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Efficient cleanup additive for continental facies shale and preparation method of efficient cleanup additive

A drainage aid and shale technology, which is applied in the field of oil field fracturing fluid, can solve the problems that are difficult to meet the development problems of continental shale, and achieve the effects of reducing capillary resistance, reducing surface and interfacial tension, and increasing contact angle

Active Publication Date: 2020-08-25
CNPC BOHAI DRILLING ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a high-efficiency drainage aid for continental shale that solves the problem that conventional drainage aids are difficult to meet the development of continental shale and its preparation method

Method used

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  • Efficient cleanup additive for continental facies shale and preparation method of efficient cleanup additive
  • Efficient cleanup additive for continental facies shale and preparation method of efficient cleanup additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The feed mass ratio is fluorocarbon surfactant, hydrocarbon surfactant and fluorosilane surfactant feed mass ratio=2:5:8.

[0015] Among them, the fluorocarbon surfactant adopts perfluorohexyl polyvinyl ether sulfonate; the fluorosilicon surfactant adopts N-dimethylaminopropyl-N-triethoxysilane; the hydrocarbon surfactant adopts eighteen Alkyl dihexyl betaine.

[0016] Add a certain amount of hydrocarbon surfactants, fluorocarbon surfactants and fluorosilane surfactants in proportion, and stir evenly to obtain a drainage aid.

Embodiment 2

[0018] The feed mass ratio is fluorocarbon surfactant, hydrocarbon surfactant and fluorosilane surfactant feed mass ratio=2:6:9.

[0019] Among them, the fluorocarbon surfactant adopts perfluorohexyl polyvinyl ether sulfonate; the fluorosilicon surfactant adopts N-dimethylaminopropyl-N-triethoxysilane; the hydrocarbon surfactant adopts eighteen Alkyl dihexyl betaine.

[0020] Add a certain amount of hydrocarbon surfactants, fluorocarbon surfactants and fluorosilane surfactants in proportion, and stir evenly to obtain a drainage aid.

Embodiment 3

[0022] The feed mass ratio is fluorocarbon surfactant, hydrocarbon surfactant and fluorosilane surfactant feed mass ratio=3:7:8.

[0023] Among them, the fluorocarbon surfactant adopts perfluorohexyl polyvinyl ether sulfonate; the fluorosilicon surfactant adopts N-dimethylaminopropyl-N-triethoxysilane; the hydrocarbon surfactant adopts eighteen Alkyl dihexyl betaine.

[0024] Add a certain amount of hydrocarbon surfactants, fluorocarbon surfactants and fluorosilane surfactants in proportion, and stir evenly to obtain a drainage aid.

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Abstract

The invention relates to an efficient cleanup additive for continental facies shale. The efficient cleanup additive comprises a fluorocarbon surfactant, a hydrocarbon surfactant and a fluorosilicone surfactant; the mass ratio of the fluorocarbon surfactant to the hydrocarbon surfactant to the fluorosilicone surfactant is (2-3): (5-7): (8-10); perfluorohexyl polyvinyl ether sulfonate is adopted asthe fluorocarbon surfactant; N-dimethylaminopropyl-N-triethoxysilane is adopted as the fluorosilicone surfactant; and octadecyl dihexyl betaine is adopted as the hydrocarbon surfactant. The efficientcleanup additive for the continental facies shale can effectively increase a contact angle and reduce capillary resistance while reducing surface and interface tension, has an amphiphobic effect, andcan be used for continental facies rock reservoirs with the characteristics of high water saturation, poor self-absorption capacity, high adsorbed gas content and the like.

Description

technical field [0001] The invention belongs to the technical field of oilfield fracturing fluids, and in particular relates to a high-efficiency drainage aid for continental shale and a preparation method thereof. Background technique [0002] During the exploration and development of domestic continental shale, due to the characteristics of high water saturation and poor self-absorption capacity of the reservoir, it is difficult for conventional drainage aids to effectively reduce the gel-breaking fluid surface, interfacial tension and capillary pressure of continental shale fracturing. Resistance, it is difficult to meet the demand for faster and more thorough flowback of the gel breaking fluid. [0003] Therefore, based on these problems, it is of great practical significance to provide a high-efficiency drainage aid for continental shale and a preparation method thereof that solve the problem that conventional drainage aids are difficult to meet the development of conti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/74C09K8/88C09K8/86
CPCC09K8/74C09K8/882C09K8/86
Inventor 李伟王红科牛增前靳剑霞张雅静赵鹏王越常青郝鹏涛徐昊垠董丙响
Owner CNPC BOHAI DRILLING ENG
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