CN103422842A - Plugging, regulating and washing process of oil well - Google Patents
Plugging, regulating and washing process of oil well 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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Abstract
The invention relates to a plugging, adjusting and washing process of an oil well. The plugging, regulating and washing process is used for taking enhanced oil recovery measures on a high-water-cut-oil-producing well in oil recovery production and comprises the following procedures that surface active agent first enters a high-permeability part for cleaning remaining oil in the high-permeability part, and then a reverse profile control polymer is injected into the high-permeability part, since the viscosity of the reverse profile control polymer is greater than that of the surface active agent, the reverse profile control polymer drives the surface active agent to migrate to the deep part of a reservoir, and after the oil well resumes production, the reverse profile control polymer migrates along a backflow passage of the surface active agent under the displacement action of injected water to form plugging; then complex water plugging agent is injected for carrying out high-strength plugging on the high-permeability part, the liquid outlet capability of an interval is reduced, and after that cement is used for sealing a near-wellbore area for preventing injected medicament from returning to be poured into a shaft; finally a polymer solution is used for replacing a slug to play an effect on washing the shaft. The displacement efficiency is improved while the high-permeability part in the interval is effectively plugged, remaining oil in the reservoir is fully excavated, the oil ingress potential of a single well is improved, and the recovery rate is improved.
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 |
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| CN201310390996.7A CN103422842B (en) | 2013-09-02 | 2013-09-02 | Oil well blocks up, adjusts, washes technique |
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| CN201310390996.7A CN103422842B (en) | 2013-09-02 | 2013-09-02 | Oil well blocks up, adjusts, washes technique |
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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 |
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| 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 technique adapted for high temperature and high salt oil deposit |
| 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 |
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2013
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| 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 technique adapted for high temperature and high salt oil deposit |
| 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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