CN115199258A - Metering well selection mixed transportation pry and metering control method thereof - Google Patents
Metering well selection mixed transportation pry and metering control method thereof Download PDFInfo
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- CN115199258A CN115199258A CN202211119007.6A CN202211119007A CN115199258A CN 115199258 A CN115199258 A CN 115199258A CN 202211119007 A CN202211119007 A CN 202211119007A CN 115199258 A CN115199258 A CN 115199258A
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- 239000007788 liquid Substances 0.000 claims abstract description 141
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- 238000004519 manufacturing process Methods 0.000 claims abstract description 50
- 239000003129 oil well Substances 0.000 claims abstract description 48
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- 238000005259 measurement Methods 0.000 claims description 14
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- 238000009825 accumulation Methods 0.000 claims description 8
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- 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
- E21B47/00—Survey of boreholes or wells
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- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
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- 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
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Abstract
The invention relates to a metering well selection mixed transportation pry and a control metering method thereof, belonging to the technical field of oil well yield metering; comprises a well selecting valve group II; the device comprises an automatic metering device I, a liquid flow metering pipeline, a gas flow metering pipeline and a water content metering pipeline are formed by opening and closing corresponding valves; the device comprises a depressurization mixing conveying device III, a mixing conveying pump and a pressure reducing mixing conveying device II, wherein the mixing conveying pump is used for conveying media of a well group to depressurization; the metering manifold and the production manifold are respectively connected with the automatic metering device I, and the production manifold is also connected with the pressure reduction mixing and conveying device III. A control metering method for metering the well selection mixed transportation pry is also disclosed. The invention achieves the following beneficial effects: the structure is simplified, the required equipment is less, and the cost is greatly reduced; production and metering can be realized by switching the valves; and then through the switching of the valve, three metering conditions of liquid flow metering, gas flow metering and water content can be realized during metering, and the control is simpler.
Description
Technical Field
The invention relates to the technical field of oil well yield metering, in particular to a metering well selection mixed transportation pry and a control metering method thereof.
Background
With the development stage of the oil field and the national requirements on cost reduction, efficiency improvement and emission control, the oil field gradually cancels a first-level metering station, simplifies the ground construction process and reduces the investment of one-time station construction, which becomes the main trend of the oil field ground process construction.
The conventional oil field ground is built into that a plurality of oil wells are collected through a valve bank, then are heated and separated, and are respectively collected and conveyed to a centralized processing station through a gas pipeline and a liquid pipeline, or are conveyed to a large centralized processing station through an air compressor, a centrifugal pump and the like, meanwhile, a metering room is arranged at the collecting position of the plurality of oil wells, a metering separator is arranged in the metering room, and the accurate metering of a single well is realized through methods such as manual meter reading or timing. The metering and conveying mode needs to build 2 conveying pipelines respectively, and needs to invest equipment facilities such as a separator, a heating furnace, a metering room, a compressor, an external conveying pump and the like, so that the investment is large, the construction period is long, particularly in remote areas, the production and management cost is also large, and the metering and conveying mode is not suitable for the current international situation and the headquarter requirements on quality improvement and efficiency improvement.
The current emerging delivery methods are: the oil and gas are not separated and are conveyed by a mixing pump. However, if complicated working conditions are to be realized, cumbersome equipment and facilities, such as heating furnaces, metering chambers, etc., are required.
Based on the technical scheme, the company designs a metering well selection mixed transportation pry through long-term research on field construction and mixed transportation pumps and metering devices.
In addition, the separator M, the separator N and the valve between the separators M and the separator N form a structure for replacing a three-phase flow meter, and the same function is realized by low-cost design. The problem of because of the cost problem, can't use widely is solved.
The three-phase flow meter is a device for online measurement of oil output from a wellhead, and can accurately and automatically measure the yield parameters of oil wells such as liquid amount, gas amount, water content and the like. The only disadvantage is that the cost is high, the online measurement of each oil well can not be realized, and the popularization is difficult.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a metering well selection mixed transportation pry and a metering control method thereof, which have the advantages of simplified structure, less required equipment and greatly reduced cost; production and metering can be realized by switching the valves; and the three metering conditions of liquid flow metering, gas flow metering and water content metering can be realized during metering by switching the valve, so that the control is simpler.
The purpose of the invention is realized by the following technical scheme: a metering well selection mixed transportation pry and a control metering method thereof comprise the following steps:
the well selecting valve group II is provided with a plurality of electric three-way valves R, a first interface of each electric three-way valve R is connected with a single well pipeline, second interfaces of all the electric three-way valves R are connected to the same metering manifold, and third interfaces of all the electric three-way valves R are connected to the same production manifold;
the automatic metering device I is formed by opening and closing corresponding valves into a liquid flow metering pipeline, a gas flow metering pipeline and a water content metering pipeline;
the pressure reduction mixed conveying device III conveys the medium of the well group to pressure reduction through the mixed conveying pump;
the metering manifold and the production manifold are respectively connected with the automatic metering device I, and the production manifold is also connected with the pressure reduction mixing and conveying device III;
when metering is carried out, the single well pipeline, the automatic metering device I, the production manifold and the depressurization mixing transportation device III are sequentially connected;
when normal production is carried out, the single-well pipeline, the production manifold and the depressurization mixing transportation device III are sequentially connected.
Further, in the well selection valve group II: a plurality of bridge pipes are connected in parallel between the metering manifold and the production manifold, and an electric three-way valve R is arranged on each bridge pipe; one end of the metering manifold is connected to the automatic metering device I, and the other end of the metering manifold is plugged; one end of the production collecting pipe is connected to the automatic metering device I, the middle part of the production collecting pipe is connected with the pressure reduction mixed conveying device III, and the other end of the production collecting pipe is connected to the pressure reduction mixed conveying device III to form a bypass pipeline.
Further, in the depressurization mixing and transporting device III: the regulating valve S, the mixed transportation pump, the regulating valve T and the processing station are connected in sequence through pipelines; and the production collecting pipe is connected to a pipeline between the regulating valve T and the treatment station in the depressurization mixing and conveying device III through a bypass valve to form a bypass pipeline.
Further, in the automatic metering device i:
comprises a separator M and a separator N;
the metering inlet pipeline is formed by respectively connecting the upper part of the separator M, the upper part of the separator N and the metering inlet pipe to three ports of the three-way electromagnetic valve A through pipelines;
a metering outlet pipeline which is formed by respectively connecting the lower part of the separator M, the lower part of the separator N and a metering outlet pipe to three joints of the three-way electromagnetic valve B through pipelines;
the gas pipeline is connected with the top of the separator M, the electric explosion-proof ball valve C, the middle auxiliary pipe, the electric explosion-proof ball valve D and the top of the separator N through pipelines, and the middle auxiliary pipe is connected to the metering outlet pipe through a flow guide pipe;
and the metering inlet pipeline, the metering outlet pipeline and the gas circuit pipeline form pipelines in three functional states by controlling the opening and closing of corresponding valves, namely a liquid flow metering pipeline, a gas flow metering pipeline and a water content metering pipeline.
Further preferably, the separator M and the separator N are provided with parameter monitors, and the parameter monitors are connected with the RTU system through a control panel to realize data remote transmission; the control panel is provided with a timer; the parameter monitoring instrument comprises an oil-water interface instrument, a liquid level transmitter, a temperature transmitter and a pressure transmitter; the oil-water interface instrument is arranged in the corresponding separator; the liquid level transmitter is arranged on the side surface of the corresponding separator; the temperature transmitter is arranged on the corresponding separator; and the pressure transmitter is arranged on the air pipe line at the top of the corresponding separator.
Further preferably, when the automatic metering device I forms a liquid flow metering pipeline: the metering inlet pipe is communicated with the separator M and is closed with the separator N through a three-way electromagnetic valve A; the metering outlet pipe is communicated with the separator N and is closed with the separator M through a three-way electromagnetic valve B; and opening the electric explosion-proof ball valve C and closing the electric explosion-proof ball valve D, and communicating the separator M with the metering outlet pipe through the middle auxiliary pipe and the flow guide pipe.
In the liquid flow metering pipeline, fluid in an oil well enters a separator M through a metering inlet pipe and a three-way electromagnetic valve A; separating gas and liquid in the separator for the fluid in the oil well; and the gas flows to the metering outlet pipe through the gas pipeline, the middle auxiliary pipe and the flow guide pipe and is discharged; the liquid flow rate can be obtained by calculating the volume and time of the liquid in the separator M.
In the liquid flow rate measuring line, the liquid in the separator N is also discharged through the measuring outlet pipe.
Further as preferred: when automatic metering device I forms gas flow measurement pipeline: the metering inlet pipe is communicated with the separator M and closed with the separator N through a three-way electromagnetic valve A; the metering outlet pipe is communicated with the separator M and closed with the separator N through a three-way electromagnetic valve B; and closing the electric explosion-proof ball valve C and opening the electric explosion-proof ball valve D.
In the gas flow metering pipeline, fluid in an oil well enters a separator M through a metering inlet pipe and a three-way electromagnetic valve A; the fluid in the oil well is separated from gas and liquid in the separator M; and the liquid is discharged through a three-way electromagnetic valve and a metering outlet pipe; the gas flow conditions can be obtained by measuring the volume and time of the gas in the separator.
In addition, the gas in the separator N flows to a metering outlet pipe through the opening of the electric explosion-proof ball valve D, the middle auxiliary pipe and the flow guide pipe to be discharged.
Further preferably, when the automatic metering device I forms a water-containing metering pipeline: the metering inlet pipe is communicated with the separator N and closed with the separator M through a three-way electromagnetic valve A; the metering outlet pipe is communicated with the separator M and closed with the separator N through a three-way electromagnetic valve B; the separator N is communicated with the metering outlet pipe through the middle auxiliary pipe and the flow guide pipe by closing the electric explosion-proof ball valve C and opening the electric explosion-proof ball valve D.
In the water content metering pipeline, fluid in an oil well flows into the separator N through the three-way electromagnetic valve A, the fluid in the oil well is subjected to gas, water and oil separation, and the water content can be obtained by measuring the change condition of the water level within a certain time through the oil-water interface instrument.
A control metering method for metering a well selection mixed transportation pry comprises the following steps:
s1, when normal production is carried out, the metering manifold, the production manifold and the automatic metering device I are disconnected through the three-way electromagnetic valve A and the three-way electromagnetic valve B;
selecting a corresponding oil well, enabling oil gas in the oil well to flow into a production manifold through a single well pipeline and an electric three-way valve R, then pumping the oil gas to a pressure reduction station through a mixed delivery pump in a pressure reduction mixed delivery device III, and reducing pressure and discharging the oil gas;
s2, when metering is needed, the metering manifold is communicated with the automatic metering device I through the three-way electromagnetic valve A, and the metering manifold and the automatic metering device I are selectively disconnected or communicated through the three-way electromagnetic valve B according to specific metering conditions.
Further, in step S2:
s21, when the liquid flow metering pipeline works
a. Stage of accumulating liquid
At the moment, the air pressure pipeline of the separator M is communicated with the metering outlet pipe;
when fluid in an oil well flows into the separator M through the metering inlet pipe and the three-way electromagnetic valve A, the fluid is subjected to gas-liquid separation; the separated gas passes through the electric explosion-proof ball valve C, passes through the middle auxiliary pipe and the flow guide pipe, and is discharged from the metering outlet pipe; the separated liquid stays in the separator M to accumulate liquid;
b. metering phase
When the liquid level in the separator M is accumulated to the lower liquid level, a timer starts to count; when the liquid level in the separator M has accumulated to the upper level, the timing is ended; at this time, the gas is normally discharged;
at this time, the lower-lower liquid level difference Δ H is calculated, the volume V = Δ H · S of the liquid can be calculated from the inner surface cross-sectional area S of the separator M1, and the liquid flow rate of the oil well can be calculated by dividing the calculated liquid matrix by the time difference Δ t: QL = Δ H · S/Δ t;
s22, when the gas flow metering pipeline works:
a. stage of accumulating liquid
When fluid in an oil well flows into the separator M through the metering inlet pipe and the three-way electromagnetic valve A, the fluid is subjected to gas-liquid separation; the separated gas is discharged, and the separated liquid is gathered in the separator M; at the moment, the gas is discharged to a metering outlet pipe through an electric explosion-proof ball valve C;
b. metering phase
When the liquid level is accumulated to the upper liquid level, the timer starts to time; at this point, the gas line of separator M is closed; the gas separated from the fluid will accumulate in the separator M;
when the liquid level of the separator M is accumulated to a lower liquid level, timing is finished;
at this time, the volume V = Δ H · S of the gas can be calculated by calculating the difference Δ H between the upper and lower liquid levels and the inner surface cross-sectional area S of the separator M, and the liquid flow rate of the oil well can be calculated by dividing the calculated liquid matrix by the time difference Δ t: QG = Δ H · S/Δ t, the gas flow of the well under the standard condition can be calculated in a PVT gaseous state, the pressure is provided with specific parameters by a pressure transmitter on the separator M1, and the temperature is provided with parameters by a temperature transmitter on the separator M;
s23, when the water content metering pipeline works:
a. stage of accumulating liquid
The fluid in the oil well enters a separator N through a three-way electromagnetic valve A, and the fluid is separated into water, oil and gas; the separated gas is discharged from the metering outlet pipe through the electric explosion-proof ball valve D; the separated water and oil are accumulated in the separator N;
b. metering phase
b1, initial height measurement
When the liquid accumulation in the separator N reaches the lower liquid level, closing the fluid inlet of the separator M;
then the lower part of the separator N is communicated with the lower part of the separator M through a three-way electromagnetic valve B; because the water and the oil can naturally settle and stratify, the water can enter the separator M at the lower layer at the moment, and the liquid in the separator N naturally settles;
measuring settled oil-water interface by oil-water interface meter
And height of liquid level
；
b2, allowing the fluid in the oil well to enter a separator N through the three-way electromagnetic valve A, wherein the separator N is in a liquid accumulation state at the moment;
when the upper liquid level is reached, stopping the fluid from entering the separator N, and communicating the upper part of the separator M with the upper part of the separator N through a three-way electromagnetic valve A;
after the separator N naturally settles for a period of time, the liquid level in the separator N is measured again
Height of oil-water interface
；
At the moment, calculating the volume water content of the oil well:
it should be noted that the working conditions of the oil well to which the present invention is applied are: medium and low pressure ranging from 1MPa to 2.0 MPa; 5m 3 /d~100m 3 Medium and small displacement of/d, namely liquid volume; the water content is 10% -100% of medium and high water content.
It should be noted that the design idea of the present invention is as follows: the automatic well selecting valve group of the electric three-way valve R and the double-cylinder metering device (realizing the automatic metering of oil, gas, water and water) and the step-down output of the screw pump are adopted.
Further, for the automatic metering device i: by providing two separators for metering, i.e. separators M/N; one metering liquid amount and gas amount; the water content was measured by metering the oil-water interface after the other liquid had settled over a period of time. The two separators are respectively provided with a temperature transmitter and a pressure transmitter to accurately convert air quantity, and the flows of the two separators are realized by switching corresponding three-way electromagnetic valves A/B and electric explosion-proof ball valves C/D.
The invention has the following advantages:
(1) Through the arrangement of the production manifold, the metering manifold and the single well pipeline, the complexity of the pipeline is greatly reduced, different single wells can be selected for metering according to conditions, and the metering of liquid flow, gas flow and water content is realized for each single well;
compared with the traditional conveying pipeline, the system does not need equipment facilities such as a heating furnace, a metering room, a compressor, an external conveying pump and the like, has small investment and short construction period, and can greatly reduce the production and management cost particularly in remote areas;
(2) The general three-phase flow meter device is simplified, and a liquid flow metering pipeline, a gas flow metering pipeline and a water-containing metering pipeline are respectively formed by designing the structure and opening and closing corresponding valves, so that three processes are monitored, and the cost is reduced;
in addition, the scheme also solves the problem that the common three-phase flow meter device cannot realize the online measurement of each oil well;
(3) The metering outlet pipeline is connected with the gas pipeline through the middle auxiliary pipe and the guide pipe, so that the gas metering and water content metering effects can be realized simultaneously by the aid of the connection mode; the structure is simple;
(4) Simple structure for the fault rate is low.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of another embodiment of the present invention;
FIG. 3 is a schematic view of the automatic metering device of the present invention with the automatic metering device I removed;
FIG. 4 is a schematic structural view of a well selection valve set II
FIG. 5 is a schematic structural diagram of an automatic metering device I;
FIG. 6 is a schematic view of another angle of the automatic measuring device I;
FIG. 7 is a schematic structural view of the automatic metering device I without the three-way solenoid valve A and the metering inlet pipe;
FIG. 8 is a schematic view of the connection between the metering outlet line and the gas line in the automatic metering device I;
FIG. 9 is a schematic view of the structure of a metering outlet line in the automatic metering device I;
FIG. 10 is a schematic illustration of a media flow path of the present invention;
in the figure: i-an automatic metering device, 1-a separator M, 2-a separator N, 3-a three-way solenoid valve A, 4-a three-way solenoid valve B, 5-a metering inlet pipe, 6-a metering outlet pipe, 7-a middle auxiliary pipe, 8-a flow guide pipe, 9-a pressure transmitter, 10-a liquid level transmitter, 11-an electric explosion-proof ball valve C, 12-an electric explosion-proof ball valve D;
II, selecting a well valve group, 20-an electric three-way valve R, 21-a single well pipeline, 22-a metering manifold, 23-a production manifold and 24-a bridge pipe;
III, a pressure reduction mixing transportation device, 30, a mixing transportation pump, 31, regulating valves S and 32, T and 33 and a bypass valve.
Detailed Description
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following.
As shown in fig. 1 to 4 and 10, a metering well selection mixed conveying pry comprises a well selection valve group II, an automatic metering device I and a depressurization mixed conveying device III; the well selecting valve group II is provided with a plurality of electric three-way valves R20, a first interface of each electric three-way valve R20 is connected with a single well pipeline 21, second interfaces of all the electric three-way valves R20 are connected with the same metering manifold 22, and third interfaces of all the electric three-way valves R20 are connected with the same production manifold 23; in the automatic metering device I, a liquid flow metering pipeline, a gas flow metering pipeline and a water content metering pipeline are formed by opening and closing corresponding valves; in the pressure reduction mixing and conveying device III, conveying the medium of the well group to pressure reduction through a mixing and conveying pump 30; and the metering manifold 22 and the production manifold 23 are respectively connected with the automatic metering device I, and the production manifold 23 is also connected with the pressure reduction mixing transportation device III.
If the measurement is needed, the single well pipeline 21, the automatic metering device I, the production collecting pipe 23 and the pressure reduction mixing transportation device III are connected in sequence. If normal production is required, the single-well pipeline 21, the production header 23 and the depressurization mixing transportation device III are connected in sequence.
In this embodiment, the well selection valve group ii is provided with a metering manifold 22 and a production manifold 23, a plurality of bridge pipes 24 are connected in parallel between the metering manifold 22 and the production manifold 23, and the bridge pipes 24 are provided with electric three-way valves R20. And one end of the metering manifold 22 is connected to the upper part of the automatic metering device I, and the other end thereof is blocked. Meanwhile, one end of the production manifold 23 is connected to the lower part of the automatic metering device I, the middle part thereof is connected with the pressure reduction mixing transportation device III, and the other end thereof is connected to the pressure reduction mixing transportation device III to form a bypass pipeline.
In this embodiment, the pressure-reducing mixing and conveying apparatus iii is connected in sequence to a regulating valve S31, a mixing and conveying pump 30, a regulating valve T32, and a processing station via a pipeline.
Furthermore, the production header 23 is connected to a pipeline between the regulating valve T32 and the treatment station in the depressurization mixing transportation device III through a bypass valve 33 to form a bypass pipeline.
Optionally, as shown in fig. 5 to 9, a metering well selection mixed transportation pry is designed for the automatic metering device i.
Specifically, the automatic metering device I comprises a separator M1 and a separator N2, and further comprises a three-way electromagnetic valve A3, a three-way electromagnetic valve B4, an electric explosion-proof ball valve C11 and an electric explosion-proof ball valve D12;
the three-way electromagnetic valve A3 has three ports, wherein the first port is connected with the metering inlet pipe 5, the metering inlet pipe 5 is connected to the end of the metering header 22, the second port is connected to the upper part of the separator M1 through a pipeline, and the second port is connected to the upper part of the separator N2 through a pipeline, so that a metering inlet pipeline is formed;
wherein, the three-way electromagnetic valve B4 has three interfaces, the first interface of which is connected with the metering outlet pipe 6, the metering outlet pipe 6 is connected with the end of the production collecting pipe 23, the second interface of which is connected with the lower part of the separator N2 through a pipeline, and the third interface of which is connected with the lower part of the separator N2 through a pipeline, thus forming a metering outlet pipeline;
wherein, electronic explosion-proof ball valve C11, electronic explosion-proof ball valve D12 are assisted pipe 7 through the centre and are linked to each other, and the centre is assisted pipe 7 and is passed through honeycomb duct 8 and connect at measurement outlet pipe 6 to electronic explosion-proof ball valve C11 still passes through the pipe connection at separator M1's top, and electronic explosion-proof ball valve D12 still passes through the pipe connection at separator N2's top, has then formed the moisture measurement pipeline.
In this embodiment, the separator M1 and the separator N2 are provided with parameter monitors, and the parameter monitors are connected with the RTU system through a control panel to realize data remote transmission; and a timer is arranged on the control panel. In the scheme, the parameter monitoring instrument comprises an oil-water interface instrument, a liquid level transmitter 10, a temperature transmitter and a pressure transmitter 9; wherein the oil-water interface instrument is arranged in the corresponding separator; the liquid level transmitter 10 is arranged on the side surface of the corresponding separator; the temperature transmitter is arranged on the corresponding separator; the pressure transmitter 9 is arranged on the gas line at the top of the respective separator.
When the automatic metering device I works, the opening and closing of the corresponding valve on the automatic metering device I are controlled through the control panel, so that pipelines with three functional states, namely a liquid flow metering pipeline, a gas flow metering pipeline and a water content metering pipeline, are formed.
A control metering method for metering a well selection mixed transportation pry comprises the following steps:
s1, when normal production is carried out, the metering manifold 22 and the production manifold 23 are disconnected with the automatic metering device I through the three-way electromagnetic valve A3 and the three-way electromagnetic valve B4;
selecting a corresponding oil well, allowing oil gas in the oil well to flow into a production manifold 23 through a single well pipeline 21 and an electric three-way valve R20, and then sending the oil gas to a depressurization station through a mixed transportation pump 30 in a depressurization mixed transportation device III for depressurization and discharge;
s2, when metering is needed, the metering manifold 22 is communicated with the automatic metering device I through the three-way electromagnetic valve A3, and the metering manifold 22 and the automatic metering device I are selectively disconnected or communicated through the three-way electromagnetic valve B4 according to specific metering conditions.
(1) When forming the liquid flow metering line: a metering inlet pipe 5 is communicated with the separator M1 and closed with the separator N2 through a three-way electromagnetic valve A3; the metering outlet pipe 6 is communicated with the separator N2 and closed with the separator M1 through a three-way electromagnetic valve B4; and opening the electric explosion-proof ball valve C11 and closing the electric explosion-proof ball valve D12, and communicating the separator M1 with the metering outlet pipe 6 through the middle auxiliary pipe 7 and the flow guide pipe 8. ( However, this state does not continue in the whole process of liquid flow metering, and is only a metering stage; in the liquid loading stage, the electric explosion-proof ball valve C11 is opened )
In the liquid flow metering pipeline, fluid in an oil well enters a separator M1 through a metering inlet pipe 5 and a three-way electromagnetic valve A3; the fluid in the oil well is separated from gas and liquid in the separator M1; and the gas flows to the metering outlet pipe 6 through the gas pipeline, the middle auxiliary pipe 7 and the flow guide pipe 8 to be discharged; the liquid flow rate can be obtained by calculating the volume and time of the liquid in the separator M1.
In the liquid flow rate measuring line, the liquid in the separator N2 is also discharged through the measuring outlet pipe 6.
When the liquid flow metering pipeline is used for metering:
a. stage of accumulating liquid
At this time, the pneumatic line of the separator M1 is communicated with the metering outlet pipe 6;
when fluid in an oil well flows into the separator M1 through the metering inlet pipe 5 and the three-way electromagnetic valve A3, the fluid is subjected to gas-liquid separation; the separated gas passes through an electric explosion-proof ball valve C11, passes through a middle auxiliary pipe 7 and a flow guide pipe 8, and is discharged from a metering outlet pipe 6; the separated liquid stays in the separator M1 to accumulate liquid;
b. metering phase
When the liquid level in the separator M1 is accumulated to the lower liquid level, a timer starts to count; when the liquid level in the separator M1 is accumulated to the upper liquid level, the timing is ended; at this time, the gas is normally discharged;
at this time, the lower-lower liquid level difference Δ H is calculated, the volume V = Δ H · S of the liquid can be calculated from the inner surface cross-sectional area S of the separator M1, and the liquid flow rate of the oil well can be calculated by dividing the calculated liquid matrix by the time difference Δ t: QL = Δ H · S/Δ t.
(2) When forming the gas flow metering line: a metering inlet pipe 5 is communicated with the separator M1 and closed with the separator N2 through a three-way electromagnetic valve A3; the metering outlet pipe 6 is communicated with the separator M1 and closed with the separator N2 through a three-way electromagnetic valve B4; the electric explosion-proof ball valve C11 is closed, and the electric explosion-proof ball valve D12 is opened. ( However, this state does not continue in the whole process of liquid flow metering, and is only a metering stage; in the liquid loading stage, the electric explosion-proof ball valve C11 is opened )
In the gas flow metering pipeline, fluid in an oil well enters a separator M1 through a metering inlet pipe 5 and a three-way electromagnetic valve A3; the fluid in the oil well is separated from gas and liquid in the separator M1; and the liquid is discharged through a three-way electromagnetic valve B4 and a metering outlet pipe 6; by metering the volume and time of the gas in the separator M1, the gas flow conditions can be obtained.
The gas in the separator N2 flows through the electric explosion-proof ball valve D12, the intermediate auxiliary pipe 7, and the flow guide pipe 8 to the metering outlet pipe 6 and is discharged.
When the gas flow metering pipeline performs metering work:
a. stage of accumulating liquid
When fluid in an oil well flows into the separator M1 through the metering inlet pipe 5 and the three-way electromagnetic valve A3, the fluid is subjected to gas-liquid separation; the separated gas is discharged, and the separated liquid is collected in the separator M1; at the moment, the gas is discharged to the metering outlet pipe 6 through the electric explosion-proof ball valve C11;
b. metering phase
When the liquid level is accumulated to the upper liquid level, the timer starts to time; at this time, the gas line of separator M1 is closed; the gas separated from the fluid will accumulate in the separator M1;
when the liquid level of the separator M1 is accumulated to a lower liquid level, timing is finished;
at this time, the volume V = Δ H · S of the gas can be calculated by calculating the difference Δ H between the upper and lower liquid levels and the inner surface cross-sectional area S of the separator M1, and the liquid flow rate of the oil well can be calculated by dividing the calculated liquid matrix by the time difference Δ t: QG = Δ H · S/Δ t, the gas flow of the well under standard conditions can be calculated by PVT gaseous regime, the pressure is provided by the pressure transmitter 9 on the separator M1, and the temperature is provided by the temperature transmitter on the separator M1.
(3) When forming the aqueous metering line: a metering inlet pipe 5 is communicated with the separator N2 and closed with the separator M1 through a three-way electromagnetic valve A3; the metering outlet pipe 6 is communicated with the separator M1 and closed with the separator N2 through a three-way electromagnetic valve B4; the separator N2 is communicated with the metering outlet pipe 6 through the middle auxiliary pipe 7 and the flow guide pipe 8 by closing the electric explosion-proof ball valve C11 and opening the electric explosion-proof ball valve D12.
In the water content metering pipeline, fluid in an oil well flows into the separator N2 through the three-way electromagnetic valve A, the fluid in the oil well is subjected to gas, water and oil separation, and the water content can be obtained by measuring the change condition of the water level within a certain time through the oil-water interface instrument.
When the water content metering pipeline performs metering work:
a. stage of fluid accumulation
The fluid in the oil well enters a separator N2 through a three-way electromagnetic valve A3, and the fluid is separated into water, oil and gas; the separated gas is discharged from the metering outlet pipe 6 through an electric explosion-proof ball valve D12; the separated water and oil are accumulated in a separator N2;
b. metering phase
b1, initial height measurement
When the liquid accumulation in the separator N2 reaches the lower liquid level, closing the fluid inlet of the separator M1;
then the lower part of the separator N2 is communicated with the lower part of the separator M1 through a three-way electromagnetic valve B4; because the water and the oil can naturally settle and stratify, the water can enter the separator M1 at the lower layer at the moment, and the liquid in the separator N2 naturally settles;
measuring settled oil-water interface by oil-water interface meter
And height of liquid level
；
b2, allowing the fluid in the oil well to enter a separator N2 through a three-way electromagnetic valve A3, wherein the separator N2 is in a liquid accumulation state;
when the upper liquid level is reached, stopping the fluid from entering the separator N2, and communicating the upper part of the separator M1 with the upper part of the separator N2 through a three-way electromagnetic valve A3;
after the separator N2 naturally settles for a period of time, the liquid level in the separator N2 is measured again
Height of oil-water interface
；
And calculating the volume water content of the oil well at the moment:
in the above (1) to (3), when the gas flow rate measuring line is formed, and when the water content measuring line is formed, only the opening and closing of the just-measured stage are described in describing the opening and closing of the corresponding valve, and the opening and closing of the whole stage are not described in forming the gas flow rate measuring line, and forming the water content measuring line.
It should be noted that the control logic of the present solution is:
liquid loading of a separator M1: the three-way electromagnetic valve A3 is communicated with the separator M1, the three-way electromagnetic valve B4 is communicated with the separator N2, and the electric explosion-proof ball valve C11 on the gas line pipeline of the separator M1 is in an open state;
liquid loading in a separator N2: the three-way electromagnetic valve A3 is communicated with the separator N2, the three-way electromagnetic valve B4 is communicated with the separator M1, and the electric explosion-proof ball valve D12 on the gas line pipeline of the separator N2 is in an open state;
discharging liquid by a separator M1: the three-way electromagnetic valve A3 is communicated with the separator M1, the three-way electromagnetic valve B4 is communicated with the separator M1, and the electric explosion-proof ball valve C11 on the gas line pipeline of the separator M1 is in a closed state;
draining liquid by a separator N2: the three-way electromagnetic valve A3 is communicated with the separator M1, the three-way electromagnetic valve B4 is communicated with the separator N2, and the electric explosion-proof ball valve D12 on the gas line pipeline of the separator N2 is in a closed state;
separator M1 settling stage: the three-way electromagnetic valve A3 is communicated with the separator N2, the three-way electromagnetic valve B4 is communicated with the separator N2, and the electric explosion-proof ball valve C11 on the gas line pipeline of the separator M1 is in an open state;
separator N2 settling stage: the three-way electromagnetic valve A3 is communicated with the separator M1, the three-way electromagnetic valve B4 is communicated with the separator M1, and the electric explosion-proof ball valve D12 on the gas line pipeline of the separator N2 is in an open state;
it should be noted that, in this scheme, control panel sets up in the PLC switch board, and control panel links to each other with the RTU system. A timer is also arranged on the control panel; the level transmitter 10 is electrically connected to a timer via a control panel.
It should be noted that, in this scheme, level transmitter 10, oil-water interface appearance, pressure transmitter 9, temperature transmitter are 2 respectively to separator M1, separator N2 correspond 1 respectively.
It should be noted that the working conditions of the oil well to which the present invention is applied are: medium and low pressure ranging from 1MPa to 2.0 MPa; 5m 3 /d~100m 3 Medium and small displacement of/d, namely liquid volume; the water content is 10% -100% of medium and high water content.
The above examples only represent preferred embodiments, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. The utility model provides a measurement selection well defeated sled thoughtlessly which characterized in that: the method comprises the following steps:
a well selecting valve group II which is provided with a plurality of electric three-way valves R (20); a first connector of each electric three-way valve R (20) is connected with a single well pipeline (21), second connectors of all electric three-way valves R (20) are connected to the same metering manifold (22), and third connectors of all electric three-way valves R (20) are connected to the same production manifold (23);
the automatic metering device I is formed by opening and closing corresponding valves into a liquid flow metering pipeline, a gas flow metering pipeline and a water content metering pipeline;
the depressurization mixing and conveying device III conveys the medium of the well group to depressurization through a mixing and conveying pump (30);
the metering manifold (22) and the production manifold (23) are respectively connected with the automatic metering device I, and the production manifold (23) is also connected with the depressurization mixing and conveying device III;
when metering is carried out, the single-well pipeline (21), the automatic metering device I, the production manifold (23) and the depressurization mixing transportation device III are sequentially connected;
when normal production is carried out, the single-well pipeline (21), the production header (23) and the depressurization mixing transportation device III are connected in sequence.
2. The metering well selection mixing transportation pry as defined in claim 1, wherein: in the well selection valve group II:
a plurality of bridge pipes (24) are connected in parallel between the metering manifold (22) and the production manifold (23), and an electric three-way valve R (20) is arranged on each bridge pipe (24);
one end of the metering manifold (22) is connected to the automatic metering device I, and the other end of the metering manifold is blocked;
one end of the production collecting pipe (23) is connected with the automatic metering device I, the middle part of the production collecting pipe is connected with the pressure reduction mixing and conveying device III, and the other end of the production collecting pipe is connected with the pressure reduction mixing and conveying device III to form a bypass pipeline.
3. The metering well selection mixing conveying pry as claimed in claim 2, wherein: in the pressure-reducing mixed transportation device III:
the regulating valve S (31), the mixing and conveying pump (30), the regulating valve T (32) and the treatment station are connected in sequence through pipelines;
and the production header (23) is connected to a pipeline between the regulating valve T and the treatment station in the depressurization mixing transportation device III through a bypass valve (33) to form a bypass pipeline.
4. The metering well selection mixing transportation pry as defined in any one of claims 1~3, wherein: in the automatic metering device I:
comprises a separator M (1) and a separator N (2);
the metering inlet pipeline is formed by respectively connecting the upper part of the separator M (1), the upper part of the separator N (2) and the metering inlet pipe (5) to three interfaces of the three-way electromagnetic valve A (3) through pipelines;
a metering outlet pipeline which is formed by respectively connecting the lower part of the separator M (1), the lower part of the separator N (2) and a metering outlet pipe (6) to three joints of a three-way electromagnetic valve B (4) through pipelines;
the gas pipeline is connected with the top of the separator M (1), the electric explosion-proof ball valve C (11), the middle auxiliary pipe (7), the electric explosion-proof ball valve D (12) and the top of the separator N (2) through pipelines, and the middle auxiliary pipe (7) is connected with the metering outlet pipe (6) through the flow guide pipe (8) to form the gas pipeline;
and the metering inlet pipeline, the metering outlet pipeline and the gas circuit pipeline form pipelines in three functional states by controlling the opening and closing of corresponding valves, namely a liquid flow metering pipeline, a gas flow metering pipeline and a water content metering pipeline.
5. The metering well selection mixing transportation pry as defined in claim 4, wherein: the separator M (1) and the separator N (2) are provided with parameter monitors, and the parameter monitors are connected with the RTU system through a control panel to realize data remote transmission;
the control panel is provided with a timer;
the parameter monitoring instrument comprises an oil-water interface instrument, a liquid level transmitter (10), a temperature transmitter and a pressure transmitter (9);
the oil-water interface instrument is arranged in the corresponding separator;
the liquid level transmitter (10) is arranged on the side surface of the corresponding separator;
the temperature transmitter is arranged on the corresponding separator;
and the pressure transmitter (9) is arranged on the air pipe line at the top of the corresponding separator.
6. The metering well selection mixing conveying pry as defined in claim 4, wherein: when automatic metering device I forms liquid flow measurement pipeline:
a metering inlet pipe (5) is communicated with the separator M (1) and is closed with the separator N (2) through a three-way electromagnetic valve A (3);
a metering outlet pipe (6) is communicated with the separator N (2) and is closed with the separator M (1) through a three-way electromagnetic valve B (4);
and (3) opening the electric explosion-proof ball valve C (11) and closing the electric explosion-proof ball valve D (12), and communicating the separator M (1) with the metering outlet pipe (6) through the middle auxiliary pipe (7) and the flow guide pipe (8).
7. The metering well selection mixing transportation pry as defined in claim 4, wherein: when automatic metering device I forms gas flow measurement pipeline:
a metering inlet pipe (5) is communicated with the separator M (1) and is closed with the separator N (2) through a three-way electromagnetic valve A (3);
a metering outlet pipe (6) is communicated with the separator M (1) and closed with the separator N (2) through a three-way electromagnetic valve B (4);
and closing the electric explosion-proof ball valve C (11) and opening the electric explosion-proof ball valve D (12).
8. The metering well selection mixing transportation pry as defined in claim 4, wherein: when automatic metering device I forms the measurement pipeline that contains water:
a metering inlet pipe (5) is communicated with the separator N (2) and is closed with the separator M (1) through a three-way electromagnetic valve A (3);
a metering outlet pipe (6) is communicated with the separator M (1) and is closed with the separator N (2) through a three-way electromagnetic valve B (4);
the separator N (2) is communicated with the metering outlet pipe (6) through the middle auxiliary pipe (7) and the flow guide pipe (8) by closing the electric explosion-proof ball valve C (11) and opening the electric explosion-proof ball valve D (12).
9. A control metering method for metering a well selection mixed transportation pry is characterized by comprising the following steps: which comprises the following steps:
s1, when normal production is carried out, the metering manifold (22) and the production manifold (23) are disconnected with the automatic metering device I through the three-way electromagnetic valve A (3) and the three-way electromagnetic valve B (4);
selecting a corresponding oil well, allowing oil gas in the oil well to flow into a production manifold (23) through a single well pipeline (21) and an electric three-way valve R (20), and then sending the oil gas to a depressurization station through a mixed transportation pump (30) in a depressurization mixed transportation device III for depressurization and discharge;
s2, when the metering is needed, the metering manifold (22) is communicated with the automatic metering device I through the three-way electromagnetic valve A (3), and the metering manifold is disconnected or communicated with the automatic metering device I through the three-way electromagnetic valve B (4) according to specific metering conditions.
10. The control metering method for metering the well selection mixing transportation pry as claimed in claim 9, wherein the control metering method comprises the following steps: in the step S2:
s21, when the liquid flow metering pipeline works
a. Stage of accumulating liquid
At the moment, the air pressure pipeline of the separator M is communicated with the metering outlet pipe (6);
when fluid in an oil well flows into the separator M (1) through the metering inlet pipe (5) and the three-way electromagnetic valve A (3), the fluid is subjected to gas-liquid separation; the separated gas passes through an electric explosion-proof ball valve C (11), passes through a middle auxiliary pipe (7) and a guide pipe (8), and is discharged from a metering outlet pipe (6); the separated liquid stays in the separator M (1) for liquid accumulation;
b. metering phase
When the liquid level in the separator M (1) is accumulated to a lower liquid level, a timer starts to count; when the liquid level in the separator M (1) is accumulated to the upper level, the timing ends; at this time, the gas is normally discharged;
at this time, the lower-lower liquid level difference Δ H is calculated, the volume V = Δ H · S of the liquid can be calculated from the inner surface cross-sectional area S of the separator M1, and the liquid flow rate of the oil well can be calculated by dividing the calculated liquid matrix by the time difference Δ t: QL = Δ H · S/Δ t;
s22, when the gas flow metering pipeline works:
a. stage of accumulating liquid
When fluid in an oil well flows into the separator M (1) through the metering inlet pipe (5) and the three-way electromagnetic valve A (3), the fluid is subjected to gas-liquid separation; the separated gas is discharged and the separated liquid is collected in the separator M (1); at the moment, the gas is discharged to a metering outlet pipe (6) through an electric explosion-proof ball valve C (11);
b. metering phase
When the liquid level is accumulated to the upper liquid level, the timer starts to time; at this time, the gas line of separator M (1) is closed; the gas separated from the fluid will accumulate in the separator M (1);
when the liquid level of the separator M (1) is accumulated to a lower liquid level, the timing is ended;
at this time, the liquid level difference Δ H in the upper and lower directions is calculated, the volume V = Δ H · S of the gas is calculated from the inner surface cross-sectional area S of the separator M (1), and the liquid flow rate of the oil well is calculated by dividing the calculated liquid matrix by the time difference Δ t: QG = Δ H · S/Δ t, the gas flow of the well under the standard condition can be calculated in a PVT gaseous manner, the pressure is provided by a pressure transmitter (9) on the separator M1 with specific parameters, and the temperature is provided by a temperature transmitter on the separator M (1) with parameters;
s23, when the water content metering pipeline works:
a. stage of accumulating liquid
The fluid in the oil well enters a separator N (2) through a three-way electromagnetic valve A (3), and the fluid is separated into water, oil and gas; the separated gas is discharged from the metering outlet pipe (6) through an electric explosion-proof ball valve D (12); the separated water and oil are accumulated in the separator N (2);
b. metering phase
b1, initial height measurement
When the liquid accumulation in the separator N (2) reaches the lower liquid level, closing the fluid inlet of the separator M (1);
then the lower part of the separator N (2) is communicated with the lower part of the separator M (1) through a three-way electromagnetic valve B (4); because the water and the oil can naturally settle and stratify, the water can enter the separator M (1) at the lower layer at the moment, and the liquid in the separator N (2) naturally settles;
measuring settled oil-water interface by oil-water interface instrument
And height of liquid level
；
b2, allowing the fluid in the oil well to enter a separator N (2) through a three-way electromagnetic valve A (3), wherein the separator N (2) is in a liquid accumulation state;
when the upper liquid level is reached, stopping the fluid from entering the separator N (2), and communicating the upper part of the separator M (1) with the upper part of the separator N (2) through a three-way electromagnetic valve A (3);
after the separator N (2) settled naturally for a period of time, the liquid level in the separator N (2) was measured again
Height of oil-water interface
；
And calculating the volume water content of the oil well at the moment:
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