Integrated styrene acrylic latex, preparation method and application

A technology of styrene-acrylic latex and large monomers, which is applied in the field of oil drilling and cementing, can solve problems such as difficult adjustments, and achieve the effects of improving cementing quality, reducing fluid loss, and reducing the difficulty of adjustments

Inactive Publication Date: 2019-03-19
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, styrene-butadiene latex needs to be additionally compounded with corresponding stabilizers, and styrene-butadiene latex is relatively sensitive in use, and it is difficult to adjust

Method used

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  • Integrated styrene acrylic latex, preparation method and application
  • Integrated styrene acrylic latex, preparation method and application
  • Integrated styrene acrylic latex, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Add 750kg deionized water, 20kg alkylsulfonate anionic emulsifier SCAY-10 (self-made by the Academy of Engineering), 20kg nonionic emulsifier octylphenol polyoxyethylene ether TX-50 in the reactor (raw material tank) with stirring, 30g anionic emulsifier nonylphenol polyoxyethylene ammonium sulfate CO458, 40g anionic emulsifier sodium dodecylbenzenesulfonate, 600kg styrene, 300kg butyl acrylate, 12kg crosslinking agent divinylbenzene, 60kg functional mono Body NN dimethylacrylamide, 50kg allyl polyoxyethylene ether macromonomer HPEG2400, fully sheared and pre-emulsified for 1 hour before use. Add initiator sodium persulfate 10kg in another raw material dropping tank simultaneously, deionized water 650kg, as initiator component.

[0066] Put 200kg of deionized water into the reactor, raise the temperature to 90°C, add 10% of the above-mentioned pre-emulsion, 4% of the above-mentioned initiator solution, and after 20 to 30 minutes of reaction, start to drop the remaining ...

Embodiment 2

[0068] Add 750kg deionized water, 20kg alkylsulfonate anionic emulsifier SCAY-10 (self-made by the Engineering Institute) in the stirred reactor (raw material tank), 20kg nonionic emulsifier octylphenol polyoxyethylene ether OP-10, 30g anionic emulsifier nonylphenol polyoxyethylene ammonium sulfate CO458, 40g anionic emulsifier sodium dodecylbenzenesulfonate, 500kg styrene, 400kg butyl acrylate, 12kg crosslinking agent divinylbenzene, 60kg functional mono 2-acrylamide-2-methylpropanesulfonic acid AMPS, 50kg allyl polyoxyethylene ether macromonomer TPEG1300, fully sheared and pre-emulsified for 1 hour before use. Add initiator sodium persulfate 10kg in another raw material dropping tank simultaneously, deionized water 650kg, as initiator component.

[0069] Put 200kg of deionized water into the reactor, raise the temperature to 90°C, add 10% of the above-mentioned pre-emulsion, 4% of the above-mentioned initiator solution, and after 20 to 30 minutes of reaction, start to drop t...

Embodiment 3

[0071] Add 750kg deionized water, 30kg alkylsulfonate anionic emulsifier SCAY-10 (self-made by the Engineering Institute) in the stirred reactor (raw material tank), 10kg nonionic emulsifier octylphenol polyoxyethylene ether OP-10, 30g anionic emulsifier nonylphenol polyoxyethylene ammonium sulfate CO458, 40g anionic emulsifier sodium dodecylsulfonate, 300kg styrene, 300kg 2-ethylhexyl acrylate, 300kg dodecyl acrylate , 12kg cross-linking agent divinylbenzene, 60kg 2-acrylamide-2-methylpropanesulfonic acid AMPS, 50kg allyl polyoxyethylene ether macromonomer HPEG2400, fully sheared and pre-emulsified for 1 hour for use. Add initiator sodium persulfate 15kg in another raw material dropping tank simultaneously, deionized water 650kg, as initiator component.

[0072] Put 200kg of deionized water into the reactor, raise the temperature to 90°C, add 10% of the above-mentioned pre-emulsion, 4% of the above-mentioned initiator solution, and after 20 to 30 minutes of reaction, start to...

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Abstract

The invention discloses integrated styrene acrylic latex, a preparation method and an application. The integrated styrene acrylic latex comprises, in weight percent, 10-40% of vinyl benzene, 8-30% ofalkyl methacrylate, 1-5% of allyl polyether macromonomers, 1-10% of functional water-soluble monomers, 1-5% of anionic emulsifiers, 0.5-2% of non-ionic emulsifiers, 0.1-2% of crosslinking agents, 0.05-2% of chain transfer agents, 0.5-3% of initiators and the rest deionized water. The integrated styrene acrylic latex is used without additionally combining stabilizing agents, the cementation strength between a first cementation plane and a second cementation plane of well cementation can be improved, the penetration rate of cement stones is reduced, hydrocarbon channeling is decreased, the elastic toughness of the cement stones can be increased, cracking degree of the cement stones is reduced in well cementing follow-up operations such as perforation and pressing crack, overall stability ofa cement ring is kept, and well cementation quality is improved.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling and cementing, and more specifically relates to an integrated styrene-acrylic latex, a preparation method and an application in well cementing. Background technique [0002] As the exploration of oil and gas resources in my country continues to expand to areas with deep complex geological structures, the cementing of deep and ultra-deep wells is facing the problem of high temperature and high pressure to prevent gas channeling. The latex cement slurry added with latex admixture has the characteristics of high temperature resistance, oil and gas water channeling, water loss reduction and protection of oil and gas layers, and can effectively improve the cementing quality of deep and ultra-deep wells. It is currently recognized at home and abroad as an anti-channeling cement slurry. Cement slurry system with excellent performance. [0003] At present, the latex cement slurry used in oil f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F212/08C08F220/18C08F212/36C08F220/54C08F2/26C08F2/30C09K8/467
CPCC08F2/26C08F2/30C08F283/065C09K8/467C08F212/08C08F220/54
Inventor 王其春孔祥明汪晓静曾敏刘伟
Owner CHINA PETROLEUM & CHEM CORP
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