Mechanical behavior of salt rocks: A geomechanical model

作     者：Saeed Shad Negar Razaghi Davood Zivar Soheil Mellat 

作者机构：Department of Chemical and Petroleum EngineeringSharif University of TechnologyTehranIran PanTerra Geoconsultants BVLeiderdorpNetherlands 

出 版 物：《Petroleum》 (油气（英文）)

年 卷 期：2023年第9卷第4期

页      面：508-525页

核心收录：

学科分类：0820[工学-石油与天然气工程] 082001[工学-油气井工程] 08[工学] 

主　　题：Salt rock Underground gas storage Geomechanics Dynamic and static mechanical properties Transition zone Damage factor 

摘      要：The geomechanical behavior of salt rocks is a significant concern during drilling and development operations in some hydrocarbon reservoirs and underground gas storage *** this study,the static and dynamic salt rock geomechanical properties from a field in southwest Iran were evaluated using experiments such as waves velocities,and thermo-mechanical coupled uniaxial and triaxial compression *** a result and by considering both the petrophysical well logs and laboratory data of the waves’velocities,it is observed that the elastic properties of the core samples are concentrated within a narrow range unless an abnormality causes *** results of uniaxial compression tests showed that rock strength decreases with increasing temperature *** addition,the reduction of rock strength was observed with increasing porosity of the core samples as *** the case of triaxial compression tests,applying confining pressure on the core sample caused an increment in rock strength,while temperature decreased rock *** temperature also increased cohesion and decreases friction *** ratio of changes in stress to strain was used to investigate the dynamic changes in the geomechanical *** maximum 0.25 damage factor was observed for the core samples for different definitions of the damage ***,we propose a novel analytical model to predict the stress-strain behavior of salt rocks at different *** model was validated using experimental results and indicated a satisfactory accuracy.