Development of a High-Temperature Thixotropic Cement Slurry System  

作　　者：Ping Lv Jiufei Liu Mengran Xu Hui Tian Huajie Liu Yuhuan Bu Zhuang Cai Junfeng Qu 

机构地区：[1]Institute of Petroleum Engineering Technology,Sinopec Northwest Oil Field Company,Urumqi,830000,China [2]Xinjiang Branch of CNPC Chuanqing Drilling Engineering Company Limited,Korla,841000,China [3]School of Petroleum Engineering,China University of Petroleum(East China),Qingdao,266580,China [4]Sinopec Shengli Petroleum Engineering Co.,Ltd.,Dongying,China [5]Henan Science and Technology Innovation Promotion Center,Zhenzhou,450003,China

出　　处：《Fluid Dynamics & Materials Processing》2023年第11期2907-2921,共15页流体力学与材料加工（英文）

基　　金：funded by the National Natural Science Foundation of China(51974355).

摘　　要：Cementing carbonate reservoirs is generally a difficult task.The so-called thixotropic cement slurry has gained considerable attention in this regard as it can help tofix some notable problems.More 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 cases.High-temperature thixotropic cement slurry systems,however,are still in an early stage of development and additional research is needed to make them a viable option.In 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 

分 类 号：TB3[一般工业技术—材料科学与工程]