CN104212426A - Wrapped profile control degradation agent - Google Patents
Wrapped profile control degradation agent Download PDFInfo
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- CN104212426A CN104212426A CN201310220227.2A CN201310220227A CN104212426A CN 104212426 A CN104212426 A CN 104212426A CN 201310220227 A CN201310220227 A CN 201310220227A CN 104212426 A CN104212426 A CN 104212426A
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- Prior art keywords
- profile control
- degradation agents
- agent
- degradation
- control degradation
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/536—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning characterised by their form or by the form of their components, e.g. encapsulated material
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention relates to a wrapped profile control degradation agent, which is composed of the following components by weight: 1% of an oleophylic surfactant, 0.5% of a hydrophilic surfactant, 0.01% of a stabilizer, 0.2% of a synergistic agent, 5% of a degradation agent, 60% of an organic solvent, and 33.29% of an inorganic solvent. The profile control degradation agent is prepared according to the safety performance, stability and retardation principles of profile control degradation agents, and brings the coordinating effect of all substances into fully play. By slow release of the degradation agent, and prolonging of the contact time with a profile control agent and the effective time, the purpose of retardation can be reached. The wrapped profile control degradation agent system has the characteristics of complete degradation of polymers and retardation rate up to 80%. At the same time, being a liquid, the system has the advantages of good deformation performance, no blockage to the reservoir pore throat, no corrosion on tubular columns and good corrosion resistance, and is suitable for removing deep blockage of a oil-water well profile control agent crosslinked polymer. The process is simple, and the construction is safe.
Description
Technical field
The present invention relates to the degradation agents of a kind of oil field profile control cross-linked polymer, and it is wrapped up, achieve the stable and slow of profile control degradation agents, reach the object removed profile control back production well, recover the blocking of water injection well deep electrical structure.
Background technology
In NW Hebei, shallow oil reservoir nonuniformity is strong, and inject cross-linked polymer to carry out profile control be improve block production profile in good time, improves one of important means of water flooding effectiveness.Because of the delay of a large amount of amendment around pit shaft, after causing profile control well back production, recovery water filling, not production fluid, affects the modification scenario in block later stage.Current elimination amendment delay mainly adopts strong oxidizer to degrade on the impact of reservoir pore space rate of permeation and realizes.It is poor that strong oxidizer has self stability, meets the reactions such as acid, reductive agent, cause fire or blast; See that light is heated easily to decompose, give off poisonous gas; React and inactivation with the weak reductant in ground environment, can not effectively be oxidized for a long time, amendment of degrading.Strong oxidizer system is for removing back production well, recovering the blocking of Profile Control in Injection Well agent, there is construction risk, system stability is poor, speed of response is fast, working lipe is short, can only to degrade the amendment of nearly well, very micro-to well amendment far away effect, can not meet profile control back production well, recover the requirement that amendment blocking removed by water injection well.
Summary of the invention
The object of the invention is to provide a kind of coated profile control degradation agents, selecting to possess reducing substances is that a kind of safety performance of degradation agents main component is high, stability is strong, the amendment degraded system that slow ability is strong, be used for substituting oxidation agent system conventional at present, reduce because the week reduction on stratum is to the consumption of degradation agents, solve profile control back production, recover water injection well pit shaft and be detained because of around a large amount of cross-linked polymer the blockage problem caused, recover the normal production of such well.
Coated profile control degradation agents of the present invention, 100% is composed of the following components by weight:
Lipophilic surfactant 1%
Hydrophilic surfactant 0.5%
Stablizer 0.01%
Synergistic agent 0.2%
Degradation agents 5%
Organic solvent 60%
Inorganic solvent 33.29%.
Wherein hydrophilic surfactant is polyoxyethylene sorbitan fatty acid ester and lipophilic surfactant sorbitan fatty acid ester, and stablizer is 2-hydroxyl-1,2,3-is three acid, and synergistic agent is sodium-chlor, and degradation agents is ferrous sulfate, organic solvent is white oil, and inorganic solvent is tap water.
The mechanism of action: safety, stable reduction system utilize reductibility to degrade to amendment.Composite hydrophilic surfactant, lipophilic surfactant strengthen interfacial activity and the interfacial film strength of parcel liquid and degraded system by reducing dynamical interfacial tension, improve the stability of parcel system.Degraded system after parcel extends the duration of contact with amendment by slow releasing degradation agents, extends action time, reaches slow object.
Advantage:
1, this system is applicable to the de-plugging of oil and water well amendment deep blocking, and technique is simple, construction safety;
2, this inclusion is liquid, has deformation performance good, does not block reservoir pore throat;
3, this system energy thoroughly degradation polymer, retardative property is good simultaneously, and slow rate reaches 80%;
4, this system is corrosion-free to tubing string, and antiseptic property is good;
5, be applicable to there is cross-linked polymer oil and water well removing clog in deep reservoir, configuration is simple, use safety.
Embodiment
Wherein hydrophilic surfactant is polyoxyethylene sorbitan fatty acid ester [tween-80] and lipophilic surfactant sorbitan fatty acid ester [Arlacel-80], stablizer is 2-hydroxyl-1,2, oneself three acid [citric acid] of 3-, synergistic agent is sodium-chlor, degradation agents is ferrous sulfate, and organic solvent is white oil (the positive isoparaffin mixture of C16-C31), and inorganic solvent is tap water.
Embodiment 1:
Component and the weight proportion of described coated profile control degradation agents are: lipophilic surfactant 1%, hydrophilic surfactant 0.5%, stablizer 0.01%, synergistic agent 0.2%, degradation agents 5%, organic solvent 60%, inorganic solvent 33.29%.
First stablizer is added inorganic solvent during preparation fully to dissolve, then degradation agents is added in stabiliser solution fully dissolve, then mix with other components in formula.
For scene amendment, get above-mentioned degradation agents of preparing and carry out degradation experiment, investigate the slow and degradation property of coated profile control degradation agents under formation temperature (60 DEG C), data are as follows:
The slow degradation property table of table 1 formation temperature (60 DEG C) coated profile control degradation agents
It is degradable that coated profile control degradation agents completes amendment for 6 hours, and the soltion viscosity after degraded is 1% of the former viscosity of amendment, the slow effect of system improves 80% than the degradation agents do not wrapped up, and after leaving standstill 73h, slow degradation effect is constant.
Embodiment 2:
G115-5 is a bite profile control well of high shallow North Ng12 substratum, and this well starts profile control transfer drive, accumulation profile control amount 12155m in April, 2007
3.In October, 2011 turns adopts, and turns not production fluid after adopting, and for recovering this well production rate as early as possible, prepares coated profile control degradation agents 120m according to the following formulation
3non-coated profile control degradation agents 180m
3.Wherein coated profile control degradation agents formula is: lipophilic surfactant 1%; Hydrophilic surfactant 0.5%; Stablizer 0.01%; Synergistic agent 0.2%; Degradation agents 5%; Organic solvent 60%; Inorganic solvent 33.29%; Non-coated profile control degradation agents formula is: stablizer 0.01%; Degradation agents 5%.After having degraded, day at initial stage production fluid 14.6m
3, stable yield, degrades successfully.
Claims (8)
1. a coated profile control degradation agents, is characterized in that: 100% is composed of the following components by weight,
Lipophilic surfactant 1%
Hydrophilic surfactant 0.5%
Stablizer 0.01%
Synergistic agent 0.2%
Degradation agents 5%
Organic solvent 60%
Inorganic solvent 33.29%.
2. coated profile control degradation agents according to claim 1, is characterized in that: described lipophilic surfactant is sorbitan fatty acid monoester.
3. coated profile control degradation agents according to claim 1, is characterized in that: described hydrophilic surfactant is polyoxyethylene sorbitan fatty acid ester.
4. coated profile control degradation agents according to claim 1, is characterized in that: described stablizer is (2-hydroxyl-1,2,3-is three acid).
5. coated profile control degradation agents according to claim 1, is characterized in that: described synergistic agent is sodium-chlor.
6. coated profile control degradation agents according to claim 1, is characterized in that: described degradation agents is ferrous sulfate.
7. coated profile control degradation agents according to claim 1, is characterized in that: described organic solvent is white oil.
8. coated profile control degradation agents according to claim 1, is characterized in that: described inorganic solvent is tap water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310220227.2A CN104212426A (en) | 2013-06-05 | 2013-06-05 | Wrapped profile control degradation agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310220227.2A CN104212426A (en) | 2013-06-05 | 2013-06-05 | Wrapped profile control degradation agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104212426A true CN104212426A (en) | 2014-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310220227.2A Pending CN104212426A (en) | 2013-06-05 | 2013-06-05 | Wrapped profile control degradation agent |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105254145A (en) * | 2015-08-18 | 2016-01-20 | 海南卓越生物有限公司 | Capsule-type active calcium emulsion and preparation method thereof |
| CN106366614A (en) * | 2016-09-08 | 2017-02-01 | 广西南宁桂尔创环保科技有限公司 | Novel environment-friendly foam plastic |
| CN106398164A (en) * | 2016-09-08 | 2017-02-15 | 广西南宁桂尔创环保科技有限公司 | Environmental-friendly novel foamed plastic |
| CN106398165A (en) * | 2016-09-08 | 2017-02-15 | 广西南宁桂尔创环保科技有限公司 | Environment-friendly foamed plastic |
| CN106398167A (en) * | 2016-09-08 | 2017-02-15 | 广西南宁桂尔创环保科技有限公司 | Novel foamed plastic |
| CN106398166A (en) * | 2016-09-08 | 2017-02-15 | 广西南宁桂尔创环保科技有限公司 | High performance foam plastic |
| CN106433081A (en) * | 2016-09-08 | 2017-02-22 | 广西南宁桂尔创环保科技有限公司 | Environment-friendly foamed plastic with high performances |
| CN109294543A (en) * | 2018-10-22 | 2019-02-01 | 唐山冀油瑞丰化工有限公司 | A kind of profile control degradation agent and preparation method thereof |
| CN115386353A (en) * | 2021-05-25 | 2022-11-25 | 中国石油天然气集团有限公司 | Hypotonic oil field profile control and pressure boosting water well pressure reducing and injection increasing working fluid and preparation method thereof |
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| US20040094300A1 (en) * | 2002-08-26 | 2004-05-20 | Schlumberger Technology Corp. | Dissolving Filter Cake |
| CN101196109A (en) * | 2007-12-27 | 2008-06-11 | 大庆石油学院 | Three-segment type block releasing technique for oil layer |
| CN101550333A (en) * | 2009-05-20 | 2009-10-07 | 大庆开发区东油新技术有限公司 | Novel complex surface active degradation agent used for releasing the blocking of Polymer/Surfactant flooding |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105254145A (en) * | 2015-08-18 | 2016-01-20 | 海南卓越生物有限公司 | Capsule-type active calcium emulsion and preparation method thereof |
| CN106366614A (en) * | 2016-09-08 | 2017-02-01 | 广西南宁桂尔创环保科技有限公司 | Novel environment-friendly foam plastic |
| CN106398164A (en) * | 2016-09-08 | 2017-02-15 | 广西南宁桂尔创环保科技有限公司 | Environmental-friendly novel foamed plastic |
| CN106398165A (en) * | 2016-09-08 | 2017-02-15 | 广西南宁桂尔创环保科技有限公司 | Environment-friendly foamed plastic |
| CN106398167A (en) * | 2016-09-08 | 2017-02-15 | 广西南宁桂尔创环保科技有限公司 | Novel foamed plastic |
| CN106398166A (en) * | 2016-09-08 | 2017-02-15 | 广西南宁桂尔创环保科技有限公司 | High performance foam plastic |
| CN106433081A (en) * | 2016-09-08 | 2017-02-22 | 广西南宁桂尔创环保科技有限公司 | Environment-friendly foamed plastic with high performances |
| CN109294543A (en) * | 2018-10-22 | 2019-02-01 | 唐山冀油瑞丰化工有限公司 | A kind of profile control degradation agent and preparation method thereof |
| CN109294543B (en) * | 2018-10-22 | 2020-11-27 | 唐山冀油瑞丰化工有限公司 | Profile control degradation agent and preparation method thereof |
| CN115386353A (en) * | 2021-05-25 | 2022-11-25 | 中国石油天然气集团有限公司 | Hypotonic oil field profile control and pressure boosting water well pressure reducing and injection increasing working fluid and preparation method thereof |
| CN115386353B (en) * | 2021-05-25 | 2024-01-23 | 中国石油天然气集团有限公司 | Low-permeability oil Tian Diaopou booster well depressurization and injection increasing working fluid and preparation method thereof |
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Application publication date: 20141217 |
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