CN103193906B - Preparation method of delayed-coagulation acrylamide single body profile control agent - Google Patents
Preparation method of delayed-coagulation acrylamide single body profile control agent Download PDFInfo
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- CN103193906B CN103193906B CN201310110177.2A CN201310110177A CN103193906B CN 103193906 B CN103193906 B CN 103193906B CN 201310110177 A CN201310110177 A CN 201310110177A CN 103193906 B CN103193906 B CN 103193906B
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Abstract
The invention relates to a preparation method of a delayed-coagulation acrylamide single body profile control agent, which relates to the technical field of the petrochemical industry. The delayed-coagulation acrylamide single body profile control agent is formed by mixing an acrylamide single body, initiator, amine crosslinking agent, stabilizer, assistant and fresh water. The preparation method is low in cost, shearing-resisting, simple in construction process, capable of delaying the coagulation, long in initial gelatinizing time, high in final set strength, good in selectivity, ingressive, firm to seal, abrasion-resisting, long in validity, capable of reducing the pollution on an oil layer, effective for coordinating the contradiction of the interlayer and the plane and capable of realizing the purpose of deep profile control. The acrylamide single body delayed-coagulation profile control agent is used for adjusting a water absorption profile of a water injection well in the water injection development process of an oil field and sealing a fluid channeling passage, a high-permeable layer and a water outlet layer of the oil well, and can effectively increase the water drive swept volume and increase the oil recovery.
Description
Technical field
The present invention relates to technical field of petrochemical industry, adjust profile-log of water injection especially in water flooding process, the preparation technology of the plugging agent of fluid-channeling channel, high permeability formation and well water layer between shutoff oil and water well.
Background technology
The most of oil field of China adopts early-stage waterflooding, enter high water cut rate at present, worse and worse, conventional plugging technology is also difficult to the needs adapting to Complex Reservoir profile control and water plugging to the well stimulation effect of widespread use under original annotation water condition, more and more higher to the requirement of profile control and water plugging technology in production.So, be badly in need of finding effective novel method, improve Used for Oilfield Development During High Water-cut Stage effect.The height of water displacing oil recovery ratio depends on the macroscopical sweep efficiency and microscopic oil displacement efficiency that inject water, therefore one of main path improving waterflooding is exactly improve sweep efficiency.Its principle is the distribution by changing subsurface pressure field, makes injection water feed through to high oil saturation region.Thus the crude oil in residual oil area is displaced.Conventional method has: segmentation series of strata, optimized well pattern and layout, adjust injection and extraction system, injection is adopted by force, adjust intake profile, oil reservoir deep fluid changed course etc.These methods can reduce water-oil ratio significantly, improve the recovery ratio of crude oil.
In water drive and polymer flooding process, because the nonuniformity on stratum is serious.Make injection water and polymers soln along most permeable zone, crack, channelling layer, directly enter oil well output, cause involving degree low, middle low permeability layer oil displacement efficiency is poor, has had a strong impact on the development effectiveness of water drive or polymer flooding.Fundamentally to address this problem, the way of profile control and water plugging just must be adopted to improve intake profile.
At present, the retarding crosslinked system that China grows up can be divided three classes by the type of linking agent: one be can with organic aldehyde crosslinking agent of amide group effect in Water-soluble Polymer Molecules; Another kind of be can with the transition metal organic crosslinking agent of hydroxy-acid group effect in polymer molecule; Simultaneously 3rd class the former two is used.
Domestic and international chemical profile control agent of a great variety, from the situation of practical application, is polymer gel profile control agent the most widely.Wherein representative HPAM-high volence metal ion, as Cr(III), Al(III), Zr(IV) system and the organic phenolic system of HPAM-.Can find out, all apply to the hydro-polyacrylamide of different molecular weight in these systems as host.This kind of host is used to relate to the problem of the following aspects: one, owing to being use high molecular polymer, generally in advance these powder be joined in fresh water in batches in use, long-time stirring, then experiences process that is swelling and that dissolve, operates more loaded down with trivial details; Two, the molecular weight of general polyacrylamide is higher, adjusts stifled effect better.And the price of the polyacrylamide of high molecular is high by three, after large in injection process medium viscosity slitter loss rate after polymer dissolution, gel-forming property, plastic intensity be affected greatly, stratum shearing, stratum viscosity retention ratio is low; Four, these high volence metal ion system gelation times are fast usually, initial viscosity is high, easy polluted reservoir and be unfavorable for entering oil reservoir deep.
Be the plugging agent of host both at home and abroad with acrylamide, gelation time is only several hours; Construction consumption is low, adjusts stifled radius little; , plastic strong to external condition susceptibility such as temperature is fast, and construction risk is large, and the plastic often in injection process in ground tanks and pit shaft, causes the accident.Relevant acrylic amide plugging agent report seldom at present.
Summary of the invention
The object of the invention is that proposing one can overcome prior art deficiency, and cost is low, anti-shearing, construction technology simple, delays polymerization, the preparation method of the delayed-coagulation acrylamide single body profile control agent that intensity is high after initial gelation time length, plastic.
Technical solution of the present invention is: acrylamide monomers, initiator, amine cross-linking agent, stablizer, auxiliary agent and mixing of fresh water are formed.
Acrylamide monomers of the present invention, initiator, amine cross-linking agent, stablizer and auxiliary agent account for 2 ~ 6%, 0.01 ~ 0.05%, 0.05 ~ 1%, 0.5 ~ 3% and 0.5 ~ 2% of mixing total mass respectively.
The system PH that above technique is formed is 6-8, under the envrionment conditions of temperature 60 ~ 90 DEG C, and gelation time 1 ~ 20 day.
Cost of the present invention is low, anti-shearing, construction technology is simple, delay polymerization, initial gelation time is long, final strength is high, selectivity is good, enter go, seal firm, resistance to erosion, validity period are long, reduce oil layer pollution, between effective adjustment layer and horizontal contradiction, thus reach the object of deep profile controlling.The present invention is a kind of novel propylene amide monomer class slow setting profile control, plugging agent, for adjusting profile-log of water injection in water flooding process, fluid-channeling channel, high permeability formation and well water layer between shutoff oil and water well, can effectively improve water drive swept volume, improves oil recovery factor.
Acrylamide monomers used in the present invention be in acrylamide, Methacrylamide, vinyl cyanide, vinylformic acid or acrylate at least any one.
Initiator used in the present invention is: be 2 ~ 5:1 over cure acids initiator of carrying out mixing and phenols reagent with mass ratio.Wherein, over cure acids initiator is: Ammonium Persulfate 98.5, Sodium Persulfate or Potassium Persulphate; Phenols reagent is 2,6 ditertiary butyl p cresol, phenol, Pyrogentisinic Acid or 2,2
,-binaphthol, is preferably 2,2
,-binaphthol.
Amine cross-linking agent used in the present invention is: any at least one in diethylenetriamine, Triethylenetetramine (TETA), hexamethylenetetramine, urotropine, ammoniacal liquor or dimethylethanolamine.
Stablizer used in the present invention is Thiovanic acid ethanol thiocarbamide.
Auxiliary agent used in the present invention is any at least one in Thiovanic acid, acetic acid or propyl carbinol.
Embodiment
One, initiator is made by oneself:
With mass ratio for 2 ~ 5:1, over cure acids initiator is mixed with phenols reagent.
The over cure acids initiator adopted can be: Ammonium Persulfate 98.5, Sodium Persulfate or Potassium Persulphate.
The phenols reagent adopted can be 2,6 ditertiary butyl p cresol, phenol, Pyrogentisinic Acid or 2,2
,-binaphthol, is preferably 2,2
,-binaphthol.
Two, plugging agent is prepared:
First acrylamide is made into the aqueous solution, more directly adds homemade initiator, and then add linking agent, stablizer, auxiliary agent and fresh water.
Adopt acrylamide monomers can be in acrylamide, Methacrylamide, vinyl cyanide, vinylformic acid or acrylate at least any one.
The amine cross-linking agent adopted can be: any at least one in diethylenetriamine, Triethylenetetramine (TETA), hexamethylenetetramine, urotropine, ammoniacal liquor or dimethylethanolamine.
The stablizer adopted can be Thiovanic acid ethanol thiocarbamide.
The auxiliary agent adopted can be any at least one in Thiovanic acid, acetic acid or propyl carbinol.
Control the add-on of each raw material, account for 2 ~ 6%, 0.01 ~ 0.05%, 0.05 ~ 1%, 0.5 ~ 3% and 0.5 ~ 2% of mixing total mass respectively to make acrylamide monomers, initiator, amine cross-linking agent, stablizer and auxiliary agent.
Three, apply:
When acrylamide monomers, initiator, amine cross-linking agent, stablizer and auxiliary agent account for 4%, 0.02%, 0.08%, 1%, 2% of mixing total mass respectively, under 70 DEG C of envrionment conditionss, first 10 days whole systems as just like the water can unrestricted flow, presetting period is 11 days, final setting time is 20 days, and intensity reaches F level.
When acrylamide monomers, initiator, amine cross-linking agent, stablizer and auxiliary agent account for 3%, 0.03%, 0.06%, 1%, 1% of mixing total mass respectively, under 90 DEG C of envrionment conditionss, first 7 days whole systems as just like the water can unrestricted flow, presetting period is 8 days, final setting time is 16 days, and intensity reaches G level.
Claims (6)
1. a preparation method for delayed-coagulation acrylamide single body profile control agent, is formed acrylamide monomers, initiator, amine cross-linking agent, stablizer, auxiliary agent and mixing of fresh water; It is characterized in that described acrylamide monomers, initiator, amine cross-linking agent, stablizer and auxiliary agent account for 2 ~ 6%, 0.01 ~ 0.05%, 0.05 ~ 1%, 0.5 ~ 3% and 0.5 ~ 2% of mixing total mass respectively.
2. preparation method according to claim 1, it is characterized in that described acrylamide monomers be in acrylamide, Methacrylamide, vinyl cyanide, vinylformic acid or acrylate at least any one.
3. preparation method according to claim 1, is characterized in that described initiator is: be 2 ~ 5:1 over cure acids initiator of carrying out mixing and phenols reagent with mass ratio, and described over cure acids initiator is: Ammonium Persulfate 98.5, Sodium Persulfate or Potassium Persulphate; Described phenols reagent is 2,6 ditertiary butyl p cresol, phenol, Pyrogentisinic Acid or 2,2
,-binaphthol.
4. preparation method according to claim 3, is characterized in that described phenols reagent is 2,2
,-binaphthol.
5. preparation method according to claim 1, is characterized in that described amine cross-linking agent is: any at least one in diethylenetriamine, Triethylenetetramine (TETA), hexamethylenetetramine, urotropine, ammoniacal liquor or dimethylethanolamine.
6. preparation method according to claim 1, is characterized in that described auxiliary agent is any at least one in Thiovanic acid, acetic acid or propyl carbinol.
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| CN201310110177.2A CN103193906B (en) | 2013-04-01 | 2013-04-01 | Preparation method of delayed-coagulation acrylamide single body profile control agent |
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| CN103193906B true CN103193906B (en) | 2015-06-24 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103666423B (en) * | 2013-12-04 | 2016-05-25 | 天津大港油田滨港集团博弘石油化工有限公司 | A kind of gel-type profile control agent that injects |
| CN104017135B (en) * | 2014-06-20 | 2017-01-11 | 武汉工程大学 | Method for preparing microbial polysaccharide modified copolymer gel plugging agent |
| CN105154054B (en) * | 2015-08-07 | 2017-12-22 | 中国石油化工股份有限公司胜利油田分公司勘探开发研究院 | A kind of tertiary amine participates in crosslinking polymer oil displacement agent of synthesis and preparation method thereof |
| CN107686723B (en) * | 2017-08-11 | 2020-03-10 | 中国石油天然气股份有限公司 | CO (carbon monoxide)2Response in-situ gel channeling sealing sol and preparation method and application thereof |
| CN113773821B (en) * | 2020-06-10 | 2023-01-06 | 中国石油天然气股份有限公司 | High-temperature blockage-regulating cleanup additive and preparation method and application thereof |
| CN115991980B (en) * | 2021-10-19 | 2024-06-25 | 中国石油化工股份有限公司 | Profile control agent for oilfield water injection well and preparation method thereof |
| CN116554846B (en) * | 2023-01-02 | 2024-07-19 | 西南石油大学 | Gel plugging agent suitable for hypotonic ultra-hypotonic fractured reservoir and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102382244A (en) * | 2011-08-17 | 2012-03-21 | 西南石油大学 | Gelation-delayed in-situ polymerized water shutoff gel for high-temperature reservoirs |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102382244A (en) * | 2011-08-17 | 2012-03-21 | 西南石油大学 | Gelation-delayed in-situ polymerized water shutoff gel for high-temperature reservoirs |
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