CN111691837A - System and method for prolonging life cycle of stratum energy-depleted gas well - Google Patents
System and method for prolonging life cycle of stratum energy-depleted gas well Download PDFInfo
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- CN111691837A CN111691837A CN202010560717.7A CN202010560717A CN111691837A CN 111691837 A CN111691837 A CN 111691837A CN 202010560717 A CN202010560717 A CN 202010560717A CN 111691837 A CN111691837 A CN 111691837A
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- tank body
- gas
- waste liquid
- valve
- gas well
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 239000002699 waste material Substances 0.000 claims abstract description 27
- 238000000926 separation method Methods 0.000 claims abstract description 25
- 239000010865 sewage Substances 0.000 claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 claims abstract description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 31
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses a system and a method for prolonging the life cycle of a gas well with stratum energy exhausted, which comprises separation equipment, a compressor unit (3) and an automatic sewage discharge pipeline; the separation device comprises an upper tank body (1) and a lower tank body (2); the upper tank body (1) is connected with the lower tank body (2) through a waste liquid channel and a pressure regulating channel; the output end of the upper tank body (1) is connected with the input end of the compressor unit (3); the output end of the lower tank body (2) is connected with the input end of the automatic sewage draining pipeline. By the device, the wellhead back pressure of the gas well can be reduced to 0.02MPa which is far lower than the wellhead pressure of a depleted gas well, the single-stage compression ratio can reach 20, and the output pressure requirement of a low-pressure gas well is met; pressurized gas is not required to be injected back into the well, and waste liquid produced by separation can be directly discharged to a gathering and transportation pipe network, so that gas-liquid mixed transportation is realized, and waste liquid treatment is not required.
Description
Technical Field
The invention relates to the field of natural gas exploitation, in particular to a system and a method for prolonging the life cycle of a gas well with stratum energy exhausted.
Background
Along with the development of a natural gas well, stratum energy is gradually released and attenuated, when the well head pressure is reduced to a certain degree and level with the pipe conveying pressure, although the stratum pressure is higher than the pipe conveying pressure, natural gas in the gas well cannot flow into a production pipeline from a shaft, the gas well enters an idle abandonment state at the moment, a certain amount of natural gas in the well is still left underground, underground energy cannot be extracted and wasted, and the development cost input at the early stage cannot obtain the maximum economic benefit.
At present, the method aiming at the situation is to recover the formation pressure by adopting a well closing mode, and then open the well for production after the wellhead pressure is recovered to be higher than the pipe conveying pressure. However, for the ultra-low pressure gas well, due to insufficient stratum capacity in the later mining period, the pressure of a wellhead cannot be recovered to be higher than the pipe conveying pressure even if the well is shut down for a long time, so that the gas well cannot be produced again and discarded, and resource waste is caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a system and a method for prolonging the life cycle of a gas well with stratum energy exhausted.
The invention aims to be realized by the following technical scheme: a system for prolonging life cycle of a gas well with stratum energy exhausted comprises separation equipment, a compressor unit and an automatic sewage discharge pipeline; wherein the separation apparatus comprises an upper tank and a lower tank; the upper tank body is connected with the lower tank body through a waste liquid channel and a pressure regulating channel; the input end of the upper tank body receives gas from a wellhead, and the output end of the upper tank body is connected with the input end of a compressor unit; the output end of the lower tank body is connected with the input end of the automatic sewage draining pipeline; the output end of the compressor unit is divided into two paths, one path is connected with the input end of the lower tank body, the other path is connected with the output end of the automatic sewage discharge pipeline through the air-water mixed delivery standby pressure valve, and the mixed delivery enters an external delivery pipe network.
The waste liquid channel is provided with a one-way valve.
And a pneumatic balance valve is arranged on the pressure regulating channel.
And a pneumatic ball valve is arranged on the automatic sewage draining pipeline.
An automatic blowdown valve is arranged on the automatic blowdown pipeline.
A method of extending the life cycle of a bottom energy depleted gas well comprising the steps of:
s1, introducing gas from the wellhead into a separation device for gas-liquid separation;
s2, compressing the gas after gas-liquid separation by a compressor set, and outputting the compressed gas; the waste liquid after gas-liquid separation flows to the lower tank body from the upper tank body of the separation equipment through the one-way valve;
s3, when the liquid level of the waste liquid in the lower tank body touches the pneumatic ball valve, the pneumatic balance valve is closed, the automatic blow-down valve is opened, and simultaneously high-pressure gas is introduced from the output end of the compressor unit to push the waste liquid to be discharged;
s4, mixing the discharged waste liquid with the compressed gas, and conveying the mixture into an external pipeline network;
and S5, finishing waste liquid discharge, stopping closing, closing the automatic blowdown valve, opening the pneumatic balance valve, and repeating the step S2.
The invention has the beneficial effects that:
(1) by the device, the wellhead back pressure of the gas well can be reduced to 0.02MPa which is far lower than the wellhead pressure of a depleted gas well, the single-stage compression ratio can reach 20, and the output pressure requirement of a low-pressure gas well is met;
(2) by the method, pressurized gas does not need to be injected back into the well, and waste liquid produced by separation can be directly discharged to a gathering and transportation pipe network, so that gas-liquid mixed transportation is realized, and waste liquid does not need to be treated.
Drawings
FIG. 1 is a block diagram of the system of the present invention;
FIG. 2 is a block flow diagram of the method of the present invention;
in the figure, 1-an upper tank body, 2-a lower tank body, 3-a compressor set, 4-a one-way valve, 5-a pneumatic balance valve, 6-an automatic blowdown valve, 7-a pneumatic ball valve and 8-an air-water mixed pressure-backup valve.
Detailed Description
In order to more clearly understand the technical features, objects and effects of the present invention, the embodiments of the present invention will be described with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
A system for prolonging life cycle of a gas well with stratum energy exhausted comprises separation equipment, a compressor unit 3 and an automatic sewage discharge pipeline; wherein the separation apparatus comprises an upper tank 1 and a lower tank 2; the upper tank body 1 is connected with the lower tank body 2 through a waste liquid channel and a pressure regulating channel; the input end of the upper tank body 1 receives gas from a wellhead, and the output end of the upper tank body is connected with the input end of a compressor unit 3; the output end of the lower tank body 2 is connected with the input end of an automatic sewage draining pipeline; the output of compressor unit 3 is divided into two the tunnel, connects the input of lower part jar body 2 all the way, and another way is connected with automatic blowdown pipeline's output through air water thoughtlessly defeated pressure-sustaining valve 8, thoughtlessly defeated entering defeated pipe network outward.
The waste liquid channel is provided with a one-way valve 4.
And a pneumatic balance valve 5 is arranged on the pressure regulating channel.
And a pneumatic ball valve 7 is arranged on the automatic sewage draining pipeline.
An automatic blowdown valve 6 is arranged on the automatic blowdown pipeline.
The embodiment is to the waste gas well that the formation pressure is lower can't the flowing by oneself, can install the device that adopts the gas well of stratum energy exhaustion to prolong life cycle additional at the well head, and the concrete principle flow is as follows:
s1, introducing gas from the wellhead into a separation device for gas-liquid separation;
s2, compressing the gas after gas-liquid separation by the compressor unit 3, and outputting the compressed gas; the waste liquid after gas-liquid separation flows from the upper tank body 1 of the separation equipment to the lower tank body 2 through the one-way valve 4;
s3, when the liquid level of the waste liquid in the lower tank body 2 touches the pneumatic ball valve 7, the pneumatic balance valve 5 is closed, the automatic blow-down valve 6 is opened, and high-pressure gas is introduced from the output end of the compressor unit 3 to push the waste liquid to be discharged;
s4, mixing the discharged waste liquid with the compressed gas, and conveying the mixture into an external pipeline network;
and S5, finishing waste liquid discharge, stopping closing, closing the automatic blowdown valve 6, opening the pneumatic balance valve 5, and repeating the step S2.
By adopting the device and the method, the wellhead pressure of the gas well can be higher than the inlet pressure of the compressor (the pressure is equivalent to the wellhead pipe conveying pressure of the previous gas well), and the outlet pressure of the compressor (the pressure is equivalent to the previous wellhead pressure) is higher than the pipe conveying pressure, so that the recovery production of the gas well is realized, and the life cycle of the gas well is prolonged.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A system for prolonging the life cycle of a gas well with stratum energy exhaustion is characterized by comprising separation equipment, a compressor unit (3) and an automatic sewage discharge pipeline; wherein the separation apparatus comprises an upper tank (1) and a lower tank (2); the upper tank body (1) is connected with the lower tank body (2) through a waste liquid channel and a pressure regulating channel; the input end of the upper tank body (1) receives gas from a wellhead, and the output end of the upper tank body is connected with the input end of a compressor unit (3); the output end of the lower tank body (2) is connected with the input end of an automatic sewage draining pipeline; the output of compressor unit (3) divide into two the tunnel, connects the input of the lower part jar body (2) all the way, and another way is connected with automatic blowdown pipeline's output through air water thoughtlessly defeated reserve pressure valve (8), thoughtlessly defeated entering outer defeated pipe network.
2. The system for prolonging life of a formation energy-depleted gas well as recited in claim 1, wherein a check valve (4) is disposed in the waste liquid channel.
3. The system for prolonging life of a formation energy-depleted gas well as recited in claim 1, wherein the pressure regulating channel is provided with a pneumatic balance valve (5).
4. The system for prolonging life cycle of a depleted gas well of formation energy as recited in claim 1, wherein a pneumatic ball valve (7) is disposed on the automatic blowdown line.
5. The system for prolonging life cycle of a formation energy-depleted gas well as recited in claim 1, wherein an automatic blowdown valve (6) is disposed on the automatic blowdown line.
6. A method of extending the life cycle of a bottom energy depleted gas well comprising the steps of:
s1, introducing gas from the wellhead into a separation device for gas-liquid separation;
s2, compressing the gas after gas-liquid separation by a compressor unit (3), and outputting the compressed gas; the waste liquid after gas-liquid separation flows to the lower tank body (2) from the upper tank body (1) of the separation equipment through the one-way valve (4);
s3, when the liquid level of the waste liquid in the lower tank body (2) triggers the pneumatic ball valve (7), the pneumatic balance valve (5) is closed, the automatic blow-off valve (6) is opened, and high-pressure gas is introduced from the output end of the compressor unit (3) to push the waste liquid to be discharged;
s4, mixing the discharged waste liquid with the compressed gas, and conveying the mixture into an external pipeline network;
and S5, finishing waste liquid discharge, stopping closing, closing the automatic blowdown valve (6), opening the pneumatic balance valve (5), and repeating the step S2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010560717.7A CN111691837A (en) | 2020-06-18 | 2020-06-18 | System and method for prolonging life cycle of stratum energy-depleted gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010560717.7A CN111691837A (en) | 2020-06-18 | 2020-06-18 | System and method for prolonging life cycle of stratum energy-depleted gas well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111691837A true CN111691837A (en) | 2020-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010560717.7A Pending CN111691837A (en) | 2020-06-18 | 2020-06-18 | System and method for prolonging life cycle of stratum energy-depleted gas well |
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| CN (1) | CN111691837A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234672A (en) * | 2014-09-09 | 2014-12-24 | 汉纬尔机械(上海)有限公司 | Compressor extraction system for natural gas well |
| WO2015143538A1 (en) * | 2014-03-24 | 2015-10-01 | Production Plus Energy Services Inc. | Systems and methods for producing formation fluids |
| CN107489404A (en) * | 2017-07-20 | 2017-12-19 | 中石化石油工程技术服务有限公司 | A kind of depleted gas reservoir gas storage surface gathering system |
| CN110454137A (en) * | 2019-08-26 | 2019-11-15 | 杰瑞石油天然气工程有限公司 | A kind of blowdown apparatus of natural gas air inlet separator mesolow liquid |
| CN110761746A (en) * | 2019-11-21 | 2020-02-07 | 西安德林石油工程有限公司 | Gas well liquid drainage method and device |
-
2020
- 2020-06-18 CN CN202010560717.7A patent/CN111691837A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015143538A1 (en) * | 2014-03-24 | 2015-10-01 | Production Plus Energy Services Inc. | Systems and methods for producing formation fluids |
| CN104234672A (en) * | 2014-09-09 | 2014-12-24 | 汉纬尔机械(上海)有限公司 | Compressor extraction system for natural gas well |
| CN107489404A (en) * | 2017-07-20 | 2017-12-19 | 中石化石油工程技术服务有限公司 | A kind of depleted gas reservoir gas storage surface gathering system |
| CN110454137A (en) * | 2019-08-26 | 2019-11-15 | 杰瑞石油天然气工程有限公司 | A kind of blowdown apparatus of natural gas air inlet separator mesolow liquid |
| CN110761746A (en) * | 2019-11-21 | 2020-02-07 | 西安德林石油工程有限公司 | Gas well liquid drainage method and device |
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Application publication date: 20200922 |