CN112983374A - Liquid bridge plug under-pressure operation method - Google Patents
Liquid bridge plug under-pressure operation method Download PDFInfo
- Publication number
- CN112983374A CN112983374A CN202110162373.9A CN202110162373A CN112983374A CN 112983374 A CN112983374 A CN 112983374A CN 202110162373 A CN202110162373 A CN 202110162373A CN 112983374 A CN112983374 A CN 112983374A
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- China
- Prior art keywords
- temporary plugging
- liquid
- pressure
- plugging agent
- construction
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000007788 liquid Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000010276 construction Methods 0.000 claims abstract description 19
- 230000015556 catabolic process Effects 0.000 claims abstract description 9
- 238000006731 degradation reaction Methods 0.000 claims abstract description 9
- 239000007787 solid Substances 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims abstract description 4
- 238000004132 cross linking Methods 0.000 claims abstract description 3
- 238000005086 pumping Methods 0.000 claims abstract description 3
- 230000007281 self degradation Effects 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 description 14
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000009096 changqing Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002332 oil field water Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002699 waste material 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
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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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a liquid bridge plug under-pressure operation method, which comprises the following steps: pumping a solid temporary plugging agent A from an oil pipe to plug a blast hole; secondly, lifting the pipe column to the upper part of the perforation section, and injecting a liquid temporary plugging agent B into the shaft; thirdly, lifting the pipe column at normal pressure after temporary plugging agent crosslinking to realize construction under pressure; and fourthly, washing the well by using degradation liquid C after construction is finished. The invention mainly adopts a self-degradable temporary plugging ball, pumps the temporary plugging ball into a blast hole, plugs a shaft after being cemented by a liquid temporary plugging agent, has stable shaft pressure, and lifts a pipe column in an oil pipe at normal pressure; after the construction is finished, the degradation liquid is adopted to wash the well, and the method can reduce the operation cost under pressure and simplify the construction process.
Description
Technical Field
The invention belongs to the technical field of oilfield water injection well operation, and particularly relates to a liquid bridge plug under-pressure operation method.
Background
The pressure relief time of the current water injection well of the Changqing oil field accounts for more than 70% of the total construction time, and the pressure relief causes resource and economic waste, stratum energy loss, safety, environmental protection and the like. In recent years, the operation well under pressure of the water injection well is increased year by year, the operation cost of a single well under pressure is more than 20 ten thousand yuan, and the cost pressure is high. Therefore, a technology for operating under pressure with higher cost performance, simpler operation and shorter construction period is needed.
In order to reduce the operation cost under pressure and simplify the construction process, a liquid temporary plugging system (temporary plugging ball or temporary plugging agent) capable of self-degradation (or acid pickling explanation) is innovatively developed by using the technical principle of temporary fracturing of a storage reconstruction seam, the perforation section of a water injection well is temporarily plugged, normal-pressure operation of a shaft is realized, and normal water injection is realized through system degradation after construction is finished.
Disclosure of Invention
The invention aims to provide a liquid bridge plug under-pressure operation method.
The invention is realized by adopting the following technical scheme:
a liquid bridge plug under-pressure operation method comprises the following steps:
pumping a solid temporary plugging agent A from an oil pipe to plug a blast hole;
secondly, lifting the pipe column to the upper part of the perforation section, and injecting a liquid temporary plugging agent B into the shaft;
thirdly, lifting the pipe column at normal pressure after temporary plugging agent crosslinking to realize construction under pressure;
and fourthly, washing the well by using degradation liquid C after construction is finished.
The invention further improves that the solid temporary plugging agent A is a polymer self-degradation temporary plugging ball suitable for dispensers with different sizes and temperatures of different well depths.
The invention further improves that the liquid temporary plugging agent B is a polymer self-degradation temporary plugging ball suitable for different well depth temperatures.
A further development of the invention consists in that, in a first step, balls of 1.5 to 1.7 times the diameter of the borehole are pumped into the borehole.
The invention has the further improvement that in the first step, after the ball is pumped into the blast hole, the pressure is stabilized for 10 minutes without reducing the pressure.
In a further development of the invention, in a second step, the column is lifted up 50-100m above the perforation zone.
The invention has the following beneficial technical effects:
the invention provides a liquid bridge plug under-pressure operation method, which mainly adopts a self-degradable temporary plugging ball and pumps the ball into a blast hole, a shaft is plugged after being cemented by a liquid temporary plugging agent, the pressure of the shaft is stable, and a pipe column is lifted up in an oil pipe under normal pressure; after the construction is finished, the degradation liquid is adopted to wash the well, and the method can reduce the operation cost under pressure and simplify the construction process.
Drawings
FIG. 1 is a solid temporary plugging agent A injected into an oil pipe of the present invention;
FIG. 2 is a schematic view of the present invention, wherein a tubular column is lifted to the upper part of a perforation section, and a temporary plugging agent B is injected into a shaft;
FIG. 3 shows that the temporary plugging agent is crosslinked and then the pipe column is lifted up under normal pressure, and the well is washed by degradation liquid C.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings.
The invention provides a liquid bridge plug under-pressure operation method, which mainly adopts a temporary plugging ball capable of self-degrading, pumps a ball with the diameter 1.5-1.7 times of the diameter of a blast hole into the blast hole, stabilizes the pressure for 10 minutes, and does not reduce the pressure; lifting the pipe column to a position 50-100m above the perforation section, plugging the shaft after cementing by adopting a liquid temporary plugging agent, stabilizing the pressure of the shaft, and lifting the pipe column at normal pressure in the oil pipe; and after construction, the well is washed by degradation liquid. The construction of the operation under pressure realized by the method is a technique of operation under pressure with simpler operation and shorter construction period.
Example (b):
the practice of the invention is further illustrated with reference to figures 1, 2 and 3:
in the first step, as shown in fig. 1, a solid temporary plugging agent a is pumped from the oil pipe to plug the blasthole.
And secondly, lifting the pipe column to the upper part of the perforation section and injecting a liquid temporary plugging agent B into the shaft as shown in figure 2.
And thirdly, as shown in figure 3, lifting the pipe column at normal pressure after the temporary plugging agent is crosslinked, thereby realizing construction under pressure.
And fourthly, washing the well by using degradation liquid C after construction is finished.
Claims (6)
1. A liquid bridge plug under-pressure operation method is characterized by comprising the following steps:
pumping a solid temporary plugging agent A from an oil pipe to plug a blast hole;
secondly, lifting the pipe column to the upper part of the perforation section, and injecting a liquid temporary plugging agent B into the shaft;
thirdly, lifting the pipe column at normal pressure after temporary plugging agent crosslinking to realize construction under pressure;
and fourthly, washing the well by using degradation liquid C after construction is finished.
2. The method for operating the liquid bridge plug under pressure according to claim 1, wherein the solid temporary plugging agent A is a polymer self-degradation temporary plugging ball suitable for injectors with different sizes and temperatures in different well depths.
3. The method for operating the liquid bridge plug under pressure according to claim 1, wherein the liquid temporary plugging agent B is a polymer self-degradation temporary plugging ball suitable for different well depth temperatures.
4. A method of operating a liquid bridge plug under pressure as claimed in claim 1, wherein in the first step, a ball having a diameter of 1.5 to 1.7 times the diameter of the borehole is pumped into the borehole.
5. A method as claimed in claim 1, wherein in the first step, the pressure is stabilized for 10 minutes without decreasing after the ball pump is inserted into the borehole.
6. A method as claimed in claim 1, wherein in the second step, the pipe is lifted to a position 50-100m above the perforation section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110162373.9A CN112983374A (en) | 2021-02-05 | 2021-02-05 | Liquid bridge plug under-pressure operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110162373.9A CN112983374A (en) | 2021-02-05 | 2021-02-05 | Liquid bridge plug under-pressure operation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112983374A true CN112983374A (en) | 2021-06-18 |
Family
ID=76348191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110162373.9A Pending CN112983374A (en) | 2021-02-05 | 2021-02-05 | Liquid bridge plug under-pressure operation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112983374A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116606637A (en) * | 2023-07-21 | 2023-08-18 | 东营市汇友石油新技术开发有限责任公司 | Liquid bridge plug and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775023A (en) * | 2013-01-30 | 2014-05-07 | 中国石油天然气股份有限公司 | Well killing construction method for low-pressure oil and gas well |
| CN106437662A (en) * | 2016-10-26 | 2017-02-22 | 东方宝麟科技发展(北京)有限公司 | Hybrid temporary plugging volume fracturing method suitable for deep shale gas horizontal well |
| CN110242247A (en) * | 2019-05-21 | 2019-09-17 | 中国石油天然气股份有限公司 | Temporary plugging method and temporary plugging agent for lifting and lowering pipe column construction of water injection well |
| CN112094389A (en) * | 2020-09-25 | 2020-12-18 | 中国石油集团渤海钻探工程有限公司 | High-temperature-resistant liquid bridge plug, preparation method and construction method |
-
2021
- 2021-02-05 CN CN202110162373.9A patent/CN112983374A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775023A (en) * | 2013-01-30 | 2014-05-07 | 中国石油天然气股份有限公司 | Well killing construction method for low-pressure oil and gas well |
| CN106437662A (en) * | 2016-10-26 | 2017-02-22 | 东方宝麟科技发展(北京)有限公司 | Hybrid temporary plugging volume fracturing method suitable for deep shale gas horizontal well |
| CN110242247A (en) * | 2019-05-21 | 2019-09-17 | 中国石油天然气股份有限公司 | Temporary plugging method and temporary plugging agent for lifting and lowering pipe column construction of water injection well |
| CN112094389A (en) * | 2020-09-25 | 2020-12-18 | 中国石油集团渤海钻探工程有限公司 | High-temperature-resistant liquid bridge plug, preparation method and construction method |
Non-Patent Citations (3)
| Title |
|---|
| 张福祥等: "适用于井筒封堵技术液体桥塞的合成与性质", 《新疆石油天然气》 * |
| 杨健等: "低压气井暂堵修井工艺技术探讨", 《天然气工业》 * |
| 杨建平等: "LH-I型液体桥塞的研制及应用", 《特种油气藏》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116606637A (en) * | 2023-07-21 | 2023-08-18 | 东营市汇友石油新技术开发有限责任公司 | Liquid bridge plug and preparation method thereof |
| CN116606637B (en) * | 2023-07-21 | 2023-09-26 | 东营市汇友石油新技术开发有限责任公司 | Liquid bridge plug and preparation method thereof |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210618 |
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| RJ01 | Rejection of invention patent application after publication |