CN109839154A - A kind of oil well measurement system and method - Google Patents
A kind of oil well measurement system and method Download PDFInfo
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- CN109839154A CN109839154A CN201910096475.8A CN201910096475A CN109839154A CN 109839154 A CN109839154 A CN 109839154A CN 201910096475 A CN201910096475 A CN 201910096475A CN 109839154 A CN109839154 A CN 109839154A
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- 239000003129 oil well Substances 0.000 title claims abstract description 38
- 238000005259 measurement Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title abstract description 17
- 239000000872 buffer Substances 0.000 claims abstract description 154
- 239000007788 liquid Substances 0.000 claims abstract description 144
- 238000004891 communication Methods 0.000 claims abstract description 10
- 239000007791 liquid phase Substances 0.000 claims description 13
- 239000012071 phase Substances 0.000 claims description 11
- 238000000691 measurement method Methods 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 8
- 238000003860 storage Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 61
- 239000010779 crude oil Substances 0.000 description 16
- 238000013499 data model Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
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Abstract
The present invention discloses a kind of oil well measurement system and method.The system includes: inlet tube, drain pipe, liquid inlet tee joint valve, the first buffer, the second buffer, liquid outlet threeway valve, appendix and cross over pipe；The outlet end of inlet tube and the inlet communication of liquid inlet tee joint valve；The first outlet of liquid inlet tee joint valve is connected to the top inlet of the first buffer, and second outlet is connected to the top inlet of the second buffer；The bottom liquid outlet of first buffer and the first inlet communication of liquid outlet threeway valve, the bottom liquid outlet of the second buffer and the second inlet communication of liquid outlet threeway valve；The outlet of liquid outlet threeway valve is connected to the liquid feeding end of drain pipe；The top of first buffer and the second buffer is connected to by cross over pipe；One end of appendix is connected to the top of the first buffer and the second buffer, and the other end is connected to drain pipe；Only one outlet is in the open state at any time for liquid inlet tee joint valve.The measurement error of oil well can be reduced using system and method for the invention.
Description
Technical field
The present invention relates to field of petroleum exploitation, more particularly to a kind of oil well measurement system and method.
Background technique
In the production process of exploitation petroleum, the metering of oil well is a highly important job.Crude oil for a long time
Surveying production is to cooperate separator or other measuring equipments to complete by manual switching metering valve group.This mode needs largely
Operator, and it is time-consuming and laborious in manual switching valve.Some companies are controlled using motor-driven valve in recent years, although electronic
Valve can realize folding in a short period of time, but determine height when the oil liquid in separator reaches, after separator metering
During starting tapping, still there is crude oil to enter separator, the crude oil entered in separator at this time can not participate in metering,
The continuous data that will lead to oil well in this way generates error, and the number measured in a measurement period is more, metering
Error will be bigger.
Summary of the invention
The object of the present invention is to provide a kind of oil well measurement system and methods, reduce the measurement error of oil well.
A kind of oil well measurement system, comprising: inlet tube, drain pipe, liquid inlet tee joint valve, the first buffer, the second buffer,
Liquid outlet threeway valve, appendix and cross over pipe；
The inlet communication of the outlet end of the inlet tube and the liquid inlet tee joint valve；The first outlet of the liquid inlet tee joint valve
Be connected to the top inlet of the first buffer, the top of the second outlet of the liquid inlet tee joint valve and second buffer into
The connection of liquid mouth；First inlet communication of the bottom liquid outlet of first buffer and the liquid outlet threeway valve, described second temporarily
Second inlet communication of the bottom liquid outlet of storage and the liquid outlet threeway valve；The outlet and the drain of the liquid outlet threeway valve
The liquid feeding end of pipe is connected to；First buffer is connected to by the cross over pipe with the top of second buffer；The gas transmission
One end of pipe is connected to the top of first buffer and second buffer, and the other end is connected to the drain pipe；
Only one outlet is in the open state at any time for the liquid inlet tee joint valve.
Optionally, the liquid inlet tee joint valve and the liquid outlet threeway valve are electric T-shaped valve；The liquid outlet threeway valve
First entrance is provided with the first solenoid valve, and first solenoid valve is used to control beating for the first import of the liquid outlet threeway valve
Push And Release closes；Second entrance of the liquid outlet threeway valve is provided with second solenoid valve, and the second solenoid valve is for controlling institute
State the on and off of the second import of liquid outlet threeway valve.
Optionally, the bottom of first buffer is provided with the first differential pressure transmitter, in second buffer
Bottom is provided with the second differential pressure transmitter；First differential pressure transmitter is used to detect the liquid level of liquid in first buffer
Or quality；Second differential pressure transmitter is used to detect the liquid level or quality of liquid in second buffer.
Optionally, gas flowmeter is provided on the appendix；The gas flowmeter is for detecting the gas transmission
Gas flow in pipe.
Optionally, which further includes PLC intelligence control system；The signal of the PLC intelligence control system
Input terminal is connect with first differential pressure transmitter, second differential pressure transmitter and the gas flowmeter, the PLC intelligence
The control output end of control system is connect with first solenoid valve, the second solenoid valve and the liquid inlet tee joint valve；Institute
PLC intelligence control system is stated for according to the control of the signal of first differential pressure transmitter and second differential pressure transmitter
The first outlet of first solenoid valve, the control on and off of the second solenoid valve and the liquid inlet tee joint valve goes out with second
Mouthful it is on and off；It is also used to acquire the flow value of the gas flowmeter.
Optionally, gas phase check valve is provided on the appendix, the gas phase check valve is located at the gas flow
The downstream of meter；The gas phase check valve is used to prevent the gas backflow in the appendix.
Optionally, liquid phase check valve is installed on the drain pipe, the liquid phase check valve is located at the drain pipe
With the upstream of the appendix connectivity part；The liquid phase check valve is for preventing the gas backflow in the appendix from entering described the
In one buffer and second buffer.
Optionally, which further includes computer；The signal input part of the computer and PLC intelligence
The signal output end of control system connects, and the signal that PLC intelligence control system is used to will test is sent to the computer；Institute
Computer is stated for measuring to fuel-displaced data.
Invention additionally discloses a kind of oil well measurement methods, are applied to above-mentioned oil well measurement system；The oil well measurement method
Include:
After receiving enabling signal, the first solenoid valve and second solenoid valve are closed, control liquid inlet tee joint valve opens first
Second outlet is exported and closed, flows into oil in the first buffer by inlet tube and liquid inlet tee joint valve；
When the differential pressure signal that the second differential pressure transmitter received is sent indicates to generate pressure difference, determine that described first is temporary
Oil in device has risen to the position of the cross over pipe, and control liquid inlet tee joint valve opens second outlet and closes first outlet, makes
Oil is flowed into the second buffer by inlet tube and liquid inlet tee joint valve；
Opening the first solenoid valve is discharged the oil in the first buffer by the drain pipe；
When the differential pressure signal that the first differential pressure transmitter received is sent indicates no pressure difference, first buffer is determined
Interior oil discharge finishes, and closes the first solenoid valve；
After closing the first solenoid valve, when the differential pressure signal that the first differential pressure transmitter received is sent indicates to generate pressure difference
When, determine that the oil in second buffer has risen to the position of the cross over pipe, control liquid inlet tee joint valve is opened first and gone out
Mouth simultaneously closes second outlet, flows into oil in the first buffer by inlet tube and liquid inlet tee joint valve；
Opening second solenoid valve is discharged the oil in the second buffer by the drain pipe；
When the differential pressure signal that the second differential pressure transmitter received is sent indicates no pressure difference, second buffer is determined
Interior oil discharge finishes, and closes the second solenoid valve, to realize in the oil and the second buffer in the first buffer
The alternating metering of oil；
It repeats step and " when the differential pressure signal that the second differential pressure transmitter received is sent indicates to generate pressure difference, determines institute
State the position that the oil in the first buffer has risen to the cross over pipe, control liquid inlet tee joint valve opens second outlet and closes the
One outlet, flows into oil in the second buffer by inlet tube and liquid inlet tee joint valve " to step " when the second differential pressure received becomes
When the differential pressure signal for sending device to send indicates no pressure difference, determines that the oil discharge in second buffer finishes, close described second
Solenoid valve " repeatedly alternately measures the multiple of the oil in the oil and the second buffer in the first buffer to realize.
Optionally, oil well measurement method further include: obtain the gas flow values of the gas flowmeter detection in real time simultaneously
It is sent to computer；
After determining that the oil in first buffer has risen to the position of the cross over pipe, the first electromagnetism is being opened
Before the oil in the first buffer is discharged by the drain pipe in valve, further includes:
It obtains the pressure difference signal that first differential pressure transmitter detects and is sent to computer；
After determining that the oil in second buffer has risen to the position of the cross over pipe, the second electromagnetism is being opened
Before the oil in the second buffer is discharged by the drain pipe in valve, further includes:
It obtains the pressure difference signal that second differential pressure transmitter detects and is sent to computer.
The specific embodiment provided according to the present invention, the invention discloses following technical effects: oil disclosed in this invention
Two buffers are arranged in well metering system and method, and a cross over pipe is connected between two buffers, when one of them is temporary
When oil in storage is full, make another buffer of the oily automatic stream of excess enthalpy, and the flow direction for switching oil is protected to another buffer
When demonstrate,proving the discharge of the measurement and oil to one of buffer progress oil mass, makes the oil uninterruptedly flowed into that can not participate in measuring, have
Effect avoids the error during oil measurement, improves the accuracy of measuring.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the system construction drawing of oil well measurement system embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of oil well measurement system and methods, reduce the measurement error of oil well.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Fig. 1 is the system construction drawing of oil well measurement system embodiment of the present invention.
A kind of oil well measurement system, comprising: inlet tube 1, drain pipe 2, liquid inlet tee joint valve 12, the first buffer 9, second are temporarily
Storage 10, liquid outlet threeway valve 6, appendix 13 and cross over pipe 11；
The inlet communication of the outlet end of the inlet tube 1 and the liquid inlet tee joint valve 12；The of the liquid inlet tee joint valve 12
One outlet is connected to the top inlet of the first buffer 9, and the second outlet of the liquid inlet tee joint valve 12 is temporary with described second
The top inlet of device 10 is connected to；First import of the bottom liquid outlet of first buffer 9 and the liquid outlet threeway valve 6 is logical
Flange connection is crossed, the second import of the bottom liquid outlet of second buffer 10 and the liquid outlet threeway valve 6 is connected by flange
It is logical；The outlet of the liquid outlet threeway valve 6 is connected to the liquid feeding end of the drain pipe 2；The cross over pipe 11 is kept in described first
Device 9 is connected to the top of second buffer 10；One end of the appendix 13 and first buffer 9 and described the
The top of two buffers 10 is connected to, and the other end is connected to the drain pipe 2；
The height of the top inlet of the top inlet of first buffer 9 and the second buffer 10 is higher than cross over pipe 11
Highly.
Only one outlet is in the open state at any time for the liquid inlet tee joint valve 12, when first outlet is opened,
Second outlet is closed；When second outlet is opened, first outlet is closed.
As an alternative embodiment, the liquid inlet tee joint valve 12 and the liquid outlet threeway valve 6 are electric three passes
Valve；First entrance of the liquid outlet threeway valve 6 is provided with the first solenoid valve 4, first solenoid valve 4 for control it is described go out
First import of liquid triple valve 6 it is on and off；Second entrance of the liquid outlet threeway valve 6 is provided with second solenoid valve 5,
The second solenoid valve 5 is used to control the on and off of the second import of the liquid outlet threeway valve 6.
As an alternative embodiment, the bottom of first buffer 9 is provided with the first differential pressure transmitter 7,
The bottom of second buffer 10 is provided with the second differential pressure transmitter 8；First differential pressure transmitter 7 is described for detecting
The liquid level or quality of liquid in first buffer 9；Second differential pressure transmitter 8 is for detecting liquid in second buffer 10
The liquid level or quality of body.
As an alternative embodiment, being provided with gas flowmeter 14 on the appendix 13；The gas stream
Meter 14 is used to detect the gas flow in the appendix 13.
As an alternative embodiment, the oil well measurement system further includes PLC intelligence control system 15；The PLC
The signal input part of intelligence control system 15 and first differential pressure transmitter 7, second differential pressure transmitter 8 and the gas
Flowmeter 14 connects, the control output end of the PLC intelligence control system 15 and first solenoid valve 4, second electromagnetism
Valve 5 and the liquid inlet tee joint valve 12 connection；The PLC intelligence control system 15 is used for according to first differential pressure transmitter 7
The control on and off of first solenoid valve 4, the second solenoid valve 5 is controlled with the signal of second differential pressure transmitter 8
System and the liquid inlet tee joint valve 12 first outlet and second outlet it is on and off；It is also used to acquire the gas flow
The flow value of meter 14.
As an alternative embodiment, being provided with gas phase check valve on the appendix 13, the gas phase is unidirectional
Valve is located at the downstream of the gas flowmeter 14；The gas phase check valve is used to prevent the gas backflow in the appendix 13.
As an alternative embodiment, being equipped with liquid phase check valve 3 on the drain pipe 2, the liquid phase is unidirectional
Valve 3 is located at the upstream with 13 connectivity part of appendix of the drain pipe 2；The liquid phase check valve 3 is described defeated for preventing
Gas backflow in tracheae 13 enters in first buffer 9 and second buffer 10.
As an alternative embodiment, the oil well measurement system further includes computer 16；The letter of the computer 16
Number input terminal is connect with the signal output end of the PLC intelligence control system 15, and PLC intelligence control system 15 is for will test
Signal be sent to the computer 16；The computer 16 is for measuring fuel-displaced data.
The cross over pipe 11 makes the first buffer 9,10 top of the second buffer keep connection, in the first differential pressure transmitter
7, under the cooperation of the second differential pressure transmitter 8 movement, realize two buffers alternately to the metering of oil liquid.When the first buffer
Liquid in 9 rises to the height of cross over pipe 11, and liquid is entered in the second buffer 10 by cross over pipe 11, at this time the second differential pressure
Transmitter 8 senses pressure difference and issues the finger of " liquid in the first buffer 9 has been expired " to PLC intelligence control system 15 immediately
It enables, PLC intelligence control system 15, which controls liquid inlet tee joint valve 12 and flows to liquid, to be switched, and so that crude oil is entered the second buffer 10, out
The first solenoid valve 4 on liquid triple valve 6 is opened, and the liquid in the first buffer 9 enters drain pipe 2 through liquid outlet threeway valve 6, the
Liquid discharge in one buffer 9 finishes, when the first differential pressure transmitter 7 on the first buffer 9 senses no pressure difference signal, the
One solenoid valve 4 is closed.When the liquid in the second buffer 10 rises to the height of cross over pipe 11, liquid is entered by cross over pipe 11
In first buffer 9, the first differential pressure transmitter 7 senses pressure difference and issues " second to PLC intelligence control system 15 immediately at this time
Liquid in buffer 10 has been expired " instruction, PLC intelligence control system 15 control liquid inlet tee joint valve 12 by liquid flow to switch,
Crude oil is set to enter the first buffer 9, the second solenoid valve 5 on liquid outlet threeway valve 6 is opened, the liquid warp in the second buffer 10
Liquid outlet threeway valve 6 enters drain pipe 2, finishes to the liquid discharge in the second buffer 10, second on the second buffer 10 is poor
When pressure transmitter 8 senses no pressure difference signal, second solenoid valve 5 is closed.The first buffer 9, second is realized by the above process
Buffer 10 measures the alternating of crude oil.
Metering, pump efficiency analysis, gas phase metering and crude oil water containing may be implemented using oil well measurement system of the invention
Rate etc..It is specific as follows:
The process that liquid phase is measured:
Starting metering, PLC intelligence control system 15 close the first solenoid valve 4 and second solenoid valve 5, while in seconds
Start timing, when the liquid in the first buffer 9 rises to the height of cross over pipe 11, liquid enters second temporarily by cross over pipe 11
Storage 10, at the same time, the second differential pressure transmitter 8 on the second buffer 10 sense pressure difference and immediately because of the entrance of crude oil
The instruction of " liquid in the first buffer 9 has been expired " is issued to PLC intelligence control system 15, PLC intelligence control system 15 receives
After feedback, computer 16 will send information to, computer 16 will record the differential pressure value P of the first differential pressure transmitter 71, by following
Data model calculates the liquid weight measured every time:
M-- unit K g, liquid quality；
Δ P-- unit Pa, liquid differential pressure body differential pressure value
R-- unit: rice, tank body internal diameter；
G-- acceleration of gravity
The quality m that the first buffer 9 measures a liquid phase can be calculated1。
When the liquid in the second buffer 10 rises to the height of cross over pipe 11, liquid enters first temporarily by cross over pipe 11
Storage 9, the first differential pressure transmitter 7 on the first buffer 9 sense pressure difference and immediately to PLC intelligence control because of the entrance of crude oil
System 15 processed issues the instruction of " liquid in the second buffer 10 has been expired ", after PLC intelligence control system 15 receives feedback, will believe
Breath is sent to computer 16, and computer 16 records the differential pressure value P of the second differential pressure transmitter 82, can be calculated by above-mentioned formula
Two buffers 10 measure the quality m of a liquid phase2。
Show that the liquid phase daily output calculates data model by following data model:
QM-- the liquid daily output, unit: ton/day；
mn-- liquid weight is surveyed every time, unit: kilogram；
T-- time of measuring, unit: second；
The process of pump efficiency analysis:
Starting PLC intelligence control system 15 when metering combines oil-extractor polish-rod right into the upper suspension point course of work from lower suspension point
The time of measuring relationship when size and acquisition data of measurement liquid measure should be recorded, the recovery ratio of oil pumping lubricating oil pump is analyzed and produces liquid
Between artificial situation.
The process that gas phase is measured:
From the first buffer 9, the second buffer 10 be discharged gas enter appendix 13 and through gas flowmeter 14 into
Enter drain pipe 2, when need to measure the same day tolerance when, only need to be read since gas flowmeter 14 need meter period save
The tolerance of point and end node, two data only poor tolerance for as needing to measure.Survey daily gas data model:
Qv-- the gas daily output, unit: Nm3/d；
qv-- the gas flowmeter real-time progressive amount in metering process, unit: Nm3；
q'v-- the cumulant of gas flowmeter, unit: Nm when metering starts3；
T-- time of measuring, unit: second；
The process that crude oil water content is measured:
It include that pure oil and pure water in the moment that liquid inlet tee joint valve 12 is opened adjust the into the crude oil in the first buffer 9
The differential pressure value of one differential pressure transmitter 7 be 0, as the liquid level known altitude H in the first buffer 9, i.e., at differential pressure transmitter adapter tube away from
When from the length for being connected to inside pipe wall bottom, the differential pressure value of differential pressure transmitter A is that P is found according to the temperature of pipeline Crude Oil at that time
The density p of pure oil under relevant temperature0, bring established mathematical model calculation formula into, can obtain corresponding crude oil water content DM。
Because containing impurity such as a small amount of minerals in crude oil, when calculating the moisture content of crude oil, it is necessary to consider the reality of live crude oil
Border situation is modified calculated result using correction factor.
λ --- correction factor
DM--- quality moisture content
ρ0--- the density of pure oil
ρw--- the density of pure oil
H --- liquid level, i.e., the length of distance connection inside pipe wall bottom at differential pressure transmitter adapter tube
P --- liquid differential pressure value
G --- acceleration of gravity.
Invention additionally discloses a kind of oil well measurement methods, are applied to above-mentioned oil well measurement system；The oil well measurement method
Include:
After receiving enabling signal, the first solenoid valve and second solenoid valve are closed, control liquid inlet tee joint valve opens first
Second outlet is exported and closed, flows into oil in the first buffer by inlet tube and liquid inlet tee joint valve；
When the differential pressure signal that the second differential pressure transmitter received is sent indicates to generate pressure difference, determine that described first is temporary
Oil in device has risen to the position of the cross over pipe, and control liquid inlet tee joint valve opens second outlet and closes first outlet, makes
Oil is flowed into the second buffer by inlet tube and liquid inlet tee joint valve；
Opening the first solenoid valve is discharged the oil in the first buffer by the drain pipe；
When the differential pressure signal that the first differential pressure transmitter received is sent indicates no pressure difference, first buffer is determined
Interior oil discharge finishes, and closes the first solenoid valve；
After closing the first solenoid valve, when the differential pressure signal that the first differential pressure transmitter received is sent indicates to generate pressure difference
When, determine that the oil in second buffer has risen to the position of the cross over pipe, control liquid inlet tee joint valve is opened first and gone out
Mouth simultaneously closes second outlet, flows into oil in the first buffer by inlet tube and liquid inlet tee joint valve；
Opening second solenoid valve is discharged the oil in the second buffer by the drain pipe；
When the differential pressure signal that the second differential pressure transmitter received is sent indicates no pressure difference, second buffer is determined
Interior oil discharge finishes, and closes the second solenoid valve, to realize in the oil and the second buffer in the first buffer
The alternating metering of oil；
It repeats step and " when the differential pressure signal that the second differential pressure transmitter received is sent indicates to generate pressure difference, determines institute
State the position that the oil in the first buffer has risen to the cross over pipe, control liquid inlet tee joint valve opens second outlet and closes the
One outlet, flows into oil in the second buffer by inlet tube and liquid inlet tee joint valve " to step " when the second differential pressure received becomes
When the differential pressure signal for sending device to send indicates no pressure difference, determines that the oil discharge in second buffer finishes, close described second
Solenoid valve " repeatedly alternately measures the multiple of the oil in the oil and the second buffer in the first buffer to realize.
Optionally, oil well measurement method further include: obtain the gas flow values of the gas flowmeter detection in real time simultaneously
It is sent to computer；
After determining that the oil in first buffer has risen to the position of the cross over pipe, the first electromagnetism is being opened
Before the oil in the first buffer is discharged by the drain pipe in valve, further includes:
It obtains the pressure difference signal that first differential pressure transmitter detects and is sent to computer；
After determining that the oil in second buffer has risen to the position of the cross over pipe, the second electromagnetism is being opened
Before the oil in the second buffer is discharged by the drain pipe in valve, further includes:
It obtains the pressure difference signal that second differential pressure transmitter detects and is sent to computer.
The specific embodiment provided according to the present invention, the invention discloses following technical effects: oil disclosed in this invention
Two buffers are arranged in well metering system and method, and a cross over pipe is connected between two buffers, when one of them is temporary
When oil in storage is full, make another buffer of the oily automatic stream of excess enthalpy, and the flow direction for switching oil is protected to another buffer
When demonstrate,proving the discharge of the measurement and oil to one of buffer progress oil mass, makes the oil uninterruptedly flowed into that can not participate in measuring, have
Effect avoids the error during oil measurement, improves the accuracy of measuring.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (10)
1. a kind of oil well measurement system characterized by comprising inlet tube, drain pipe, liquid inlet tee joint valve, the first buffer,
Two buffers, liquid outlet threeway valve, appendix and cross over pipe；
The inlet communication of the outlet end of the inlet tube and the liquid inlet tee joint valve；The first outlet of the liquid inlet tee joint valve and the
The top inlet of one buffer is connected to, the top inlet of the second outlet of the liquid inlet tee joint valve and second buffer
Connection；First inlet communication of the bottom liquid outlet of first buffer and the liquid outlet threeway valve, second buffer
Bottom liquid outlet and the liquid outlet threeway valve the second inlet communication；The outlet of the liquid outlet threeway valve and the drain pipe
Liquid feeding end connection；First buffer is connected to by the cross over pipe with the top of second buffer；The appendix
One end is connected to the top of first buffer and second buffer, and the other end is connected to the drain pipe；
Only one outlet is in the open state at any time for the liquid inlet tee joint valve.
2. oil well measurement system according to claim 1, which is characterized in that the liquid inlet tee joint valve and the liquid outlet threeway
Valve is electric T-shaped valve；First entrance of the liquid outlet threeway valve is provided with the first solenoid valve, and first solenoid valve is used
In the on and off of the first import for controlling the liquid outlet threeway valve；Second entrance of the liquid outlet threeway valve is provided with
Two solenoid valves, the second solenoid valve are used to control the on and off of the second import of the liquid outlet threeway valve.
3. oil well measurement system according to claim 2, which is characterized in that be provided in the bottom of first buffer
First differential pressure transmitter is provided with the second differential pressure transmitter in the bottom of second buffer；First differential pressure transmitter
For detecting the liquid level or quality of liquid in first buffer；Second differential pressure transmitter is for detecting described second temporarily
The liquid level or quality of liquid in storage.
4. oil well measurement system according to claim 3, which is characterized in that be provided with gas flow on the appendix
Meter；The gas flowmeter is used to detect the gas flow in the appendix.
5. oil well measurement system according to claim 4, which is characterized in that further include PLC intelligence control system；It is described
The signal input part of PLC intelligence control system and first differential pressure transmitter, second differential pressure transmitter and the gas
Flowmeter connection, the control output end of the PLC intelligence control system and first solenoid valve, the second solenoid valve and
The liquid inlet tee joint valve connection；The PLC intelligence control system is used for according to first differential pressure transmitter and described second poor
The signal of pressure transmitter controls first solenoid valve, the control on and off of the second solenoid valve and the feed liquor three
The first outlet of port valve and second outlet it is on and off；It is also used to acquire the flow value of the gas flowmeter.
6. oil well measurement system according to claim 4, which is characterized in that it is unidirectional on the appendix to be provided with gas phase
Valve, the gas phase check valve are located at the downstream of the gas flowmeter；The gas phase check valve is for preventing in the appendix
Gas backflow.
7. oil well measurement system according to claim 1, which is characterized in that it is unidirectional on the drain pipe to be equipped with liquid phase
Valve, the liquid phase check valve are located at the upstream with the appendix connectivity part of the drain pipe；The liquid phase check valve is used for
Prevent the gas backflow in the appendix from entering in first buffer and second buffer.
8. oil well measurement system according to claim 5, which is characterized in that further include computer；The letter of the computer
Number input terminal is connect with the signal output end of the PLC intelligence control system, and PLC intelligence control system is used for the letter that will test
Number it is sent to the computer；The computer is for measuring fuel-displaced data.
9. a kind of oil well measurement method, which is characterized in that applied to the oil well meter as described in any one of claim 5 or 8
Amount system；The oil well measurement method includes:
After receiving enabling signal, the first solenoid valve and second solenoid valve are closed, control liquid inlet tee joint valve opens first outlet
And second outlet is closed, flow into oil in the first buffer by inlet tube and liquid inlet tee joint valve；
When the differential pressure signal that the second differential pressure transmitter received is sent indicates to generate pressure difference, determine in first buffer
Oil have risen to the position of the cross over pipe, control liquid inlet tee joint valve opens second outlet and simultaneously closes first outlet, keeps oil logical
It crosses inlet tube and liquid inlet tee joint valve flows into the second buffer；
Opening the first solenoid valve is discharged the oil in the first buffer by the drain pipe；
When the differential pressure signal that the first differential pressure transmitter received is sent indicates no pressure difference, determine in first buffer
Oil discharge finishes, and closes the first solenoid valve；
After closing the first solenoid valve, when the differential pressure signal that the first differential pressure transmitter received is sent indicates to generate pressure difference,
Determine that the oil in second buffer has risen to the position of the cross over pipe, control liquid inlet tee joint valve opens first outlet simultaneously
Second outlet is closed, flows into oil in the first buffer by inlet tube and liquid inlet tee joint valve；
Opening second solenoid valve is discharged the oil in the second buffer by the drain pipe；
When the differential pressure signal that the second differential pressure transmitter received is sent indicates no pressure difference, determine in second buffer
Oil discharge finishes, and closes the second solenoid valve, to realize to the oil in the oil and the second buffer in the first buffer
Alternately measure；
It repeats step and " when the differential pressure signal that the second differential pressure transmitter for receiving is sent indicates to generate pressure difference, determines described the
Oil in one buffer has risen to the position of the cross over pipe, and control liquid inlet tee joint valve opens second outlet and close first
Mouthful, flow into oil in the second buffer by inlet tube and liquid inlet tee joint valve " to step " when the second differential pressure transmitter received
When the differential pressure signal of transmission indicates no pressure difference, determines that the oil discharge in second buffer finishes, close second electromagnetism
Valve " repeatedly alternately measures the multiple of the oil in the oil and the second buffer in the first buffer to realize.
10. oil well measurement method according to claim 9, which is characterized in that further include: the gas flow is obtained in real time
It counts the gas flow values of detection and is sent to computer；
After determining that the oil in first buffer has risen to the position of the cross over pipe, make opening the first solenoid valve
Before oil in first buffer is discharged by the drain pipe, further includes:
It obtains the pressure difference signal that first differential pressure transmitter detects and is sent to computer；
After determining that the oil in second buffer has risen to the position of the cross over pipe, make opening second solenoid valve
Before oil in second buffer is discharged by the drain pipe, further includes:
It obtains the pressure difference signal that second differential pressure transmitter detects and is sent to computer.
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| CN115199258A (en) * | 2022-09-15 | 2022-10-18 | 四川凯创机电设备有限公司 | Metering well selection mixed transportation pry and metering control method thereof |
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