CN103422842A - Oil well plugging, adjusting and washing process - Google Patents
Oil well plugging, adjusting and washing process Download PDFInfo
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- CN103422842A CN103422842A CN2013103909967A CN201310390996A CN103422842A CN 103422842 A CN103422842 A CN 103422842A CN 2013103909967 A CN2013103909967 A CN 2013103909967A CN 201310390996 A CN201310390996 A CN 201310390996A CN 103422842 A CN103422842 A CN 103422842A
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- oil
- surfactant
- profile control
- polymer
- oil well
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- 239000003129 oil well Substances 0.000 title claims abstract description 26
- 238000005406 washing Methods 0.000 title abstract 3
- 239000004094 surface-active agent Substances 0.000 claims abstract description 31
- 229920000642 polymer Polymers 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000006073 displacement reaction Methods 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 7
- 239000004568 cement Substances 0.000 claims abstract description 5
- 150000001875 compounds Chemical class 0.000 claims description 9
- 230000008595 infiltration Effects 0.000 claims description 9
- 238000001764 infiltration Methods 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 8
- 230000005012 migration Effects 0.000 claims description 7
- 238000013508 migration Methods 0.000 claims description 7
- 239000003814 drug Substances 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 4
- 238000011084 recovery Methods 0.000 abstract description 10
- 238000007789 sealing Methods 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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Abstract
The invention relates to a plugging, adjusting and washing process of an oil-water well, which is adopted when measures for improving the recovery ratio are carried out on a high-water-content oil well in oil extraction production. The process comprises the following steps: the surfactant firstly enters a high-permeability part to clean residual oil in the high-permeability part, then the reverse profile control polymer is injected, the viscosity of the reverse profile control polymer is higher than that of the surfactant, the surfactant is driven to migrate to the deep part of a reservoir stratum, and after an oil well recovers to produce, the polymer migrates along a backflow channel of the surfactant under the displacement action of injected water to form plugging; then injecting a composite water shutoff agent to perform high-strength shutoff on the high-permeability part, reducing the liquid outlet capacity of the interval, and then sealing the near wellbore zone by using cement to prevent the injected agent from returning to the wellbore; and finally, replacing the polymer solution to flush the shaft. The process improves the oil washing efficiency while ensuring that the high-permeability part in the interval is effectively blocked, fully excavates the residual oil in the interval, improves the oil outlet potential of a single well, and improves the recovery ratio.
Description
Technical field
The oil well adopted while the present invention relates in oil recovery production high-water-cut oil-producing well is implemented to improve the recovery ratio measure blocks up, adjusts, washes technique.
Background technology
Control measures for high-water-cut oil-producing well mainly adopts compound water shutoff technology at present, this technology is to utilize compound water shutoff agent to carry out shutoff to oil well high aquifer formation section, reduce interval fluid ability, but this technology is only simple shutoff, though high aquifer formation is had to sealing characteristics preferably, can therefore form " region of bypassed oil ", in layer, remaining oil still is trapped in hole, in follow-up recovery process, can not be gone out by displacement, oil recovery efficiency can't improve.
Summary of the invention
In order to improve the recovery ratio of high-water-cut oil-producing well, the invention provides a kind of oil well and block up, adjust, wash technique.Displacement efficiency is effectively improved in shutoff in this technique high infiltration position in guaranteeing interval, fills remaining oil in part tap layer, improves the fuel-displaced potentiality of individual well, improves recovery ratio.
Technical scheme of the present invention is: a kind of oil well blocks up, adjusts, washes technique, it is characterized in that comprising following process: the surfactant rate is introduced into high infiltration position and cleans remaining oil wherein, then inject reverse profile control polymer, due to the viscosity of reverse profile control polymer, higher than surfactant, can drive surfactant to the reservoir deep migration, after oil well resumes production, polymer is under injected water displacement effect, along the return flow line migration of surfactant, displacement hyposmosis position remaining oil, and form shutoff; Reinject compound water shutoff agent to above-mentioned height infiltration position laggard row high strength shutoff, reduce High Permeability Interval fluid ability, apply cement thereupon near wellbore zone is sealed, prevent from that the medicament injected from returning to tell back pit shaft; Last using polymer solution replaces, and plays the purpose of rinsing pit shaft.
Above-mentioned surfactant concentration of aqueous solution is 1.0%; Oppositely the aqueous solution ratio of profile control polymer is 8000mg/L.
The usage ratio of above-mentioned surfactant and reverse profile control polymer is according to different sandstone thickness adjustment.
The invention has the beneficial effects as follows: it is first to inject surfactant solution slug, reverse profile control polymer slug before compound sealing agent slug that above-mentioned oil well blocks up, adjusts, washes technology, by blocking up, adjust, wash a kind of technology mode of the integrated application of three technology on oil well, enlarge the swept volume of well end injected water, reduce oil well end comprehensive water cut, improve displacement efficiency, fully remaining oil in tap layer, improve recovery ratio.Realized many measures comprehensive regulation of oil well, this technique had both made up the deficiency that single compound water-plugging technology " only blocks up and do not wash ", the reverse profile control technology of application has carried out " secondary plugging " to interval again, make single control measures originally obtain further reinforcement, in layer, more difficult remaining oil of taping the latent power is gone out by effective displacement, improved displacement efficiency, tap the latent power effect and reservoir development degree of measure is improved.The technology field trial of blocking up oil well, adjust, wash has obtained tapping oil potentials through controlling water cut effect preferably, when regulating old liberated area high-water-cut oil-producing well heterogeneous body contradiction, utilize surfactant, reverse profile control agent that the remaining oil at hyposmosis position is effectively taped the latent power, the oil well comprehensive water cut rises and is controlled.This technique provides strong technical support for low permeability oil field high water-cut development period Tapping Residual Oil, significant to improving Periphery Oilfield high water-cut stage development effectiveness and benefit.
The accompanying drawing explanation
Fig. 1 a is liquid injection process schematic diagram;
Fig. 1 b is for replying the manufacturing process schematic diagram.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
It is first to inject surfactant solution slug, reverse profile control polymer slug before compound sealing agent slug that this oil well blocks up, adjusts, washes technology, by blocking up, adjust, wash a kind of technology mode of the integrated application of three technology on oil well, enlarge the swept volume of well end injected water, reduce oil well end comprehensive water cut, improve displacement efficiency, fully remaining oil in tap layer, improve recovery ratio.
Specifically comprise following process: 1, preposition slug injects: the medicament of this slug application is surfactant solution and reverse profile control polymer, remaining oil is wherein cleaned at the height infiltration position that the surfactant rate is introduced in pre-shutoff interval, inject subsequently reverse profile control polymer, due to the viscosity of reverse profile control polymer higher than surfactant, can drive surfactant to the reservoir deep migration, after oil well resumes production, polymer is under injected water displacement effect, the return flow line migration of cleaning along surfactant, form shutoff; 2, the shutoff slug injects: apply compound water shutoff agent as main shutoff medicament, can carry out the high strength shutoff to above-mentioned height infiltration position after this slug injects, thereby reduce interval fluid ability; 3, the sealing slug injects: adopt cement paste solution to be sealed near wellbore zone, can prevent from after cement paste solidifies that the sealing agent injected from returning to tell back pit shaft; 4, replacing slug injects: using polymer solution carries out excessive in squeezing, and replaces in well and the medicament of near wellbore zone, plays the purpose of rinsing pit shaft, can prevent the generation of welded tube post phenomenon.
In such scheme, the surfactant of injecting is carried out " cleaning " to the remaining oil at height infiltration position, avoids direct shutoff to form " region of bypassed oil ", because the composite plugging agent used is all hydrophilic, can the remaining oil under " cleaning " not resulted in blockage, make plugging effect better.When the oil well opening well and making production, due to high permeability zone, by shutoff, so surfactant can be injected into water punching and take to not by shutoff or only have the hyposmosis position of a small amount of sealing agent, thereby improves the development degree at hyposmosis position, improves displacement efficiency; When oil well resumes production, the reverse profile control polymer injected is under injected water displacement effect, can backflow to the pit shaft end, because height infiltration position is blocked by follow-up compound sealing agent, new " backflow " passage migration that oppositely the profile control polymer can go out along surfactant " developing ", form reverse profile control secondary plugging, thereby enlarge the water drive swept volume.Fig. 1 a is liquid injection process schematic diagram; Fig. 1 b is for replying the manufacturing process schematic diagram.
By field trial, determine, the surfactant solution concentration of individual well application is 1.0%, and oppositely the profile control polymer solution concentration is 8000mg/L, and surfactant is 50m with reverse profile control polymer slug medicament total amount
3.The usage ratio of above-mentioned surfactant and reverse profile control polymer is according to different sandstone thickness adjustment, during test, the improvement interval of target oil well is divided into to four classes by sandstone thickness, be respectively≤3.0m, 3.0m～5.0m, 5.0m～7.0m and>7.0m, according to different sandstone thickness, the usage ratio of surfactant and reverse profile control polymer slug is adjusted into respectively to 1:4,1:1,4:1 and 3:2, apply different allocation proportions, make the individual well regulation effect reach maximization.
Claims (3)
1. an oil well blocks up, adjusts, washes technique, it is characterized in that comprising following process: the surfactant rate is introduced into high infiltration position and cleans remaining oil wherein, then inject reverse profile control polymer, due to the viscosity of reverse profile control polymer, higher than surfactant, can drive surfactant to the reservoir deep migration, after oil well resumes production, polymer is under injected water displacement effect, along the return flow line migration of surfactant, displacement hyposmosis position remaining oil, and form shutoff; Reinject compound water shutoff agent to above-mentioned height infiltration position laggard row high strength shutoff, reduce High Permeability Interval fluid ability, apply cement thereupon near wellbore zone is sealed, prevent from that the medicament injected from returning to tell back pit shaft; Last using polymer solution replaces, and plays the purpose of rinsing pit shaft.
2. oil well according to claim 1 blocks up, adjusts, washes technique, it is characterized in that: above-mentioned surfactant concentration of aqueous solution is 1.0%, oppositely the aqueous solution ratio of profile control polymer is 8000mg/L.
3. oil well according to claim 1 blocks up, adjusts, washes technique, it is characterized in that: the usage ratio of above-mentioned surfactant and reverse profile control polymer is according to different sandstone thickness adjustment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310390996.7A CN103422842B (en) | 2013-09-02 | 2013-09-02 | Oil well plugging, adjusting and washing process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310390996.7A CN103422842B (en) | 2013-09-02 | 2013-09-02 | Oil well plugging, adjusting and washing process |
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| CN103422842A true CN103422842A (en) | 2013-12-04 |
| CN103422842B CN103422842B (en) | 2016-08-10 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153731B (en) * | 2014-07-11 | 2016-05-25 | 东营市华翰石油技术开发有限公司 | A kind of well drilling waste mud reuse water plugging and profile controlling process |
| CN106481307A (en) * | 2015-08-24 | 2017-03-08 | 中国石油化工股份有限公司 | A kind of method of many series of strata differentiation closure |
| CN108102725A (en) * | 2018-01-02 | 2018-06-01 | 武汉恩孚水务有限公司 | A kind of pyrolysis rate control method of pyrolysis gasification furnace |
| CN109751023A (en) * | 2018-08-16 | 2019-05-14 | 郭志东 | Drive, tune, the stifled integration that wide scope permanently reduces blowhole improve recovery ratio method |
| CN110552656A (en) * | 2019-08-19 | 2019-12-10 | 中国石油天然气股份有限公司 | Method for fixed-point crack initiation of low-permeability layer of water flooded well |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4817719A (en) * | 1986-07-30 | 1989-04-04 | Mobil Oil Corporation | Method for suspending wells |
| CN1342829A (en) * | 2001-08-27 | 2002-04-03 | 石油大学(华东) | Edge water scheduling technique for oil field using edge water to displace oil |
| CN1464173A (en) * | 2002-06-14 | 2003-12-31 | 中国石油天然气股份有限公司 | Modified tannin extract gel water plugging technology suitable for high-temperature high-salt oil reservoir |
| WO2005066456A1 (en) * | 2004-01-09 | 2005-07-21 | Alberta Research Council Inc. | Method of reducing water influx into gas wells |
| CN101280678A (en) * | 2008-05-09 | 2008-10-08 | 大庆汇联技术开发有限公司 | Oil well chemical gorge and disgorge yield increasing and inverse direction regulating block connection working process |
-
2013
- 2013-09-02 CN CN201310390996.7A patent/CN103422842B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4817719A (en) * | 1986-07-30 | 1989-04-04 | Mobil Oil Corporation | Method for suspending wells |
| CN1342829A (en) * | 2001-08-27 | 2002-04-03 | 石油大学(华东) | Edge water scheduling technique for oil field using edge water to displace oil |
| CN1464173A (en) * | 2002-06-14 | 2003-12-31 | 中国石油天然气股份有限公司 | Modified tannin extract gel water plugging technology suitable for high-temperature high-salt oil reservoir |
| WO2005066456A1 (en) * | 2004-01-09 | 2005-07-21 | Alberta Research Council Inc. | Method of reducing water influx into gas wells |
| CN101280678A (en) * | 2008-05-09 | 2008-10-08 | 大庆汇联技术开发有限公司 | Oil well chemical gorge and disgorge yield increasing and inverse direction regulating block connection working process |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153731B (en) * | 2014-07-11 | 2016-05-25 | 东营市华翰石油技术开发有限公司 | A kind of well drilling waste mud reuse water plugging and profile controlling process |
| CN106481307A (en) * | 2015-08-24 | 2017-03-08 | 中国石油化工股份有限公司 | A kind of method of many series of strata differentiation closure |
| CN108102725A (en) * | 2018-01-02 | 2018-06-01 | 武汉恩孚水务有限公司 | A kind of pyrolysis rate control method of pyrolysis gasification furnace |
| CN109751023A (en) * | 2018-08-16 | 2019-05-14 | 郭志东 | Drive, tune, the stifled integration that wide scope permanently reduces blowhole improve recovery ratio method |
| CN110552656A (en) * | 2019-08-19 | 2019-12-10 | 中国石油天然气股份有限公司 | Method for fixed-point crack initiation of low-permeability layer of water flooded well |
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| CN103422842B (en) | 2016-08-10 |
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