Numerical Analysis of Residual Strength in the Perforated Casing of Ultra Deep Wells

作     者：Yanxian Wu Shouming Zhong Zhigang Guan Lin Song Kun Li Jiarui Sun Yuqiang Xu Maochuan Tu Chaobin Fan Jinbin Yang 

作者机构：Engineering Technology Research Institute of Petro China Xinjiang Oilfield CompanyKaramay834000China School of Petroleum EngineeringChina University of Petroleum(East China)Qingdao266580China SINOPEC Xinan Oilfield Service CorporationDeyang618000China SINOPEC Southwest China Oil&Gas CompanyChengdu610041China 

出 版 物：《Fluid Dynamics & Materials Processing》 (流体力学与材料加工（英文）)

年 卷 期：2023年第19卷第1期

页      面：261-271页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China. 

主　　题：Perforated casing non-uniform stress residual strength orthogonal experiment 

摘      要：A three-dimensional model for the numerical simulation of casing-cement behavior is used to investigate residual strength in the perforated casing of ultra deep wells.The influence of the hole diameter,hole density and phase angle on the residual strength of the casing under non-uniform stress and fracturing conditions is revealed through the consideration of different perforation parameters.It is shown that the residual strength of the casing increases with the hole diameter and periodically changes with the hole density;the phase angle is the main factor that affects the residual strength of the perforated casing,and the perforation should be avoided in the direction of the minimum principal stress to reduce stress concentration at the perforation hole.Moreover,as shown by a companion orthogonal experiment,the descending order of influence of the different influential parameters is:phase angle,hole diameter,hole density and the thickness of casing.