芥酸酰胺丙基叔胺和苯甲酸压裂液体系构筑

doi:10.3969/j.issn.1001-1803.2019.09.001

Abstract

Abstract:

The N-erucamido-N, N-dimethylamine（EA） and benzoic acid（BA） were used to construct the EABA system. The effects of pH value and EABA concentration on its rheological behavior were studied by rheometer. The morphology of micro-aggregates was observed by Cryo-TEM. The system was used to prepare a clean fracturing fluid and its performance was evaluated. Results show that the optimum viscoelastic pH of the EABA system is 6.17. At this time, the structure of “pseudo” gemini surfactant is formed in the system with the formation of worm-like micelles. The viscoelasticity increases with the increase of concentration and the increase becomes slower after reaching 50 mmol/L. After shearing at 90 ℃ and 170 s ^-1 for 2 h, the viscosity of 50 mmol/L EABA clean fracturing fluid is stable at 35 mPa·s, and the shear recovery and proppant-carrying performance are good. The breaking fluid viscosity is 2.1 mPa·s within 10 min, which meets the requirements of clean fracturing fluid.

Key words: cationic surfactant, “pseudo” gemini surfactant;, clean fracturing fluid, fracturing fluid properties

CLC Number:

TQ423

KANG Wan-li,LI Xin-xin,ZHAO Yi-lu,WANG Peng-xiang,HOU Xiao-yu,YANG Hong-bin. Construction of N-erucamido-N, N-dimethylamine and benzoic acid fracturing fluid system[J].China Surfactant Detergent & Cosmetics, 2019, 49(9): 555-560.

Figures/Tables 10

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	t/min
	2	5	8	10
η/（mPa·s）	30.5	17.4	6.8	2.1

Construction of N-erucamido-N, N-dimethylamine and benzoic acid fracturing fluid system

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