CN103422842B - Oil well blocks up, adjusts, washes technique - Google Patents
Oil well blocks up, adjusts, washes technique Download PDFInfo
- Publication number
- CN103422842B CN103422842B CN201310390996.7A CN201310390996A CN103422842B CN 103422842 B CN103422842 B CN 103422842B CN 201310390996 A CN201310390996 A CN 201310390996A CN 103422842 B CN103422842 B CN 103422842B
- Authority
- CN
- China
- Prior art keywords
- oil
- surfactant
- profile control
- adjusts
- oil well
- Prior art date
- 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.)
- Active
Links
Abstract
The oil-water well the present invention relates to use when implementing to improve recovery ratio measure to high-water-cut oil-producing well during oil recovery produces blocks up, adjusts, washes technique.This technique includes following process: surfactant rate is introduced into Thief zone position and cleans remaining oil therein, it is then injected into reverse profile control polymer, owing to the viscosity of reverse profile control polymer is higher than surfactant, surfactant can be driven to reservoir deep migration, after oil well resumes production, polymer is in injection water drive under effect, and migrating in the return flow line along surfactant, is formed and block；Reinjecting compound water shutoff agent to carrying out high intensity closure behind above-mentioned Thief zone position, reduce interval and go out liquid ability, near wellbore zone is sealed by application cement therewith, prevents the medicament injected from returning and tells back pit shaft；Finally application polymer solution replaces, and plays the purpose rinsing pit shaft.Displacement efficiency is improved while effectively being blocked in this technique Thief zone position in guarantee interval, fills remaining oil in part tap layer, improves the fuel-displaced potentiality of individual well, improves recovery ratio.
Description
Technical field
The oil well the present invention relates to use when implementing to improve recovery ratio measure to high-water-cut oil-producing well during oil recovery produces blocks up, adjusts, washes technique.
Background technology
Control measures currently for high-water-cut oil-producing well mainly uses compound water shutoff technology, this technology is to utilize compound water shutoff agent to block oil well High water cut interval, reduce interval and go out liquid ability, but this technology is only simple closure, though there is preferable sealing characteristics to high aquifer formation, but can therefore form " region of bypassed oil ", in layer, remaining oil is still trapped in hole, can not be gone out by displacement in follow-up recovery process, oil recovery efficiency cannot improve.
Summary of the invention
In order to improve the recovery ratio of high-water-cut oil-producing well, the present invention provides a kind of oil well to block up, adjust, wash technique.Displacement efficiency is improved while effectively being blocked in this technique Thief zone position in guarantee interval, fills remaining oil in part tap layer, improves the fuel-displaced potentiality of individual well, improves recovery ratio.
The technical scheme is that a kind of oil well blocks up, adjusts, washes technique, it is characterized in that comprising following process: surfactant rate is introduced into Thief zone position and cleans remaining oil therein, it is then injected into reverse profile control polymer, owing to the viscosity of reverse profile control polymer is higher than surfactant, can drive surfactant to reservoir deep migration, after oil well resumes production, polymer is injecting water drive under effect, migrate in return flow line along surfactant, displacement hyposmosis position remaining oil, and forms closure；Reinjecting compound water shutoff agent to carrying out high intensity closure behind above-mentioned Thief zone position, reduce High Permeability Interval and go out liquid ability, near wellbore zone is sealed by application cement therewith, prevents the medicament injected from returning and tells back pit shaft；Finally application polymer solution replaces, and plays the purpose rinsing pit shaft.
Above-mentioned surfactant concentration of aqueous solution is 1.0%；Reversely the aqueous solution ratio of profile control polymer is 8000mg/L.
The usage ratio of above-mentioned surfactant and reverse profile control polymer adjusts according to different sandstone thickness.
The invention has the beneficial effects as follows: above-mentioned oil well blocks up, adjusts, washes Technology is first to inject surfactant solution slug, reverse profile control polymer slug before compound sealing agent slug, by blocking up, adjust, wash a kind of technology mode of three technology integrated application on oil well, expand well end and inject the swept volume of water, reduce oil well end comprehensive water cut, improve displacement efficiency, fully remaining oil in tap layer, improves recovery ratio.Achieve many measures comprehensive control of oil well, this technique both compensate for the deficiency that single compound water-plugging technology " only blocks up and do not washes ", the reverse profile control technology of application has carried out " secondary plugging " to interval again, the most single control measures is made to have obtained further reinforcement, in Ceng, the more difficult remaining oil taped the latent power is gone out by effective displacement, improve displacement efficiency, effect is taped the latent power in measure and reservoir development degree is improved.Oil well blocks up, adjust, wash process technology field test achieves preferable tapping oil potentials through controlling water cut effect, while the high-water-cut oil-producing well heterogeneous body contradiction of regulation old liberated area, utilizing surfactant, reverse profile control agent to make the remaining oil at hyposmosis position effectively be taped the latent power, the rising of oil well comprehensive water cut is controlled.This technique is that low permeability oil field high water-cut development period Tapping Residual Oil provides strong technical support, to improving Periphery Oilfield high water-cut stage development effectiveness and benefit is significant.
Accompanying drawing explanation
Fig. 1 a is that medicinal liquid injects process schematic；
Fig. 1 b is for replying production process schematic diagram.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings:
This oil well blocks up, adjusts, washes Technology is first to inject surfactant solution slug, reverse profile control polymer slug before compound sealing agent slug, by blocking up, adjust, wash a kind of technology mode of three technology integrated application on oil well, expand well end and inject the swept volume of water, reduce oil well end comprehensive water cut, improve displacement efficiency, fully remaining oil in tap layer, improves recovery ratio.
Specifically comprise following process: 1, preposed attributives injects: the medicament of this slug application is surfactant solution and reverse profile control polymer, remaining oil therein is cleaned at the Thief zone position that surfactant rate is introduced in pre-closure interval, it is subsequently injected into reverse profile control polymer, owing to the viscosity of reverse profile control polymer is higher than surfactant, surfactant can be driven to reservoir deep migration, and after oil well resumes production, polymer is injecting water drive under effect, along the return flow line migration that surfactant is cleaned, form closure；2, closure slug injects: the compound water shutoff agent of application can carry out high intensity closure after injecting as main closure medicament, this slug, thus reduce interval and go out liquid ability above-mentioned Thief zone position；3, sealing slug injects: use cement mortar solution to seal near wellbore zone, can prevent the sealing agent injected from returning and tell back pit shaft after cement slurry sets；4, replace slug to inject: application polymer solution carries out excess for squeezing, and replaces in well and the medicament of near wellbore zone, plays the purpose rinsing pit shaft, can prevent the generation of welded tube post phenomenon.
In such scheme, the surfactant injected carries out " cleaning " to the remaining oil at Thief zone position, it is to avoid directly block formation " region of bypassed oil ", owing to the composite plugging agent used is all hydrophilic, remaining oil under " cleaning " will not be resulted in blockage, make plugging effect more preferable.When oil well opening well and making production, owing to high permeability zone is blocked, therefore surfactant can be injected into water punching and takes to not blocked or the hyposmosis position of the most a small amount of sealing agent, thus improves the development degree at hyposmosis position, improves displacement efficiency；When oil well resumes production, the reverse profile control polymer injected is injecting water drive under effect, can backflow to pit shaft end, owing to Thief zone position is blocked by follow-up compound sealing agent, reversely profile control polymer " can open up " new " backflow " passage migration gone out along surfactant, form reverse profile control secondary plugging, thus expand water drive swept volume.Fig. 1 a is that medicinal liquid injects process schematic；Fig. 1 b is for replying production process schematic diagram.
Being determined by scene test, the surfactant solution concentration of individual well application is 1.0%, and reverse profile control polymer solution concentration is 8000mg/L, and surfactant and reverse profile control polymer slug medicament total amount are 50m3.The usage ratio of above-mentioned surfactant and reverse profile control polymer adjusts according to different sandstone thickness, during test, the improvement interval of target oil well is divided into four classes by sandstone thickness, 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 to 1:4,1:1,4:1 and 3:2 respectively, apply different allocation proportions, make individual well regulation effect reach to maximize.
Claims (3)
1. an oil well blocks up, adjusts, washes technique, it is characterised in that include following process: surfactant aqueous solution rate is introduced into Thief zone
Remaining oil therein is cleaned at position, is then injected into reverse profile control aqueous solutions of polymers, due to reverse profile control aqueous solutions of polymers
Viscosity be higher than surfactant aqueous solution, can drive surfactant aqueous solution to reservoir deep migration, after oil well resumes production, reverse profile control
Aqueous solutions of polymers is in injection water drive under effect, and migrating in the return flow line along surfactant aqueous solution, displacement hyposmosis position remains
Excess oil, and form closure；Reinject compound water shutoff agent and above-mentioned Thief zone position is carried out high intensity closure, reduce Thief zone portion
Position goes out liquid ability, and near wellbore zone is sealed by application cement therewith, prevents the medicament injected from returning and tells back pit shaft；Finally application is poly-
Polymer solution replaces, and plays the purpose rinsing pit shaft.
Oil well the most according to claim 1 blocks up, adjusts, washes technique, it is characterised in that: above-mentioned surfactant concentration of aqueous solution is
1.0%, reverse profile control aqueous solutions of polymers concentration is 8000mg/L.
Oil well the most according to claim 1 blocks up, adjusts, washes technique, it is characterised in that: above-mentioned surfactant aqueous solution is with reverse
The usage ratio of profile control aqueous solutions of polymers adjusts according to different sandstone thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310390996.7A CN103422842B (en) | 2013-09-02 | 2013-09-02 | Oil well blocks up, adjusts, washes technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310390996.7A CN103422842B (en) | 2013-09-02 | 2013-09-02 | Oil well blocks up, adjusts, washes technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103422842A CN103422842A (en) | 2013-12-04 |
| CN103422842B true CN103422842B (en) | 2016-08-10 |
Family
ID=49648176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310390996.7A Active CN103422842B (en) | 2013-09-02 | 2013-09-02 | Oil well blocks up, adjusts, washes technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103422842B (en) |
Families Citing this family (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 |
| CN108102725B (en) * | 2018-01-02 | 2022-03-08 | 武汉恩孚水务有限公司 | Pyrolysis speed control method of pyrolysis gasifier |
| 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 |
| CN110552656B (en) * | 2019-08-19 | 2021-09-28 | 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 (4)
| 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 technique adapted for high temperature and high salt oil deposit |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2451641A1 (en) * | 2004-01-09 | 2005-07-09 | Laurie A. Hodgins | Method of placing blocking gel in gas producing formations in order to reduce water influx into the well bore |
-
2013
- 2013-09-02 CN CN201310390996.7A patent/CN103422842B/en active Active
Patent Citations (4)
| 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 technique adapted for high temperature and high salt oil deposit |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103422842A (en) | 2013-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103422842B (en) | Oil well blocks up, adjusts, washes technique | |
| CN104632123B (en) | A kind of ultralow kill-job blocking method | |
| CN103410486B (en) | A kind of three-in-one compound displacement technique for oil field deep transfer drive | |
| CN102876304B (en) | Bottom water plugging agent system and process for horizontal well | |
| CN103161478B (en) | Impulse-type grouting method | |
| CN103321606A (en) | Low-permeability fractured reservoir oil well water-plugging and screening method | |
| CN105927198A (en) | Energy complementing and fracturing stimulation integrated repeated transformation method of dense oil reservoir old well | |
| CN103087699B (en) | Sand-carrying profile control agent composition of fracture-cave type oil deposit and profile control method of profile control agent | |
| CN205154105U (en) | Stifled equipment system is separated in continuous acidizing of little discharge capacity of water injection well | |
| CN105199685A (en) | Water-based drilling fluid for leakage protection and sealing of induced fissures | |
| CN102965091B (en) | Pressure reducing and injection increasing agent used for ultralow permeability oil field and preparation method thereof | |
| CN106194105B (en) | Launch profile control method in blocking agent deep | |
| CN106555565A (en) | A kind of low pressure and easy leaking loses the cementing method that well positive injection is instead squeezed | |
| RU2286446C1 (en) | Acid well bottom zone treatment method | |
| CN101139920A (en) | Dibasic composite horizontal well bottom water plugging technique | |
| CN101915079B (en) | Integrated de-plugging yield increasing process | |
| CN109236259A (en) | A kind of contradictory fracturing process of adjustment water injection well plane water drive | |
| CN103589414B (en) | Zirconium gel dispersion composite oil-displacing system and preparation method thereof | |
| CN103573235A (en) | Acidizing, pressure-decreasing and injection-increasing technique without replacing string for water injection well | |
| CN101435317A (en) | Loss return drop-out cross linked gel plugging process | |
| CN105178910A (en) | Water-plugging process tubing string and method of horizontal wells | |
| CN103628846A (en) | Method for improving CO2 displacement efficiency of low-permeability reservoir | |
| CN107905767A (en) | A kind of online acidization tool of clear antiscale of water injection well | |
| CN104060974B (en) | Deng the mobility displacement of reservoir oil and profile control integrated technique | |
| CN101550333A (en) | Novel complex surface active degradation agent used for releasing the blocking of Polymer/Surfactant flooding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |