effect is obvious, and the oil well recovery ratio is improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention, without limitation to the invention. In the drawings:
fig. 1 is a step diagram of a method for determining injection amount of a chemical agent for bottom water of a fracture-cavity oil reservoir separator according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a method for determining injection quantity of a traditional Chinese medicine agent for determining injection quantity of bottom water of a fracture-cavity oil reservoir separator according to an embodiment of the present application.
Fig. 3 is a step chart of calculating the thickness of a separator in the method for determining the injection amount of the agent for controlling the bottom water of the separator of the fracture-cavity type oil reservoir according to the embodiment of the present application.
Fig. 4 is a step chart of calculating a radius of a separator in the method for determining an injection amount of a chemical agent for controlling bottom water of a fracture-cavity type oil reservoir separator according to an embodiment of the present application.
FIG. 5 is a block diagram of a reagent injection amount determination system for bottom water control of a fracture-cavity reservoir separator according to an embodiment of the present application.
Detailed Description
The following will describe embodiments of the present invention in detail with reference to the drawings and examples, thereby solving the technical problems by applying technical means to the present invention, and realizing the technical effects can be fully understood and implemented accordingly. It should be noted that, as long as no conflict is formed, each embodiment of the present invention and each feature of each embodiment may be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.
Bottom water coning is an important reason for reducing single well production and recovery of bottom water reservoirs. For a fracture-cavity type bottom water reservoir, the reservoir has larger difference from a pore type and a fractured hydrocarbon reservoir, and holes, cracks and holes in the reservoir coexist, wherein a large-scale ancient karst cavity system is a main reservoir space. Reservoir dimensions vary widely in space, with the reservoir spatial distribution being discontinuous. After the oil and gas well is put into operation, water coning easily occurs in the oil and gas layer due to the influence of gravity difference of the oil, water or gas and water. Along with the increase of oil extraction and gas velocity, the water cone continuously rises to break through and enter the bottom of the well, so that the oil and gas are produced simultaneously, the oil and gas yield is reduced, and the process that the bottom water is pushed along with the oil extraction and gas in a conical longitudinal direction is generated, so that the phenomenon of bottom water coning is very unfavorable for the exploitation of oil reservoirs and gas reservoirs.
The self-spreading partition board water control system is used for treating karst cave type oil reservoir flooding well, a certain amount of partition board system is injected into stratum from oil pipe of oil well, after a period of time, the self-spreading partition board is fully spread into glue between oil-water interface, so that the functions of inhibiting bottom water cone, raising crude oil yield and reducing water content are achieved. Because the medicament system is not dissolved in oil or water, the numerical quantification of the injection amount is critical, and if the injection amount is too large, the oil and water are easily blocked; if the injection amount is small, the water cone is not inhibited, and the water control effect is not achieved.
The partition board in the existing partition board bottom water control technology mainly aims at sandstone oil and gas reservoirs, and a fracture-cavity type oil reservoir cannot judge a water law and an oil-water interface due to the fact that the fracture-cavity structure is complex, so that the existing partition board parameter design method cannot meet the water control requirement of the fracture-cavity type oil reservoir.
In order to solve the technical problems, the invention provides a method and a system for determining the injection quantity of the medicament for controlling bottom water of a fracture-cavity type oil reservoir partition board. According to the method and the system, firstly, the thickness of the partition plate for quantifying the injection volume and the loss parameter of the partition plate medicament are determined through various indoor experiments, and then, the radius of the partition plate for quantifying the injection volume is determined through an oil-water interface monitoring technology on a production site, so that the volume of the bottom water partition plate formed by the partition plate medicament after the gel formation is determined by utilizing the principle that the oil reservoir area of a production well is regarded as a spherical oil reservoir body, and the injection volume of the corresponding partition plate medicament and the corresponding injection volume are calculated. Thus, the invention establishes a calculation method which can provide reference for the injection quantity of the karst cave type oil reservoir flooding well for the self-spreading partition board water control system. Therefore, the design of the quantitative calculation method of the injection quantity of the fracture-cavity type oil reservoir partition board clearly plays a positive role in the development of the existing fracture-cavity type carbonate oil reservoir.
Fig. 1 is a step diagram of a method for determining injection amount of a chemical agent for bottom water of a fracture-cavity oil reservoir separator according to an embodiment of the present application. Fig. 1 shows the steps of the method for determining the injection amount of a drug according to the present invention.
First, step S110 further determines the thickness of the separator formed after the agent is applied according to the current production pressure difference of the production well and the water flooding strength of the separator after the agent is applied. Fig. 3 is a step chart of calculating the thickness of a separator in the method for determining the injection amount of the agent for controlling the bottom water of the separator of the fracture-cavity type oil reservoir according to the embodiment of the present application. As shown in fig. 3, in step S110, it is first necessary to acquire crude oil viscosity and bottom water strength data, and determine the production pressure difference of the production well currently required for evaluation of the partition agent injection amount, step S1101. Then, the indoor strength experiment is utilized to determine the water drive strength of the partition board after the agent is glued, and step S1102. Preferably, in the embodiment of the invention, the water flooding strength of the separator after the medicament is glued is 0.17MPa/mm. Next, step S1103 divides the production pressure difference of the current production well and the water flooding strength after the separator agent to be injected into the production well is glued, so as to obtain the thickness of the bottom water control separator. The bottom water control partition plate is formed by forming glue at an oil-water interface in a production well oil-water storage area by the partition plate medicament to be injected and is used for inhibiting the action of a bottom water cone, and has a certain thickness.
After determining the separator thickness, the ending step S110 proceeds to step S120. Step S120 monitors the oil-water interface position and determines the radius of a circular bottom water control baffle defined by the current production well reservoir body formed by the baffle agent at the current oil-water interface position. In the embodiment of the invention, the oil reservoir area of the current production well needs to be fitted into an approximately spherical oil reservoir body, the radius of the oil reservoir body is R (see fig. 2), and the oil-water interface is located in the space defined by the spherical oil reservoir body. Fig. 2 is a schematic diagram of a method for determining injection quantity of a traditional Chinese medicine agent for determining injection quantity of bottom water of a fracture-cavity oil reservoir separator according to an embodiment of the present application. As shown in fig. 2, R is a sphere radius, R is a baffle radius, h is a baffle thickness, a circular part in fig. 2 represents a vertical section of the oil reservoir body passing through the sphere center, a black bar part represents an oil-water interface, and the bottom water control baffle is a circular area formed under the latitude of the oil-water interface in a spherical space defined by the oil reservoir body.
In the embodiment of the invention, the oil reservoir area distribution condition of the current production well is monitored in real time by utilizing the acoustic wave receiving and transmitting device on the production well site and utilizing the acoustic wave reflection principle, so that the oil-water interface position is determined before the baffle water control treatment construction is implemented.
Fig. 4 is a step chart of calculating a radius of a separator in the method for determining an injection amount of a chemical agent for controlling bottom water of a fracture-cavity type oil reservoir separator according to an embodiment of the present application. As shown in fig. 4, in step S120, first, the region (reservoir region) formed by the current production well reservoir body is fitted into a sphere by step S1201, and the process proceeds to step S1202. Step S1202 determines the relative positional relationship between the oil-water interface position and the current sphere (the current spherical production well reservoir body), that is, referring to fig. 2, determines the distance between the current oil-water interface position and the spherical center of the spherical production well reservoir body, and proceeds to step S1203.
After the karst cave type water cone is shut down in a production oil well, oil and water are balanced naturally under the action of gravity, an oil-water interface after natural balancing is the placement position of a bottom water control partition plate, and the radius of the partition plate is determined according to the cone and spherical volume calculation principle. Step S1203 is based on the relative positional relationship obtained in step S1202, and determines the radius of the bottom water control partition by using the vertical cross section of the cone formed by the bottom water control partition at the current oil-water interface and the center of the current spherical production well reservoir (at this time, the vertical cross section passes through the center of the sphere and is approximately triangular). That is, in step S1203, the radius of the bottom water control partition is calculated from the distance between the current oil-water interface position and the spherical center of the spherical production well reservoir body based on the diameter of the current circular bottom water control partition and the cross section formed by the spherical center of the current spherical production well reservoir body.
After determining the separator radius, the ending step S120 proceeds to step S130. Step S130, determining the effective thickness of a partition plate formed after the partition plate agent is formed into gel in oil water under a temperature threshold value through an indoor experiment by utilizing a preset temperature threshold value of a high-temperature deep well oil reservoir, and obtaining a loss coefficient of the agent injected into the partition plate agent and formed into gel. Wherein the loss coefficient represents a coefficient of a corresponding degree of loss in the process of forming the bottom water control separator after the separator agent to be injected is injected from the beginning to the gel formation. Wherein the larger the loss amount, the larger the coefficient value.
For a high-temperature deep well karst cave type oil reservoir, the temperature of the stratum oil reservoir body is very high and even can reach 130 ℃, and for a baffle agent, degradation can easily occur to a certain extent in a deep well high-temperature environment, so that the formed baffle after gel formation can have a certain degree of loss compared with the injection amount of the baffle agent actually injected from the wellhead of a production well, and therefore, in order to obtain more accurate baffle agent injection amount data, the loss rate of the baffle after gel formation from the wellhead needs to be determined through an indoor experiment. Specifically, according to an indoor experiment, the effective thickness of the separator agent after final gel formation in oil water at 130 ℃ is determined, and then, the experiment is repeated, and the loss coefficient of the separator agent is further determined by determining the total amount of the separator agent after gel formation. Preferably, in the embodiment of the present invention, the loss coefficient of the separator agent to be injected currently is determined to be in the range of 1.2 to 1.5 through the above-described indoor experiment.
At this time, after determining the loss factor of the separator agent, step S130 is ended and the process proceeds to step S140. Step S140 obtains the injection volume of the current septum agent to be injected by using the injection volume calculation formula according to the thickness of the septum obtained in step S110, the radius of the septum obtained in step S120, and the loss coefficient obtained in step S130. Wherein, the injection volume calculation formula is represented by the following expression:
V＝kπr 2 h (1)
where V represents the injection volume of the current septum agent, k represents the loss coefficient, h represents the septum thickness, and r represents the septum radius. In this way, the volume of the optimal injection amount of the spacer agent required for the spacer bottom water control construction for the current production well is obtained through the steps S110 to S140, and the actual injection amount of the spacer agent required for the current spacer bottom water control construction is determined by further using the information such as the density of the spacer agent to be injected, the pumping speed of the injection device performing the operation of injecting the spacer agent, and the like.
Therefore, after the method disclosed by the embodiment of the invention is adopted to carry out baffle bottom water control construction on the production oil well, the oil well has obvious effect. For example, 43 tons of baffle agent are injected into TH10249 wells, after 3 days of flushing, production is started, the average daily oil increase is 6.7 tons, and 733 tons of oil increase are accumulated.
On the other hand, based on the method for determining the injection quantity of the medicament for controlling the bottom water of the fracture-cavity type oil reservoir separator, the invention also provides a system for determining the injection quantity of the medicament for controlling the bottom water of the fracture-cavity type oil reservoir separator. FIG. 5 is a block diagram of a reagent injection amount determination system for bottom water control of a fracture-cavity reservoir separator according to an embodiment of the present application. As shown in fig. 5, the drug injection amount determination system according to the present invention includes: a thickness generation module 51, a radius generation module 52, a loss coefficient generation module 53, and a result generation module 54.
Wherein, the thickness generating module 51 is implemented according to the method described in the step S110, and is configured to further determine the thickness of the separator according to the current production pressure difference of the production well and the water flooding strength after the separator is glued. The radius generation module 52 is configured to monitor the oil-water interface location and determine the radius of the circular bottom-water separator defined by the current production well reservoir formed by the separator agent at the current oil-water interface location, in accordance with the method described in step S120 above. The loss coefficient generation module 53 is implemented according to the method described in the above step S130, and is configured to determine, by using a preset temperature threshold of the high-temperature deep well oil reservoir, an effective thickness of the separator formed after the separator agent is gelled in the oil water under the temperature threshold through an indoor experiment, so as to obtain a loss coefficient representing a degree of loss of the separator agent from injection to formation of the bottom water separator. The result generation module 54 is implemented as described in step S140 above, and is configured to obtain a septum agent injection volume based on the septum thickness, the septum radius, and the loss coefficient.
Further, the thickness generation module 51 includes: a production pressure difference determining unit 511, an adhesive-forming water drive strength determining unit 512, and a separator thickness determining unit 513. The production pressure difference determining unit 511 is implemented according to the method described in the above step S1101, and is configured to determine the production pressure difference of the current production well according to the viscosity of the crude oil and the strength of the bottom water. The glue-formation intensity determination unit 512 is implemented according to the method described in the above step S1102, and is configured to determine the water-formation intensity of the separator after the glue formation by using an indoor intensity experiment. The diaphragm thickness determination unit 513 is implemented according to the method described in the above step S1103, and is configured to divide the production pressure difference of the current production well by the water flooding strength to obtain the diaphragm thickness.
Further, the radius generation module 52 includes: a reservoir volume fitting unit 521, a relative position determining unit 522, and a separator radius determining unit 523. The reservoir volume fitting unit 521 is implemented as described in the above step S1201 and is configured to fit the region formed by the production well reservoir volume into a sphere. The relative position determining unit 522 is implemented according to the method described in the above step S1202, and is configured to determine the relative positional relationship between the current oil-water interface position and the current sphere. The diaphragm radius determining unit 523 is implemented according to the method described in the above step S1203, and is configured to determine the diaphragm radius by using the vertical cross section of the cone formed by the current oil-water interface and the center of the current sphere based on the current relative positional relationship.
Further, the result generation module 54 is further configured to obtain a septum agent injection volume using an injection volume calculation formula based on the septum thickness, the septum radius, and the loss coefficient. Wherein, the injection volume calculation formula is represented by the following expression:
V＝kπr 2 h
wherein V represents the volume of the partition wall agent injection amount, k represents the loss coefficient, h represents the partition wall thickness, and r represents the partition wall radius.
Further, the loss coefficient of the current separator agent obtained in the loss coefficient generation module 53 ranges from 1.2 to 1.5.
The invention relates to a method and a system for determining the injection quantity of a medicament for controlling bottom water of a fracture-cavity type oil reservoir partition board. The method and the system establish a method for determining the injection quantity of a medicament system for treating the bottom water cone effect by adopting a self-spreading partition plate medicament system aiming at karst cave type sudden water flooding wells, and the method introduces a loss coefficient, overcomes the inefficiency caused by insufficient injection quantity, also avoids the phenomenon of complete blockage caused by too much injection quantity, and has obvious oil well oil increasing effect and improves the recovery ratio of an oil well after partition plate bottom water control construction is carried out by adopting the method.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (6)
1. The method for determining the injection quantity of the agent for controlling the bottom water of the fracture-cavity type oil reservoir partition plate is characterized by comprising the following steps of:
determining the thickness of the partition plate according to the production pressure difference of the current production well and the water drive strength after the partition plate is subjected to agent gel forming, wherein the method comprises the following steps: firstly, determining the production pressure difference of the current production well according to the viscosity of crude oil and the strength of bottom water, then determining the water drive strength of the separator after the agent is glued by utilizing an indoor strength experiment, and finally, dividing the production pressure difference of the current production well and the water drive strength to obtain the thickness of the separator;
monitoring the oil-water interface position, determining the radius of a circular bottom-water control baffle defined by the current production well reservoir body formed by baffle agent at the interface position, wherein the method comprises the following steps: firstly, fitting a region formed by an oil reservoir body of a production well into a sphere, then determining the relative position relation between the oil-water interface position and the sphere, and finally determining the radius of the partition plate by utilizing the vertical section of a cone formed by the oil-water interface and the sphere center of the sphere based on the relative position relation;
determining the effective thickness of a partition plate formed after the partition plate medicament is glued in oil water under a preset temperature threshold value of a high-temperature deep well oil reservoir through an indoor experiment, and obtaining a loss coefficient representing the loss degree of the partition plate medicament from injection to formation of a bottom water partition plate;
and obtaining the injection volume of the baffle agent according to the thickness of the baffle, the radius of the baffle and the loss coefficient.
2. The agent injection amount determination method according to claim 1, wherein in the step of obtaining a separator agent injection amount volume based on the separator thickness, the separator radius, and the loss coefficient, the separator agent injection amount volume is calculated using the following expression:
V＝kπr 2 h
wherein V represents the separator agent injection volume, k represents the loss coefficient, h represents the separator thickness, and r represents the separator radius.
3. The method of determining an injection amount of a chemical according to claim 1 or 2, wherein the loss factor is in a range of 1.2 to 1.5.
4. A reagent injection amount determining system for bottom water control of a fracture-cavity type oil reservoir separator, comprising:
the thickness generation module is configured to determine the thickness of the partition plate according to the production pressure difference of the current production well and the water drive strength after the partition plate is subjected to medicament gel formation;
a radius generation module configured to monitor an oil-water interface location, determine a radius of a circular bottom-water control baffle defined by a current production well reservoir body formed by a baffle agent at the interface location;
the loss coefficient generation module is configured to determine the effective thickness of a partition plate formed after the partition plate medicament is glued in oil water under a preset high-temperature deep well oil reservoir temperature threshold value through an indoor experiment, so as to obtain a loss coefficient representing the loss degree of the partition plate medicament from injection to formation of a bottom water control partition plate;
a result generation module configured to obtain a septum medicament infusion volume from the septum thickness, the septum radius, and the loss coefficient, wherein the thickness generation module comprises:
a production pressure difference determining unit configured to determine a production pressure difference of the current production well according to the viscosity of crude oil and the strength of bottom water;
the glue forming intensity determining unit is configured to determine the water driving intensity of the partition plate after the glue forming by using an indoor intensity experiment;
the separator thickness determining unit is configured to divide the production pressure difference of the current production well and the water flooding strength to obtain the separator thickness; and, the radius generation module includes:
a reservoir volume fitting unit configured to fit a region formed by the production well reservoir volume into a sphere;
a relative position determining unit configured to determine a relative positional relationship of the interface position and the sphere;
and a diaphragm radius determining unit configured to determine the diaphragm radius using a vertical cross section of a cone formed by an oil-water interface and a center of the sphere based on the relative positional relationship.
5. The agent injection amount determination system according to claim 4, wherein in the result generation module, the diaphragm agent injection amount volume is calculated using the following expression:
V＝kπr 2 h
wherein V represents the separator agent injection volume, k represents the loss coefficient, h represents the separator thickness, and r represents the separator radius.
6. The medication injection amount determination system according to claim 4 or 5, wherein the loss factor ranges from 1.2 to 1.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010099536.9A CN113338882B (en) | 2020-02-18 | 2020-02-18 | Method and system for determining injection quantity of medicament for controlling bottom water of fracture-cavity type oil reservoir separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010099536.9A CN113338882B (en) | 2020-02-18 | 2020-02-18 | Method and system for determining injection quantity of medicament for controlling bottom water of fracture-cavity type oil reservoir separator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113338882A CN113338882A (en) | 2021-09-03 |
| CN113338882B true CN113338882B (en) | 2023-04-25 |
Family
ID=77467076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010099536.9A Active CN113338882B (en) | 2020-02-18 | 2020-02-18 | Method and system for determining injection quantity of medicament for controlling bottom water of fracture-cavity type oil reservoir separator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113338882B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2154156C2 (en) * | 1998-06-22 | 2000-08-10 | Предприятие "Астраханьгазпром" РАО "Газпром" | Method of oil-gas pool development |
| CN1560428A (en) * | 2004-02-25 | 2005-01-05 | 石油大学(华东) | A Decision-Making Method for Water Shutoff in Bottom Water Reservoirs |
| CN109958404A (en) * | 2019-03-19 | 2019-07-02 | 西南石油大学 | Simulation method of bottom water coning in bottom water reservoir and calculation method of water plugging and profile control agent parameters |
| CN110685637A (en) * | 2019-11-05 | 2020-01-14 | 西南石油大学 | A water plugging method for establishing a large-area chemical partition at the gas-water interface of a gas reservoir with water |
-
2020
- 2020-02-18 CN CN202010099536.9A patent/CN113338882B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2154156C2 (en) * | 1998-06-22 | 2000-08-10 | Предприятие "Астраханьгазпром" РАО "Газпром" | Method of oil-gas pool development |
| CN1560428A (en) * | 2004-02-25 | 2005-01-05 | 石油大学(华东) | A Decision-Making Method for Water Shutoff in Bottom Water Reservoirs |
| CN109958404A (en) * | 2019-03-19 | 2019-07-02 | 西南石油大学 | Simulation method of bottom water coning in bottom water reservoir and calculation method of water plugging and profile control agent parameters |
| CN110685637A (en) * | 2019-11-05 | 2020-01-14 | 西南石油大学 | A water plugging method for establishing a large-area chemical partition at the gas-water interface of a gas reservoir with water |
Non-Patent Citations (4)
| Title |
|---|
| 化学隔板堵水技术在涠洲11-4油田的应用;刘双琪等;《中国海上油气》;20070228(第01期);全文 * |
| 底水油藏化学堵水技术的应用;贺永军等;《石油天然气学报》;20100415(第02期);全文 * |
| 底水油藏油井注入堵剂的合理隔板半径研究;汪益宁等;《钻采工艺》;20141125(第06期);全文 * |
| 底水油藏采水消锥复合工艺优化设计;杜殿发等;《广西大学学报(自然科学版)》;20100620(第03期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113338882A (en) | 2021-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107545088B (en) | Normal-pressure shale gas horizontal well volume fracturing method | |
| CN107066769B (en) | A high-efficiency acidizing design method suitable for ultra-deep fractured carbonate reservoirs | |
| CN106567702A (en) | Method for improving complexity index of deep shale gas fracture | |
| CN104632123A (en) | Ultralow-pressure well plugging method | |
| CN110630240B (en) | Carbonate reservoir multi-stage alternate acid fracturing discharge capacity optimization method | |
| CN113513295B (en) | Method for improving uniform extension and support of multi-cluster cracks in section | |
| CN111911122B (en) | Fracturing method for unswept area of shale gas encrypted well | |
| CN112253066A (en) | Method for improving fracture complexity and transformation volume of deep shale gas | |
| CN108661626B (en) | High-temperature high-pressure well wall water invasion simulation experiment device | |
| CN109751036A (en) | A method for delaying the volume decline of effective fracture stimulation in deep shale gas | |
| CN110761754A (en) | Water injection method for fracture-cave type carbonate reservoir well group unit | |
| CN113338882B (en) | Method and system for determining injection quantity of medicament for controlling bottom water of fracture-cavity type oil reservoir separator | |
| CN109577938A (en) | Fracturing method for tight oil reservoir horizontal well through stratum | |
| Zuo et al. | Experimental study on gas adsorption and drainage of gas-bearing coal subjected to tree-type hydraulic fracturing | |
| CN103266870B (en) | A kind of determination method and system of oil-gas reservoir water blocking damage radius | |
| CN110886592A (en) | Oil-water well grading corrosion deblocking method | |
| CN109751028A (en) | A fracturing method and construction process for carbonate rock | |
| Zhou et al. | Case study: YM204 obtained high petroleum production by acid fracture treatment combining fluid diversion and fracture reorientation | |
| CN212927815U (en) | Dual medium oil reservoir horizontal well completion structure | |
| CN101747879A (en) | Baffle for thin layer oilfield controlling coning of bottom water and injection method thereof | |
| CN103912247A (en) | Gas well horizontal well multistage slug process | |
| CN112302613B (en) | Deep carbonate rock self-supporting acid fracturing method for improving acid-etched fracture channel depth | |
| CN109138960A (en) | A kind of fracturing fluid and fracturing process | |
| CN110094193A (en) | Fracturing method of clastic rock buried hill inside curtain reservoir | |
| CN115163027A (en) | Method for treating water coning or ridge entering at bottom of oil well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |