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Demulsification and discharge aiding agent and preparation method thereof as well as treatment method of oil field reservoir

A technology of demulsification aid and drainage agent and active agent, which is applied in the direction of chemical instruments and methods, earthwork drilling, drilling compositions, etc., which can solve the problem of ineffective mitigation of oilfield reservoir water damage and inability to greatly reduce the interface Tension, reduce surface tension and other issues, to achieve the effect of alleviating water damage, low interfacial tension, and inhibiting clay expansion

Active Publication Date: 2015-11-18
国勘石油技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the performance of the drainage aids for fracturing is relatively single at present. While reducing the surface tension, the interfacial tension cannot be greatly reduced, and the water damage caused by the fracturing fluid into the well cannot be effectively alleviated.

Method used

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  • Demulsification and discharge aiding agent and preparation method thereof as well as treatment method of oil field reservoir
  • Demulsification and discharge aiding agent and preparation method thereof as well as treatment method of oil field reservoir

Examples

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preparation example Construction

[0027] According to another aspect of the present invention, there is provided a method for preparing a demulsification aid, comprising the following steps: polymerizing polyfluorinated ethylene oxide and propylene glycol to form a compound with structural formula I, wherein structural formula I is The structural formula II of polyfluorine substituted oxirane is R is a hydrocarbon group substituted by two or more fluorine atoms, n is 16-18; the fluorocarbon surfactant and the cationic gemini surfactant are mixed.

[0028] Because the above-mentioned preparation method of the present invention is by having the compound of the application structural formula I to mix with fluorocarbon surfactant and cationic gemini surfactant, to form demulsification aid drainage agent, this compound not only has demulsification and drainage aid simultaneously It can also effectively integrate and synergize additives such as fluorocarbon surfactants and cationic gemini surfactants, so that the de...

Embodiment 1

[0038] The demulsification and drainage aid provided by the present embodiment includes a structural formula of Compounds, anionic fluorocarbon surfactants (manufactured by DuPont, model 9361) and cationic gemini surfactants (manufactured by Hubei Deke, model HL-03), wherein R is 1,3-difluoropropyl , n is 16; the weight percentage of the compound is 14%, the weight percentage of the fluorocarbon surfactant is 30%, and the weight percentage of the cationic gemini surfactant is 30%.

Embodiment 2

[0040] The demulsification and drainage aid provided by the present embodiment includes a structural formula of Compounds, cationic fluorocarbon surfactants (produced by DuPont, model 9361), cationic gemini surfactants (produced by Hubei Deke, model HL-03) and methyl tert-butyl ether, wherein R is 1 , 1-difluoroethyl, n is 17; the weight percentage of the compound is 15%, the weight percentage of the fluorocarbon surfactant is 32%, the weight percentage of the cationic gemini surfactant is 32%, and the weight percentage of the small molecular organic matter The percentage is 16%.

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Abstract

The invention provides a demulsification and discharge aiding agent and a preparation method thereof as well as a treatment method of an oil field reservoir. The demulsification and discharge aiding agent comprises a compound with a structure formula (I) shown in the specification, a fluorocarbon surfactant and a cationic gemini surfactant, wherein R represents alkyl substituted with two or more fluorine atoms, and n ranges from 16 to 18. The demulsification and discharge aiding agent not only has functions of demulsification and discharge aiding and also has smaller surface tension, smaller interfacial tension and better anti-swelling capability; the demulsification and discharge aiding agent is used for fracturing and acidification treatment of the oil field reservoir and can effectively inhibit clay swelling, tubular billet resistance and resistance caused by emulsion blocking are reduced, the flowback rate of a fracturing fluid is increased, water-blocking damage to the stratum by the fracturing fluid is relieved, the hydrocarbon reservoir is effectively protected, and the fracturing effect of the oil field reservoir is improved.

Description

technical field [0001] The invention relates to the technical field of oil exploitation, in particular to a demulsification and drainage aid, a preparation method thereof and a treatment method for oilfield reservoirs. Background technique [0002] In the process of oilfield development, oilfield reservoirs will be damaged in various ways. Whether it is a high permeability formation or a low permeability formation, as long as foreign fluids are immersed, problems such as oil-water emulsification, water lock, and expansion of oilfield reservoirs will appear. Low-permeability oilfield reservoirs are mostly composed of siltstone and fine sandstone. The reservoirs have poor permeability, and the pore throat radius of oil and gas layers is small. During fracturing and acidizing, it is easy to cause oil-water emulsification, residue blockage and water lock damage, etc. question. [0003] When the external fluid invades the pores of the oil and gas layer, due to the existence of t...

Claims

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Application Information

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IPC IPC(8): C09K8/584E21B43/26
CPCC09K8/584E21B43/26
Inventor 里群
Owner 国勘石油技术有限公司