Casing Damage Mechanism Caused By Seepage and its Numerical Simulation
With adoption of high pressure water injection, the casing damage will become more and more serious with the developing time. From the process of oilfield production, it can be concluded that casing damage is closely related to seepage field changes. From the types of mechanical deformation, casing damage can be categorized into three groups: extrusion failure, tensile failure and shear failure, which are all induced by seepage. Based on fluid-stress coupling theory, the mechanism of three types of casing damage is analyzed, and also the corresponding conceptual models are built separately. Finally a case study is given. The results show that seepage has great influence on casing damage, and it is necessary to consider the seepage field especially when numerical simulation with the high pressure water injection is done. It was clarified that with the different conceptual models all kinds of water injection pressure threshold limit values can be calculated, which can provide good governing theories and advices for controlling reasonable injection and production pressure and preventing casing damage.
casing damage seepage fluid-solid coupling mechanism numerical simulation
HUANG Xiao-Ian XIONG Jun WANG Xiqiang
Institute of Porous Media Mechanics, Wuhan Polytechnic University, Wuhan 430023 China Department of Urban and Environmental Engineering, Kyoto University, Kyoto 615-540, Japan Oil Production Plant NO.7, Changqing Oilfield Company, Wuqi 717606 China
国际会议
2009 International Forum on Porous Flow and Applications(第十届全国渗流力学学术会议)
武汉
英文
673-677
2009-04-26（万方平台首次上网日期，不代表论文的发表时间）