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Development of a High-Temperature Thixotropic cement slurry system

Fluid Dynamics & Materials Processing 2023年第11期19卷 2907-2921页

作者： Ping Lv Jiufei Liu Mengran Xu Hui Tian Huajie Liu Yuhuan Bu Zhuang Cai Junfeng Qu Institute of Petroleum Engineering Technology Sinopec Northwest Oil Field CompanyUrumqi830000China Xinjiang Branch of CNPC Chuanqing Drilling Engineering Company Limited Korla841000China School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580China Sinopec Shengli Petroleum Engineering Co. Ltd.DongyingChina Henan Science and Technology Innovation Promotion Center Zhenzhou450003China

cementing carbonate reservoirs is generally a difficult *** so-called thixotropic cement slurry has gained considerable attention in this regard as it can help tofix some notable *** precisely,it can easilyfill the leakage layer;moreover,its gelling strength can grow rapidly when pumping stops,thereby increasing the resistance to gas channeling,effectively preventing this undesired phenomenon in many ***-temperature thixotropic cement slurry systems,however,are still in an early stage of development and additional research is needed to make them a viable *** the present study,using a self-developed composite high-temperature thixotropic additive as a basis,it is shown that the compressive strength can be adjusted by tuning the proportion of silica sand,the high-temperature retarder,fluid loss additive and dispersant(compatible with the thixotropic additive).According to the tests,the developed high-temperature thixotropic cement slurry system has a 14 d compressive strength of 29.73 MPa at 150°C,and a thickening time of 330 min when the dosage of retarder is 2%.At the same time,the rheological property,water loss,permeability,water separation rate,and settlement stability of the cement slurry system meet the requirements of cementing construction.

关键词： High temperature resistance thixotropy cement slurry system

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