Evolution and Application of Sealing Ability of Gypsum Caprocks under Temperature-Pressure Coupling:An Example of the ZS5 Well in the Tazhong Area of the Tarim Basin

作     者：LIU Hua ZHAO Shan YANG Xianzhang ZHU Yongfeng WANG Shen ZHANG Ke LIU Hua;ZHAO Shan;YANG Xianzhang;ZHU Yongfeng;WANG Shen;ZHANG Ke

作者机构：National Key Laboratory of Deep Oil and GasChina University of Petroleum(East China)QingdaoShandong 266580China School of GeosciencesChina University of Petroleum(East China)QingdaoShandong 266580China Laboratory for Marine Mineral ResourcesNational Laboratory for Marine Science and TechnologyQingdaoShandong 266071China PetroChina Tarim Oil Field CompanyKorlaXinjiang 841001China 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报（英文版）)

年 卷 期：2024年第98卷第1期

页      面：168-184页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 

基　　金：funded by the National Natural Science Foundation of China(Grant No.42172147) PetroChina Major Science and Technology Project(Grant No.ZD2019-183-002) 

主　　题：temperature-pressure coupling gypsum caprocks brittle-plastic evolution sealing capacity Tarim Basin 

摘      要：Gypsum caprocks sealing ability is affected by temperature-pressure *** to the limitations of experimental conditions,there is still a lack of triaxial stress-strain experiments that simultaneously consider changes in temperature and pressure conditions,which limits the accuracy of the comprehensive evaluation of the brittle plastic evolution and sealing ability of gypsum rocks using temperature pressure *** stress-strain tests were utilized to investigate the differences in the evolution of the confinement capacity of gypsum rocks under coupled temperaturepressure action and isothermal-variable pressure action on the basis of sample feasibility *** to research,the gypsum rock s peak and residual strengths decrease under simultaneous increases in temperature and pressure over isothermal pressurization experimental conditions,and it becomes more *** reduces the amount of time it takes for the rock to transition from brittle to *** temperature is taken into account,both the brittle–plastic transformation s depth limit and the lithological transformation of gypsum rocks become shallower,and the evolution of gypsum rocks under variable temperature and pressure conditions is more complicated than that under isothermal *** sealing ability under the temperature-pressure coupling is more in line with the actual geological context when the application results of the Well#ZS5 are *** provides a theoretical basis for precisely determining the process of hydrocarbon accumulation and explains why the early hydrocarbon were not well preserved.