Finite Element Method Simulation of Wellbore Stability under Different Operating and Geomechanical Conditions  

作　　者：Junyan Liu Ju Liu Yan Wang Shuang Liu Qiao Wang Yihe Du 

机构地区：[1]Oil&Gas Project Research Institute,PetroChina Tarim Oilfield Company,Korla,841000,China [2]Petroleum Engineering School,Southwest Petroleum University,Chengdu,610500,China

出　　处：《Fluid Dynamics & Materials Processing》2024年第1期205-218,共14页流体力学与材料加工（英文）

基　　金：This work is financially sponsored by Tarim Oilfield“Study on Adaptability Evaluation and Parameter Optimization of Completion Technology in Bozi Block,Tarim Oilfield”(Item Number:201021113436).

摘　　要：The variation of the principal stress of formations with the working and geo-mechanical conditions can trigger wellbore instabilities and adversely affect the well completion.A finite element model,based on the theory of poro-elasticity and the Mohr-Coulomb rock damage criterion,is used here to analyze such a risk.The changes in wellbore stability before and after reservoir acidification are simulated for different pressure differences.The results indicate that the risk of wellbore instability grows with an increase in the production-pressure difference regardless of whether acidification is completed or not;the same is true for the instability area.After acidizing,the changes in the main geomechanical parameters(i.e.,elastic modulus,Poisson’s ratio,and rock strength)cause the maximum wellbore instability coefficient to increase.

关 键 词：Wellbore stability finite element acidizing operation well completion 

分 类 号：TE6[石油与天然气工程—油气加工工程]