Modified expansion-slowing particle profile controlling agent and preparation method as well as application thereof

A technology of slow-swelling particles and profile control agent, applied in chemical instruments and methods, drilling composition, etc., can solve the problems of controllability and operability that are not as good as particle profile control agent, etc., and improve oil reservoir recovery. rate, good deformation ability, and the effect of enhancing stability

Active Publication Date: 2013-07-17
大庆市新万通科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The profile control water shutoff agent has been significantly improved in water absorption expansion, delayed crosslinking, salt and temperature resistance, but the water shutoff agent in this study belongs to the gel type, and the product needs to be injected into the ground to form a gel when used. Controllability and operability are far inferior to granular profile control agents, so it is urgent to develop a granular profile control agent with slow expansion, flexible deformation and easy use

Method used

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  • Modified expansion-slowing particle profile controlling agent and preparation method as well as application thereof
  • Modified expansion-slowing particle profile controlling agent and preparation method as well as application thereof
  • Modified expansion-slowing particle profile controlling agent and preparation method as well as application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of aqueous phase solution: Dissolve 4 kg of acrylamide, 0.01 kg of methylene acrylamide and 0.03 kg of sodium hydroxide into 30 kg of deionized water, stir well, then add 1 kg of Tween-80, and stir until transparent without sediment ;

[0030] (2) Preparation of oil phase system: add 0.02kg diethyl diallylmalonate to 10kg methyl acrylate, stir until completely dissolved, then add 0.001kg azobisisobutyronitrile (AIBN) and 0.05kg Silane coupling agent KH550, continue to stir until completely dissolved, finally add 1kg Span-40, stir until completely dispersed;

[0031] (3) Emulsion system preparation: gradually add the aqueous phase solution obtained in step (1) into the oil phase system obtained in step (2), and fully stir for 2 hours to obtain a polymerized emulsion system;

[0032] (4) Polymerization reaction: feed nitrogen into the above-mentioned emulsion system to replace the oxygen therein, add 0.05kg of ammonium persulfate and 0.05kg of sodium sulf...

Embodiment 2

[0034] (1) Water phase solution preparation: dissolve 20kg hydroxybutyl acrylate and 1kg diallyldimethylammonium chloride into 70kg deionized water, stir well, then add 3kg Tween-60, stir until transparent without sediment ;

[0035] (2) Preparation of oil phase system: add 2kg of diallyl phthalate to 50kg of methyl methacrylate, stir until completely dissolved, then add 0.25kg of benzoyl peroxide and 0.5kg of silane coupling agent KH792 , continue to stir until completely dissolved, finally add 3kg Span-40, stir until completely dispersed;

[0036] (3) Emulsion system preparation: gradually add the aqueous phase solution obtained in step (1) into the oil phase system obtained in step (2), and fully stir for 3 hours to obtain a polymerized emulsion system;

[0037](4) Polymerization reaction: feed nitrogen into the above-mentioned emulsion system to replace the oxygen therein, add 0.5kg of potassium persulfate and 0.28kg of sodium sulfite into the emulsion system, stir evenly...

Embodiment 3

[0039] (1) Preparation of aqueous phase solution: dissolve 10kg of methacryloyloxyethyltrimethylammonium chloride and 0.1kg of polyethylene glycol diacrylate into 40kg of deionized water, stir well and then add 1kg of Tween-20 , stirred until transparent without sediment;

[0040] (2) Preparation of oil phase system: add 0.1kg of diallyl isophthalate to 20kg of 2-ethylhexyl acrylate, stir until completely dissolved, then add 0.005kg of benzoyl peroxide and 0.1kg of titanium Ester coupling agent, continue to stir until it is completely dissolved, and finally add 1kg of sodium dodecylsulfonate, and stir until it is completely dispersed;

[0041] (3) Emulsion system preparation: gradually add the aqueous phase solution obtained in step (1) into the oil phase system obtained in step (2), and fully stir for 2.5 hours to obtain a polymerized emulsion system;

[0042] (4) Polymerization reaction: Introduce nitrogen gas into the above emulsion system to replace the oxygen in it, add ...

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Abstract

The invention relates to a modified expansion-slowing particle profile controlling agent used for deep profile controlling and flooding of an oilfield and water plugging of an oil well, a preparation method thereof and application in the field of oil exploitation. The modified expansion-slowing particle profile controlling agent comprises the following components in parts by weight: 4-20 parts of a water-soluble monomer, 10-50 parts of an oil-soluble monomer, 0.01-1 part of a water-soluble cross-linking agent, 0.02-2 parts of an oil-soluble cross-linking agent, 1-10 parts of a surfactant, 0.05-0.5 part of a water-soluble initiating agent, 0.001-0.25 part of an oil-soluble initiating agent, 0.05-0.5 part of a coupling agent, 0-5 parts of alkaline and 30-70 parts of de-ionized water. The modified expansion-slowing particle profile controlling agent overcomes the disadvantages of the conventional expansion type particles that water-absorbing expansion speed is high, the particles after expanding are too hard, and the particles cannot be used for deep profile controlling of the oilfield; the particle profile controlling agent is applied to water plugging of the oil well and deep fluid diversion of the oilfield with a high water content, improves displacement effects of water flooding, polymer flooding and surfactant flooding, and increases recovery efficiency of oil accumulation.

Description

technical field [0001] The invention relates to a profile control and water shutoff agent, in particular to a granular profile control agent with slow expansion performance for profile control and flooding in deep oil fields and water shutoff in oil wells, its preparation method and its application in the field of oil exploitation . Background technique [0002] Due to the heterogeneity of the formation, the flow profile of the oil displacement agent (such as water) in the formation is not uniform. In order to increase the sweep coefficient of the oil displacement agent and increase the recovery factor, it is necessary to adjust its flow profile, that is, profile control, and the profile control agent (profile control agent, Zhao Fulin, "Journal of Petroleum University (Natural Science Edition) "April 1990). [0003] With the continuous development of the petroleum industry, more and more new profile control and flooding agents have been applied in oil fields. The water f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/58
Inventor 吴凤祥
Owner 大庆市新万通科技开发有限公司
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