CN114809991A - Shale gas well pressure-reducing and production-recovering method - Google Patents
Shale gas well pressure-reducing and production-recovering method Download PDFInfo
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- CN114809991A CN114809991A CN202210389851.4A CN202210389851A CN114809991A CN 114809991 A CN114809991 A CN 114809991A CN 202210389851 A CN202210389851 A CN 202210389851A CN 114809991 A CN114809991 A CN 114809991A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000011084 recovery Methods 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 230000009467 reduction Effects 0.000 claims abstract description 16
- 230000003213 activating effect Effects 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 abstract description 53
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 10
- 239000003345 natural gas Substances 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract 1
- 230000004913 activation Effects 0.000 description 3
- 230000000035 biogenic effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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Classifications
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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
-
- 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
- E21B47/00—Survey of boreholes or wells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses a pressure reduction and production recovery method for a shale gas well, and relates to the technical field of natural gas exploitation. The invention comprises pipeline connection, and the pipeline connection method comprises the following steps: step S1: connecting the well head with the inlet of the separator on the skid; step S2: after gas and liquid enter the separator, water is discharged from an electric drain valve at the lower part; step S3: the gas enters a supercharger from the upper part of the separator, is pressurized and then is metered out of the skid and enters an external conveying pipeline; step S4: and finishing pipeline connection, and applying to single-well pressure reduction and stable production. According to the shale gas well pressure reduction and production recovery method, the supercharger is made into a skid-mounted intelligent control device which is suitable for activating the shale gas well, has large discharge capacity and high lift, has gas-liquid separation and metering, has the outstanding advantages of wide inlet pressure allowable range, low energy consumption and the like, replaces a flooded well to activate atmosphere blowout, reduces energy waste and atmospheric pollution, and can maintain stable production.
Description
Technical Field
The invention relates to the technical field of natural gas exploitation, in particular to a pressure reduction and production recovery method for a shale gas well.
Background
The shale gas is natural gas which is rich in organic matters, matured dark shale or high-carbon shale, stores and preserves biogenic and pyrolytic causative factors with certain commercial values and mixed causative factors of the biogenic and the pyrolytic causative factors due to the adsorption effect of the organic matters or the existence of cracks and matrix pores in the rock, is unconventional natural gas in a storage rock system mainly based on the organic-rich shale, is continuously generated biochemical causative gas, thermal causative gas or the mixture of the biochemical causative gas and the thermal causative gas, can exist in the natural cracks and pores in a free state, exists on the surfaces of kerogen and clay particles in an adsorption state, and is stored in the kerogen and the asphaltene in a very small amount in a dissolved state, wherein the proportion of the free gas is generally 20-85%;
taking a shale gas well produced by an oil pipe as an example, the gas yield is higher from the initial stage of production, the shale gas well can carry liquid for production, but the bottom hole pressure is gradually reduced along with the time extension, after the oil pressure of a well head is equal to the output pressure, the gas yield is gradually reduced to a certain degree, the liquid can not be carried for production, the liquid in the well is accumulated more and more, so that the production is stopped, and at the moment, a re-production measure must be taken;
the existing shale gas well production recovery method is to vent the atmosphere to reduce the pressure (oil pressure or casing pressure) of a well mouth, so that liquid in the well is produced along with the gas, the liquid is ignited in an ignition pool or a torch to discharge accumulated water in the well, the accumulated water reaches the gas production rate capable of carrying liquid for production, and then the process production is carried out to realize external transportation, and the shale gas well production recovery method has the advantages that although the production recovery can be carried out, the methane gas is blown into the atmosphere to cause economic loss, the problem of environmental pollution is also caused, frequent production recovery measures are needed in the later production period of the shale gas well, and the operation workload is large; therefore, a shale gas well pressure reduction and production recovery method is provided.
Disclosure of Invention
The invention aims to provide a pressure reduction and production recovery method for a shale gas well, which is characterized in that a supercharger is made into skid-mounted intelligent control equipment which is suitable for activating the shale gas well, has large displacement and high lift and has gas-liquid separation and metering, and solves the problems in the background.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a pressure reduction and production recovery method for a shale gas well.A supercharger is made into skid-mounted intelligent control equipment which is suitable for activating the shale gas well, has large displacement and high lift, and has gas-liquid separation and metering, and comprises pipeline connection;
the pipeline connecting method comprises the following steps:
step S1: connecting the well head with the inlet of the separator on the skid;
step S2: after gas and liquid enter the separator, water is discharged from an electric drain valve at the lower part, and the discharged water can enter a water tank (a water pool and the like) in a well site or enter an external conveying pipeline after being boosted by a water pump;
step S3: the gas enters a supercharger from the upper part of the separator, is pressurized and then is metered out of the skid and enters an external conveying pipeline;
step S4: and finishing pipeline connection, and applying to single-well pressure reduction and stable production. The equipment is applied to single-well depressurization and stable production, and is not used for replacing emptying activation and recovery of shale gas wells.
The supercharger is driven by a motor to rotate an eccentric wheel to form a cavity which changes from large to small, so that gas entering the supercharger is compressed and discharged.
The water discharged in the step S2 is introduced into a water tank or a pool in the well.
And the water discharged in the step S2 enters an outward conveying pipeline after being boosted by a water pump.
The shale gas well has the advantages that the wellhead pressure is reduced, the bottom pressure is reduced, the gas production is increased, the volume flow rate of gas in the shaft is increased, the water carrying capacity is enhanced, and the shale gas well can recover stable production.
The method also comprises the steps of remotely acquiring data, carrying out expert analysis at a remote end, carrying out intelligent closed-loop control on the site, and ensuring that the shaft is in liquid carrying production and the equipment is in an optimal running state.
The invention has the following beneficial effects:
according to the shale gas well pressure reduction and recovery method, the inlet pressure of the supercharger is adjusted at will according to needs, the supercharger is used for pumping the wellhead, the wellhead pressure is reduced, and the effect equivalent to the atmospheric open flow activation is achieved.
And secondly, the pressure reduction and production recovery method of the shale gas well comprises the steps of boosting the pressure of gas produced in all wells, inputting the gas into an outward conveying pipeline, carrying the produced water, separating the water, and then inputting the water into a water treatment system, wherein the gas can also be output together with the boosted gas.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of the operation of the pipeline connection method of the shale gas well depressurization and recovery method of the present invention;
FIG. 2 is a flow chart of the operation of the shale gas well depressurization and recovery of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1-2: the invention relates to a pressure reduction and production recovery method for a shale gas well, which is characterized in that a supercharger is made into skid-mounted intelligent control equipment which is suitable for activating the shale gas well, has large displacement and high lift and has gas-liquid separation and metering, wherein the supercharger is driven by a motor to rotate an eccentric wheel to form a cavity which changes from large to small, so that the gas entering the cavity is compressed and discharged;
the skid-mounted intelligent control equipment comprises pipeline connection;
a method of pipeline connection comprising the steps of:
step S1: connecting the well head with the inlet of the separator on the skid; step S2: after gas and liquid enter the separator, water is discharged from an electric drain valve at the lower part, and the discharged water can enter a water tank (a water pool and the like) in a well site or enter an external conveying pipeline after being boosted by a water pump; step S3: the gas enters a supercharger from the upper part of the separator, is pressurized and then is metered out of the skid and enters an external conveying pipeline; step S4: and finishing pipeline connection, and applying to single-well pressure reduction and stable production.
The pressure of the shale gas well wellhead is reduced, so that the pressure of the well bottom is reduced, the gas production is increased, the volume flow rate of the gas in the shaft is increased, and the water carrying capacity is enhanced;
the method also comprises the steps of remotely acquiring data, carrying out expert analysis at a remote end, carrying out intelligent closed-loop control on the site, and ensuring that the shaft is in liquid carrying production and the equipment is in an optimal running state.
The equipment is applied to single-well depressurization and stable production, and is not used for replacing emptying activation and recovery of shale gas wells; has the outstanding advantages of wide allowable range of inlet pressure, low energy consumption and the like.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. A pressure reduction and production recovery method for a shale gas well is characterized in that a supercharger is made into skid-mounted intelligent control equipment which is suitable for activating the shale gas well, has large displacement and high lift, and has gas-liquid separation and metering functions, and comprises pipeline connection;
the pipeline connecting method comprises the following steps:
step S1: connecting the well head with the inlet of the separator on the skid;
step S2: after gas and liquid enter the separator, water is discharged from an electric drain valve at the lower part;
step S3: the gas enters a supercharger from the upper part of the separator, is pressurized and then is metered out of the skid and enters an external conveying pipeline;
step S4: and finishing pipeline connection, and applying to single-well pressure reduction and stable production.
2. The shale gas well pressure reduction and recovery method as claimed in claim 1, wherein the supercharger is driven by a motor to rotate an eccentric wheel to form a cavity which changes from large to small, so that gas entering the cavity is compressed and discharged.
3. The shale gas well depressurization recovery method of claim 1, wherein the water discharged in the step S2 enters a water tank or a water pool in a well site.
4. The shale gas well depressurization and recovery method of claim 3, wherein the water discharged in the step S2 enters an export pipeline after being pumped up.
5. The shale gas well depressurization and recovery method as claimed in claim 1 wherein the shale gas well wellhead pressure is reduced, which results in a reduced bottom hole pressure, increased gas production, increased gas volume flow rate in the wellbore and increased water carrying capacity.
6. The shale gas well pressure reduction and recovery method as claimed in claim 1, wherein the steps further comprise remotely acquiring data, remotely performing expert analysis, performing intelligent closed-loop control on site, and ensuring that a shaft is in liquid carrying production and equipment is in an optimal operation state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210389851.4A CN114809991A (en) | 2022-04-14 | 2022-04-14 | Shale gas well pressure-reducing and production-recovering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210389851.4A CN114809991A (en) | 2022-04-14 | 2022-04-14 | Shale gas well pressure-reducing and production-recovering method |
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| Publication Number | Publication Date |
|---|---|
| CN114809991A true CN114809991A (en) | 2022-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210389851.4A Pending CN114809991A (en) | 2022-04-14 | 2022-04-14 | Shale gas well pressure-reducing and production-recovering method |
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| CN (1) | CN114809991A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020007968A1 (en) * | 1996-02-01 | 2002-01-24 | Robert Gardes | Method and system for hydraulic friction controlled drilling and completing geopressured wells utilizing concentric drill strings |
| CN104406038A (en) * | 2014-10-22 | 2015-03-11 | 中国石油天然气股份有限公司 | Low-pressure gas pressure-restoring device and method |
| CN105370248A (en) * | 2014-08-30 | 2016-03-02 | 中石化重庆涪陵页岩气勘探开发有限公司 | Shale gas well gas testing and production device and flow |
| CN108019190A (en) * | 2017-12-25 | 2018-05-11 | 中山乐满石油设备有限公司 | A kind of totally-enclosed mixes defeated decompression circulation gas lift system |
| CN112943170A (en) * | 2021-03-03 | 2021-06-11 | 盘锦华晨石油装备制造有限公司 | Pressurization and yield increase associated circulating gas lift system for low-pressure gas well |
| CN213574874U (en) * | 2020-10-13 | 2021-06-29 | 东营市巨丰节能设备有限责任公司 | Star-rotating gas-liquid mixed transportation pump combined skid-mounted device |
-
2022
- 2022-04-14 CN CN202210389851.4A patent/CN114809991A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020007968A1 (en) * | 1996-02-01 | 2002-01-24 | Robert Gardes | Method and system for hydraulic friction controlled drilling and completing geopressured wells utilizing concentric drill strings |
| CN105370248A (en) * | 2014-08-30 | 2016-03-02 | 中石化重庆涪陵页岩气勘探开发有限公司 | Shale gas well gas testing and production device and flow |
| CN104406038A (en) * | 2014-10-22 | 2015-03-11 | 中国石油天然气股份有限公司 | Low-pressure gas pressure-restoring device and method |
| CN108019190A (en) * | 2017-12-25 | 2018-05-11 | 中山乐满石油设备有限公司 | A kind of totally-enclosed mixes defeated decompression circulation gas lift system |
| CN213574874U (en) * | 2020-10-13 | 2021-06-29 | 东营市巨丰节能设备有限责任公司 | Star-rotating gas-liquid mixed transportation pump combined skid-mounted device |
| CN112943170A (en) * | 2021-03-03 | 2021-06-11 | 盘锦华晨石油装备制造有限公司 | Pressurization and yield increase associated circulating gas lift system for low-pressure gas well |
Non-Patent Citations (1)
| Title |
|---|
| 胜利油田现河石油装备有限公司: "星旋式混输泵组： Q/0500SHG002-2016", pages: 1 - 8 * |
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