CN105927210B - Integrated automatic well selection metering device and multi-process automatic oil well yield metering method - Google Patents
Integrated automatic well selection metering device and multi-process automatic oil well yield metering method Download PDFInfo
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- CN105927210B CN105927210B CN201610477220.2A CN201610477220A CN105927210B CN 105927210 B CN105927210 B CN 105927210B CN 201610477220 A CN201610477220 A CN 201610477220A CN 105927210 B CN105927210 B CN 105927210B
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000003129 oil well Substances 0.000 title claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 332
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 239000007791 liquid phase Substances 0.000 claims description 110
- 239000012071 phase Substances 0.000 claims description 79
- 238000005259 measurement Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 238000013022 venting Methods 0.000 claims 3
- 238000010276 construction Methods 0.000 abstract description 18
- 238000009434 installation Methods 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000005465 channeling Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000001595 flow curve Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
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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
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Abstract
The invention relates to the technical field of oil well metering devices and methods, in particular to an integrated automatic well selection metering device and a multi-process automatic oil well yield metering method, wherein the integrated automatic well selection metering device comprises a multi-way valve, a vertical gas-liquid separator, a liquid discharge pump and an RTU; the multi-way valve is fixedly provided with a single-well metering liquid outlet pipeline, a multi-way valve liquid outlet pipe and at least one single-well oil collecting pipeline, the other end of the single-well metering liquid outlet pipeline is communicated with a feed inlet of the vertical gas-liquid separator, and the vertical gas-liquid separator is provided with a liquid level meter capable of monitoring the liquid level in the vertical gas-liquid separator. The invention has reasonable and compact structure, and the volumetric metering and the mass flowmeter metering are combined, so that the measuring range of the single-well liquid production metering is wider, the indirect metering and the instant metering can be carried out, and the metering accuracy is higher; meanwhile, the integrated automatic well selection metering device is arranged by adopting integrated skid mounting, so that the field construction and installation are convenient and quick, the construction amount is reduced, and the construction period is effectively shortened.
Description
Technical Field
The invention relates to the technical field of oil well metering devices and methods, in particular to an integrated automatic well selection metering device and a multi-process automatic oil well yield metering method.
Background
The metering station currently used in the oil field mainly adopts a construction mode that a multi-way valve or a well selection manifold is matched with a metering device; the measurement mainly adopts positive displacement measurement, and some oil fields in recent years select mass flow meter to measure the wellhead produced liquid, but because of the complexity of the actual production of oil fields, there are the following problems:
1. small measurable range and large limitation
The metering device used at present mainly adopts a metering mode of a volumetric type or a flowmeter, the volumetric metering is actually intermittent metering, liquid phase metering is carried out according to corresponding liquid level accumulated quantity in corresponding time variation and belongs to an average value of liquid quantity in a certain time, the liquid production quantity of a metering oil well is deduced from the average value, the curve relation of the flow quantity and the time is averaged under the metering mode, the instantaneous flow quantity cannot be reflected, the flow curve variation trend of a well mouth cannot be counted, the metering range is limited due to the influence of the volume of a metering container, and meanwhile, the water content of produced liquid cannot be detected.
And the metering mode of the flow meter is adopted: due to the limitation of the measuring range of the flowmeter, the measuring error is larger when the liquid production amount of the oil well exceeds the measuring range, but the problems of incapability of measuring, poor measuring accuracy and the like are caused by the larger change of the yield between wells and the yield of the same well in the actual production process of the oil well and the larger change of the yield of the same well in different production time, so that the measurement of the yield of the oil well is influenced.
2. The multi-way valve sledge and the metering sledge are separately constructed, the field construction work amount is large, and the construction period is long
At present, a multi-way valve sledge and a metering sledge purchased in a metering station are from different manufacturers, the manufacturers are independent of each other, a communication pipeline of two devices, a related instrument automatic control system and a power supply and distribution system need to be assembled and integrated on site by a user, and a strip foundation still needs to be manufactured on site at present for the multi-way valve device, so that the site construction engineering quantity is large, and the construction period is long.
Disclosure of Invention
The invention provides an integrated automatic well selection metering device and a multi-flow automatic oil well yield metering method, overcomes the defects of the prior art, and can effectively solve the problems of limited metering range, large measurement error and large field construction engineering quantity and long construction period caused by the separation of a multi-way valve sledge and a metering sledge in the current oil well liquid production metering mode.
One of the technical schemes of the invention is realized by the following measures: an integrated automatic well selection metering device comprises a multi-way valve, a vertical gas-liquid separator, a liquid discharge pump and an RTU; the multi-way valve is fixedly provided with a single-well metering liquid outlet pipeline, a multi-way valve liquid outlet pipe and at least one single-well oil collecting pipeline, the other end of the single-well metering liquid outlet pipeline is communicated with a feed inlet of the vertical gas-liquid separator, the vertical gas-liquid separator is provided with a liquid level meter capable of monitoring the liquid level in the vertical gas-liquid separator, the upper part of the vertical gas-liquid separator is communicated with a gas-phase metering discharge pipeline, the lower part of the vertical gas-liquid separator is communicated with a liquid-phase metering discharge pipeline, the other end of the liquid-phase metering discharge pipeline is communicated with the multi-way valve liquid outlet pipe, the gas-phase metering discharge pipeline is sequentially connected with a gas-phase electric valve, a vortex precession flow meter and a one-way valve in series, and a mass flow meter, a liquid-phase electric valve and the one-way valve are sequentially connected on the liquid-phase metering discharge pipeline in series; an auxiliary liquid discharge pipeline is connected in parallel between the liquid phase electric valve and the one-way valve and on the liquid phase metering discharge pipeline behind the one-way valve, a liquid discharge pump is connected in series on the auxiliary liquid discharge pipeline, and the liquid phase metering discharge pipeline behind the auxiliary liquid discharge pipeline is communicated with the gas phase metering discharge pipeline; the signal input part of the liquid level meter is electrically connected with the signal input part of the liquid level meter in the RTU, the signal input part of the liquid discharge pump is electrically connected with the signal output part of the liquid discharge pump in the RTU, the signal input part of the gas phase electric valve is electrically connected with the signal output part of the gas phase electric valve in the RTU, and the signal input part of the liquid phase electric valve is electrically connected with the signal output part of the liquid phase electric valve in the RTU.
The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:
the electric heating metering device further comprises a prying seat, a metering device room and an instrument automatic control room are arranged on the prying seat, the multi-way valve, the vertical gas-liquid separator and the liquid discharge pump are connected among the multi-way valve, the vertical gas-liquid separator and the liquid discharge pump, pipelines are connected among the multi-way valve, the vertical gas-liquid separator and the liquid discharge pump, the RTU is arranged among the instrument automatic control rooms, and an electric heater and a power supply control cabinet are further arranged in the instrument automatic control rooms.
The mechanical float valve is connected in series at the inlet of the gas phase metering discharge pipeline in front of the gas phase electric valve; or/and a blow-down pipeline communicated with the interior of the vertical gas-liquid separator is arranged at the bottom of the vertical gas-liquid separator, and a blow-down valve is connected on the blow-down pipeline in series; or/and a bypass pipeline is communicated between the single-well metering liquid outlet pipeline and the liquid phase metering discharge pipeline behind the liquid discharge pump, a bypass valve is connected in series on the bypass pipeline, and a ball valve is arranged on the single-well metering liquid outlet pipeline behind the bypass pipeline.
The top of the vertical gas-liquid separator is provided with a safety valve which can discharge the internal pressure of the vertical gas-liquid separator.
And a backpressure pipeline is communicated between the single-well metering liquid outlet pipeline and a liquid phase metering discharge pipeline behind the liquid discharge pump, and a backpressure valve is connected in series on the backpressure pipeline.
The second technical scheme of the invention is realized by the following measures: a method for automatically measuring the oil well yield in multiple processes by using an integrated automatic well selection measuring device is carried out according to the following steps: firstly, selecting a well through a multi-way valve, and allowing a single-well gas-liquid mixture to be metered to enter a vertical gas-liquid separator for gas-liquid separation to separate a gas phase and a liquid phase;
secondly, the separated liquid phase is pre-metered in a vertical gas-liquid separator, and meanwhile, a signal output end of a gas phase electric valve in the RTU transmits a signal of opening the gas phase electric valve to a signal input end of the gas phase electric valve, and the gas phase electric valve is opened;
thirdly, when the liquid phase to be measured is not less than the lower measurement limit of 3 tons/day, the control system in the RTU selects a large-flow measurement flow to measure: the signal output end of the liquid level meter transmits a signal to the signal input end of the liquid level meter in the RTU, after the signal is processed by a control system in the RTU, the signal output end of a liquid phase electric valve in the RTU transmits a signal of opening the liquid phase electric valve to the signal input end of the liquid level meter in the RTU, then the liquid phase electric valve is opened, a separated liquid phase is discharged through a liquid phase metering discharge pipeline and is metered by a mass flowmeter, a separated gas phase is discharged through a gas phase metering discharge pipeline and is metered by a vortex flowmeter, the metered liquid phase and the metered gas phase are mixed and then are discharged to a multi-way valve liquid outlet pipe and are mixed with other unmetered single-well gas-liquid mixtures in the multi-way valve liquid outlet pipe and then are discharged together, when the liquid level of the liquid level meter is reduced to 300mm, the signal output end of the liquid level meter transmits a signal to the signal input end of the liquid level meter in the RTU, after the signal is processed by the control system in the RTU, the signal output end of the liquid discharge pump in the RTU transmits a signal of the liquid discharge pump stopping working to the signal input end of the liquid discharge pump, and the liquid discharge pump stops working;
when the liquid phase metered is less than the lower metering limit of 3 tons/day: the signal output end of the liquid level meter transmits a signal to the signal input end of the liquid level meter in the RTU, after the signal is processed by a control system in the RTU, the signal output end of a liquid phase electric valve in the RTU transmits a signal of closing the liquid phase electric valve to the signal input end of the liquid phase electric valve, the liquid phase electric valve is closed, the continuously accumulated liquid level of the separated liquid phase in the vertical gas-liquid separator rises along with time, simultaneously the separated gas phase is discharged by a gas phase metering discharge pipeline and is metered by a vortex flowmeter, when the liquid level of the liquid level meter rises to 700mm, the signal output end of the liquid level meter transmits a signal to the signal input end of the liquid level meter in the RTU, after the signal is processed by the control system in the RTU, the signal output end of the gas phase electric valve in the RTU transmits a signal of closing the gas phase electric valve to the signal input end of the gas phase electric valve, the signal output end of the liquid phase electric valve in the RTU transmits a signal of closing the liquid phase electric valve to the signal input end of the liquid phase electric valve, and the signal output end of the liquid discharge pump in the RTU transmits a signal of starting operation of the liquid discharge pump to the signal input end of the liquid discharge pump, the gas phase electric valve is closed, the liquid phase electric valve is opened, the liquid discharge pump starts to work, the separated liquid phase is discharged through a liquid phase metering discharge pipeline, the separated gas phase is discharged through a gas phase metering discharge pipeline and is metered through a vortex flowmeter, the metered liquid phase and the metered gas phase are mixed and then discharged to a multi-way valve liquid outlet pipe and are mixed with other unmeasured single-well gas-liquid mixture in the multi-way valve liquid outlet pipe and then discharged together, when the liquid level of the liquid level meter is reduced to 300mm, the signal output end of the liquid level meter transmits a signal to the signal input end of a liquid level meter in the RTU, and after the liquid level is processed by a control system in the RTU, the signal output end of the liquid discharge pump in the RTU transmits a signal for stopping the liquid discharge pump to the signal input end of the liquid discharge pump, the liquid discharge pump stops working, and liquid discharge stops.
The following is further optimization or/and improvement of the second technical scheme of the invention:
when the control system in the RTU selects a large-flow metering flow to meter, in the process of discharging separated liquid phase, when the liquid level of the liquid level meter rises to 700mm of high liquid level, the signal output end of the liquid level meter transmits a signal to the signal input end of the liquid level meter in the RTU, after the liquid level is processed by the control system in the RTU, the signal of the signal output end of the liquid level meter in the RTU, which starts the operation of the liquid discharge pump, is transmitted to the signal input end of the liquid discharge pump, the liquid discharge pump starts to operate to perform auxiliary liquid discharge, when the liquid level of the liquid level meter is reduced to 300mm, the signal output end of the liquid level meter transmits a signal to the signal input end of the liquid level meter in the RTU, and after the processing by the control system in the RTU, the signal of the signal output end of the liquid discharge pump in the RTU, which stops the operation of the liquid discharge pump, is transmitted to the signal input end of the liquid discharge pump.
The invention has reasonable and compact structure, and the volumetric metering and the mass flowmeter metering are combined, so that the measuring range of the single-well liquid production metering is wider, the indirect metering and the instant metering can be carried out, and the metering accuracy is higher; meanwhile, the integrated automatic well selection metering device is arranged by adopting integrated skid mounting, so that the field construction and installation are convenient and quick, the construction amount is reduced, and the construction period is effectively shortened.
Drawings
FIG. 1 is a schematic diagram of the process flow structure of the present invention.
Fig. 2 is a schematic front view of the embodiment of the present invention.
Fig. 3 is a schematic top view of an embodiment of the present invention.
The codes in the figures are respectively: the system comprises a multi-way valve 1, a single-well metering liquid outlet pipeline 2, a multi-way valve liquid outlet pipe 3, a single-well oil collecting pipeline 4, a vertical gas-liquid separator 5, a liquid level meter 6, a gas-phase metering discharge pipeline 7, a liquid-phase metering discharge pipeline 8, a gas-phase electric valve 9, a precession vortex flowmeter 10, a one-way valve 11, a mass flowmeter 12, a liquid-phase electric valve 13, an auxiliary liquid discharge pipeline 14, a liquid discharge pump 15, an RTU16, a pry seat 17, a metering device room 18, an automatic control room 19, an electric heater 20, a power control cabinet 21, a blowdown pipeline 22, a blowdown valve 23, a bypass pipeline 24, a bypass valve 25, a ball valve 26, a backpressure pipeline 27, a backpressure valve 28 and a safety valve 29.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of up, down, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification. RTUs are known in the art.
The invention is further described below with reference to the following examples and figures:
as shown in the attached fig. 1, 2 and 3, the integrated automatic well selection metering device comprises a multi-way valve 1, a vertical gas-liquid separator 5, a drain pump 15 and an RTU16; the multi-way valve 1 is fixedly provided with a single-well metering liquid outlet pipeline 2, a multi-way valve liquid outlet pipe 3 and at least one single-well oil collecting pipeline 4, the other end of the single-well metering liquid outlet pipeline 2 is communicated with a feed inlet of a vertical gas-liquid separator 5, a liquid level meter 6 capable of monitoring the liquid level in the vertical gas-liquid separator 5 is arranged on the vertical gas-liquid separator 5, the upper part of the vertical gas-liquid separator 5 is communicated with a gas-phase metering discharge pipeline 7, the lower part of the vertical gas-liquid separator 5 is communicated with a liquid-phase metering discharge pipeline 8, the other end of the liquid-phase metering discharge pipeline 8 is communicated with the multi-way valve liquid outlet pipe 3, the gas-phase metering discharge pipeline 7 is sequentially connected with a gas-phase electric valve 9, a precession vortex flowmeter 10 and a one-way valve 11, and the liquid-phase metering discharge pipeline 8 is sequentially connected with a mass flowmeter 12, a liquid-phase electric valve 13 and a one-way valve 11; an auxiliary liquid discharge pipeline 14 is connected in parallel between the liquid phase electric valve 13 and the check valve 11 and on the liquid phase metering discharge pipeline 8 behind the check valve 11, a liquid discharge pump 15 is connected in series on the auxiliary liquid discharge pipeline 14, and the liquid phase metering discharge pipeline 8 behind the auxiliary liquid discharge pipeline 14 is communicated with the gas phase metering discharge pipeline 7; the signal input part of level gauge 6 and the signal input part electric connection of level gauge in the RTU16 are in the same place, and the signal input part of positive displacement pump 15 and the signal output part electric connection of positive displacement pump in the RTU16 are in the same place, and the signal input part of gaseous motorised valve 9 and the signal output part electric connection of gaseous motorised valve in the RTU16 are in the same place, and the signal input part of liquid phase motorised valve 13 and the signal output part electric connection of liquid phase motorised valve in the RTU16 are in the same place. RTU16 is known in the art.
The integrated automatic well selection metering device can be further optimized or/and improved according to actual needs:
as shown in the attached figures 2 and 3, the automatic control system further comprises a prying seat 17, a metering device room 18 and an instrument automatic control room 19 are arranged on the prying seat 17, the multi-way valve 1, the vertical gas-liquid separator 5 and the liquid discharge pump 15 are connected through pipelines which are arranged between the metering device room 18 and the instrument automatic control room 15, the RTU16 is arranged in the instrument automatic control room 19, and an electric heater 20 and a power supply control cabinet 21 are further arranged in the instrument automatic control room 19. The RTU16, the electric heater 20 and the power supply control cabinet 21 are arranged according to specific implementation operation requirements; the skid-mounted setting integrates, can effectively solve present multi-ported valve sledge and the detached problem of measurement sledge, and site operation simple to operate is swift, reduces the construction volume, effectively shortens construction cycle.
As shown in the attached fig. 1, 2 and 3, a mechanical float valve is connected in series at the inlet of a gas phase metering and discharging pipeline 7 before a gas phase electric valve 9; or/and a blow-down pipeline 22 communicated with the interior of the vertical gas-liquid separator 5 is arranged at the bottom of the vertical gas-liquid separator 5, and a blow-down valve 23 is connected on the blow-down pipeline 22 in series; or/and a bypass pipeline 24 is communicated between the single-well metering liquid outlet pipeline 2 and the liquid phase metering discharge pipeline 8 behind the liquid discharge pump 15, a bypass valve 25 is connected in series on the bypass pipeline 24, and a ball valve 26 is arranged on the single-well metering liquid outlet pipeline 2 behind the bypass pipeline 24. If the measured single-well liquid production amount has large fluctuation, when the liquid level rises to be close to a gas phase outlet, the mechanical float valve can be automatically closed, the phenomenon of gas line liquid channeling caused by overhigh liquid level is prevented, and meanwhile, the defects that the gas phase electric valve is slow in reaction time and cannot be closed in time due to the fact that the instantaneous liquid amount is increased can be overcome; when the vertical gas-liquid separator 5 is overhauled or cleaned, the blow-off valve is opened, and dirt in the vertical gas-liquid separator 5 can be discharged through the blow-off pipeline 22; when the vertical gas-liquid separator needs to be overhauled, the ball valve 26 on the single-well metering liquid outlet pipeline 2 is closed, single-well incoming liquid is discharged through the bypass pipeline 24 and the multi-way valve liquid outlet pipe 3, and the vertical gas-liquid separator 5 can be safely overhauled.
As shown in fig. 1, 2, and 3, a relief valve 29 capable of releasing the internal pressure of the vertical gas-liquid separator 5 is provided at the top of the vertical gas-liquid separator 5. When the internal pressure of the vertical gas-liquid separator 5 is too high, the safety valve 29 is automatically opened to release the pressure, so that the safety operation is guaranteed.
As shown in fig. 1 and 2, a backpressure pipeline 27 is communicated between the single-well metering liquid outlet pipeline 2 and the liquid phase metering discharge pipeline 8 behind the liquid discharge pump 15, and a backpressure valve 28 is connected in series to the backpressure pipeline 27. The opening pressure setting value of the back pressure valve 28 is slightly higher than the tripping pressure of the safety valve 29 of the vertical gas-liquid separator 5, when the gas quantity in the vertical gas-liquid separator 5 is increased instantly to cause the pressure in the container to be overlarge, the back pressure valve 28 is automatically opened, the pressure of the vertical gas-liquid separator 5 can be relieved through the back pressure pipeline 27, and the safety of the vertical gas-liquid separator 5 is ensured.
As shown in the attached figures 1, 2 and 3, the method for automatically metering the oil well production by multiple processes by using the integrated automatic well selection metering device of the embodiment comprises the following steps: firstly, selecting a well through a multi-way valve 1, and allowing a single-well gas-liquid mixture to be metered to enter a vertical gas-liquid separator 5 for gas-liquid separation to separate a gas phase and a liquid phase;
secondly, the separated liquid phase is pre-metered in the vertical gas-liquid separator 5, meanwhile, the signal output end of the gas phase electric valve in the RTU16 transmits the opening signal of the gas phase electric valve 9 to the signal input end of the gas phase electric valve 9, and the gas phase electric valve 9 is opened;
thirdly, when the liquid phase to be measured is not less than the lower measurement limit of 3 tons/day, the control system in the RTU16 selects a large-flow measurement flow to measure: the signal output end of the liquid level meter 6 transmits a signal to the signal input end of a liquid level meter in an RTU16, after the signal is processed by a control system in the RTU16, the signal output end of a liquid phase electric valve in the RTU16 transmits a signal of opening the liquid phase electric valve 13 to the signal input end of the liquid phase electric valve 13, then the liquid phase electric valve 13 is opened, a separated liquid phase is discharged through a liquid phase metering discharge pipeline 8 and is metered by a mass flowmeter 12, a separated gas phase is discharged through a gas phase metering discharge pipeline 7 and is metered by a precession vortex flowmeter 10, the metered liquid phase and the metered gas phase are mixed and then are discharged to a multi-way valve liquid outlet pipe 3 and are mixed with other unmetered single-well gas-liquid mixtures in the multi-way valve liquid outlet pipe 3 and then are discharged together, when the liquid level of the liquid level meter 6 is reduced to 300mm, the signal output end of the liquid level meter 6 transmits a signal to the signal input end of the liquid level meter in the RTU16, after the processing of the control system in the RTU16, the signal output end of a liquid discharge pump in the RTU16 transmits a signal of the liquid discharge pump 15 to the signal input end of the liquid discharge pump 15, and the signal input end of the liquid discharge pump 15 stops working, and the pump 15 stops working;
when the liquid phase metered is less than the lower metering limit of 3 tons/day: the signal output end of the liquid level meter 6 transmits a signal to the signal input end of a liquid level meter in the RTU16, after the processing of a control system in the RTU16, the signal output end of a liquid phase electric valve in the RTU16 transmits a signal of closing the liquid phase electric valve 13 to the signal input end of the liquid phase electric valve 13, the liquid phase electric valve 13 is closed, the continuously accumulated liquid level of the separated liquid phase in the vertical gas-liquid separator 5 rises along with the time, simultaneously the separated gas phase is discharged by a gas phase metering discharge pipeline 7 and is metered by a precession vortex flowmeter 10, when the liquid level of the liquid level meter 6 rises to 700mm high liquid level, the signal output end of the liquid level meter 6 transmits a signal to the signal input end of the liquid level meter in the RTU16, after the processing of the control system in the RTU16, the signal output end of the gas phase electric valve in the RTU16 transmits a signal of closing the gas phase electric valve 9 to the signal input end of the gas phase electric valve 9, the signal output end of the liquid phase electric valve in the RTU16 transmits a signal of closing the liquid phase electric valve 13 to the signal input end of the liquid phase electric valve 13, the signal output end of the liquid discharge pump in the RTU16 transmits a signal of starting the liquid discharge pump 15 to the signal input end of the liquid discharge pump 15, the gas phase electric valve 9 is closed, the liquid phase electric valve 13 is opened, the liquid discharge pump 15 starts to work, the separated liquid phase is discharged through the liquid phase metering discharge pipeline 8, the separated gas phase is discharged through the gas phase metering discharge pipeline 7 and is metered through the screw-in vortex flowmeter 10, the metered liquid phase and the metered gas phase are mixed and then discharged to the multi-way valve liquid outlet pipe 3 and are mixed with other unmetered single-well gas-liquid mixture in the multi-way valve liquid outlet pipe 3, when the liquid level of the liquid level meter 6 is reduced to 300mm, the signal output end of the liquid level meter 6 transmits a signal to the signal input end of the liquid level meter in the RTU16, and is processed by a control system in the RTU16, in RTU16, a signal for stopping operation of discharge pump 15 at the signal output terminal of the discharge pump is transmitted to the signal input terminal of discharge pump 15, and discharge pump 15 stops operating and stops discharging. The method for automatically metering the oil well output in multiple processes by adopting the integrated automatic well selection metering device solves the problems of small effective metering range, large metering error caused by fluctuation of oil well liquid production and the like of the conventional metering device, combines volumetric metering and mass flowmeter metering, and ensures that the single well liquid production metering range is wider, namely indirect metering and instant metering can be carried out, and the metering accuracy is higher
The method for automatically metering the oil well yield of the multi-process can be further optimized or/and improved according to actual needs:
according to the requirement, when a control system in the RTU selects a large flow metering process for metering, in the process of discharging separated liquid phase, when the liquid level of the liquid level meter 6 rises to 700mm high, the signal output end of the liquid level meter 6 transmits a signal to the signal input end of the liquid level meter in the RTU16, after the separated liquid phase is processed by the control system in the RTU16, the signal of the signal output end of the liquid level meter in the RTU16, which starts the operation of the liquid discharge pump 15, is transmitted to the signal input end of the liquid discharge pump 15, the liquid discharge pump 15 starts to operate for auxiliary liquid discharge, when the liquid level of the liquid level meter 6 drops to 300mm, the signal output end of the liquid level meter 6 transmits a signal to the signal input end of the liquid level meter in the RTU16, after the separated liquid level is processed by the control system in the RTU16, the signal of the signal output end of the liquid discharge pump in the RTU16, which stops the operation of the liquid discharge pump 15, is transmitted to the signal input end of the liquid discharge pump 15, and the liquid discharge pump 15 stops operating.
The liquid level of the liquid level meter 6 is expressed by taking the liquid level meter 6 arranged on the vertical gas-liquid separator 5 with the diameter of 400mm and the height of 1800mm as reference, and in practical application, the requirements of different conditions are met mainly by specific working conditions, but the liquid level is within the protection scope of the technical scheme.
The method for automatically metering the oil well output in multiple processes by adopting the integrated automatic well selection metering device solves the problems of small effective metering range, large metering error caused by fluctuation of oil well liquid production and the like of the existing metering device, combines volumetric metering and mass flowmeter metering, and ensures that the single well liquid production metering range is wider, namely indirect metering can be carried out, instant metering can also be carried out, and the metering accuracy is higher; meanwhile, the integrated automatic well selection metering device disclosed by the invention adopts an integrated skid-mounted arrangement, the problem that the existing multi-way valve skid is separated from the metering skid can be effectively solved, the field construction and installation are convenient and quick, the construction amount is reduced, and the construction period is effectively shortened.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (10)
1. A method for multi-flow automatic metering oil well yield comprises an integrated automatic well selection metering device, wherein the integrated automatic well selection metering device comprises a multi-way valve, a vertical gas-liquid separator, a liquid discharge pump and an RTU; the multi-way valve is fixedly provided with a single-well metering liquid outlet pipeline, a multi-way valve liquid outlet pipe and at least one single-well oil collecting pipeline, the other end of the single-well metering liquid outlet pipeline is communicated with a feed inlet of the vertical gas-liquid separator, the vertical gas-liquid separator is provided with a liquid level meter capable of monitoring the liquid level in the vertical gas-liquid separator, the upper part of the vertical gas-liquid separator is communicated with a gas-phase metering discharge pipeline, the lower part of the vertical gas-liquid separator is communicated with a liquid-phase metering discharge pipeline, the other end of the liquid-phase metering discharge pipeline is communicated with the multi-way valve liquid outlet pipe, the gas-phase metering discharge pipeline is sequentially connected with a gas-phase electric valve, a vortex precession flow meter and a one-way valve in series, and a mass flow meter, a liquid-phase electric valve and the one-way valve are sequentially connected on the liquid-phase metering discharge pipeline in series; an auxiliary liquid discharge pipeline is connected in parallel between the liquid phase electric valve and the one-way valve and on the liquid phase metering discharge pipeline behind the one-way valve, a liquid discharge pump is connected in series on the auxiliary liquid discharge pipeline, and the liquid phase metering discharge pipeline behind the auxiliary liquid discharge pipeline is communicated with the gas phase metering discharge pipeline; the signal output end of the liquid level meter is electrically connected with the signal input end of the liquid level meter in the RTU, the signal input end of the liquid discharge pump is electrically connected with the signal output end of the liquid discharge pump in the RTU, the signal input end of the gas-phase electric valve is electrically connected with the signal output end of the gas-phase electric valve in the RTU, and the signal input end of the liquid-phase electric valve is electrically connected with the signal output end of the liquid-phase electric valve in the RTU;
the method is characterized by comprising the following steps: firstly, selecting a well by a multi-way valve for producing a gas-liquid mixture from an oil well, and enabling the selected single-well gas-liquid mixture needing to be measured to enter a vertical gas-liquid separator for gas-liquid separation to separate a gas phase and a liquid phase; secondly, the separated liquid phase is pre-metered in a vertical gas-liquid separator, meanwhile, a signal output end of a gas-phase electric valve in the RTU transmits a signal of opening the gas-phase electric valve to a signal input end of the gas-phase electric valve, and the gas-phase electric valve is opened;
thirdly, when the liquid phase to be measured is not less than the lower measurement limit of 3 tons/day, the control system in the RTU selects a large flow measurement flow to carry out measurement: the signal output end of the liquid level meter transmits a signal to the signal input end of a liquid level meter in an RTU, after the signal is processed by a control system in the RTU, the signal output end of a liquid phase electric valve in the RTU transmits a signal of opening the liquid phase electric valve to the signal input end of the liquid phase electric valve, then the liquid phase electric valve is opened, a separated liquid phase is discharged through a liquid phase metering discharge pipeline and is metered by a mass flowmeter, a separated gas phase is discharged through a gas phase metering discharge pipeline and is metered by a vortex flowmeter, the metered liquid phase and the metered gas phase are mixed and then discharged to a multi-way valve liquid outlet pipe and are mixed with other unmetered single-well gas-liquid mixtures in the multi-way valve liquid outlet pipe and then discharged together, when the liquid level of the liquid level meter is reduced to 300mm, the signal output end of the liquid level meter transmits the signal to the signal input end of the liquid level meter in the RTU, after the signal is processed by the control system in the RTU, the signal output end of a liquid discharge pump in the RTU transmits a signal of the liquid discharge pump stopping working to the signal input end of the liquid discharge pump, and the liquid discharge pump stops working;
when the metered liquid phase is less than the lower metering limit of 3 tons/day: the signal output end of the liquid level meter transmits a signal to the signal input end of the liquid level meter in the RTU, after the signal is processed by a control system in the RTU, the signal output end of a liquid phase electric valve in the RTU transmits a signal of closing the liquid phase electric valve to the signal input end of the liquid phase electric valve, the liquid phase electric valve is closed, the continuously accumulated liquid level of the separated liquid phase in the vertical gas-liquid separator rises along with time, simultaneously the separated gas phase is discharged by a gas phase metering discharge pipeline and is metered by a vortex flowmeter, when the liquid level of the liquid level meter rises to 700mm, the signal output end of the liquid level meter transmits a signal to the signal input end of the liquid level meter in the RTU, after the signal is processed by the control system in the RTU, the signal output end of the gas phase electric valve in the RTU transmits a signal of closing the gas phase electric valve to the signal input end of the gas phase electric valve, the signal output end of the liquid phase electric valve in the RTU transmits a signal of closing the liquid phase electric valve to the signal input end of the liquid phase electric valve, and the signal output end of the liquid discharge pump in the RTU transmits a signal of starting operation of the liquid discharge pump to the signal input end of the liquid discharge pump, the gas phase electric valve is closed, the liquid phase electric valve is opened, the liquid discharge pump starts to work, the separated liquid phase is discharged through a liquid phase metering discharge pipeline, the separated gas phase is discharged through a gas phase metering discharge pipeline and is metered through a vortex flowmeter, the metered liquid phase and the metered gas phase are mixed and then discharged to a multi-way valve liquid outlet pipe and are mixed with other unmeasured single-well gas-liquid mixture in the multi-way valve liquid outlet pipe and then discharged together, when the liquid level of the liquid level meter is reduced to 300mm, the signal output end of the liquid level meter transmits a signal to the signal input end of a liquid level meter in the RTU, and after the liquid level is processed by a control system in the RTU, the signal output end of the liquid discharge pump in the RTU transmits a signal for stopping the liquid discharge pump to the signal input end of the liquid discharge pump, the liquid discharge pump stops working, and liquid discharge stops.
2. The method according to claim 1, wherein when the control system in the RTU selects the high flow metering process for metering, and during the process of discharging the separated liquid phase, when the liquid level of the liquid level gauge rises to 700mm, the signal output terminal of the liquid level gauge transmits a signal to the signal input terminal of the liquid level gauge in the RTU, and after the processing of the control system in the RTU, the signal of the signal output terminal of the liquid level gauge in the RTU for starting the operation of the liquid discharge pump is transmitted to the signal input terminal of the liquid discharge pump, and the liquid discharge pump starts to operate for auxiliary liquid discharge, and when the liquid level of the liquid level gauge falls to 300mm, the signal output terminal of the liquid level gauge transmits a signal to the signal input terminal of the liquid level gauge in the RTU, and after the processing of the control system in the RTU, the signal output terminal of the liquid discharge pump for stopping the operation of the liquid discharge pump is transmitted to the signal input terminal of the liquid discharge pump, and the liquid discharge pump stops operating.
3. The method of multi-process automatic metering oil well production according to claim 1 or 2, characterized by further comprising a prying seat, wherein the prying seat is provided with a metering device room and an instrument automatic control room, the multi-way valve, the vertical gas-liquid separator and the liquid discharge pump and pipelines connected therebetween are all arranged between the metering devices, the RTU is arranged between the instrument automatic control rooms, and the instrument automatic control rooms are also internally provided with electric heaters and power supply control cabinets.
4. The method of multi-process automatic metering oil well production according to claim 1 or 2, characterized in that a mechanical float valve is connected in series at the inlet of the gas phase metering discharge pipeline before the gas phase electric valve; or/and a blow-down pipeline communicated with the interior of the vertical gas-liquid separator is arranged at the bottom of the vertical gas-liquid separator, and a blow-down valve is connected on the blow-down pipeline in series; or/and a bypass pipeline is communicated between the single-well metering liquid outlet pipeline and the liquid phase metering discharge pipeline behind the liquid discharge pump, a bypass valve is connected in series on the bypass pipeline, and a ball valve is arranged on the single-well metering liquid outlet pipeline behind the bypass pipeline.
5. The method of claim 3, wherein a mechanical float valve is connected in series to the inlet of the gas phase metering discharge line before the gas phase electric valve; or/and a blow-down pipeline communicated with the interior of the vertical gas-liquid separator is arranged at the bottom of the vertical gas-liquid separator, and a blow-down valve is connected on the blow-down pipeline in series; or/and a bypass pipeline is communicated between the single-well metering liquid outlet pipeline and the liquid phase metering discharge pipeline behind the liquid discharge pump, a bypass valve is connected in series on the bypass pipeline, and a ball valve is arranged on the single-well metering liquid outlet pipeline behind the bypass pipeline.
6. The method for multi-pass automatic metering of oil well production according to claim 1 or 2 or 5, characterized in that the top of the vertical gas-liquid separator is provided with a safety valve capable of venting the pressure inside the vertical gas-liquid separator.
7. The method for multi-pass automatic metering of oil well production according to claim 3, characterized in that the top of the vertical gas-liquid separator is provided with a safety valve capable of venting the pressure inside the vertical gas-liquid separator.
8. The method for multi-pass automatic metering of oil well production according to claim 4, characterized in that the top of the vertical gas-liquid separator is provided with a safety valve capable of venting the pressure inside the vertical gas-liquid separator.
9. The method for multi-procedure automatic metering of oil well production according to claim 1 or 2 or 5 or 7 or 8, characterized in that a backpressure pipeline is communicated between the single-well metering liquid outlet pipeline and the liquid phase metering discharge pipeline after the liquid discharge pump, and a backpressure valve is connected in series on the backpressure pipeline.
10. The method of claim 6, wherein a backpressure line is connected between the single well metering discharge line and the liquid phase metering discharge line after the liquid discharge pump, and a backpressure valve is connected in series to the backpressure line.
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| CN108487900A (en) * | 2018-04-27 | 2018-09-04 | 中国石油工程建设有限公司北京设计分公司 | A kind of continuous automatic well-selecting metering system and method |
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