套管-水泥-地层系统水泥层应力分析  

Stress analysis of cement layer in casing-cement-stratum system

作　　者：曹利民 王成文[2] 刘宝山[3] 刘建林[3] 马驰骋[1,3] CAO Limin;WANG Chengwen;LIU Baoshan;LIU Jianlin;MA Chicheng(School of Transportation and Vehicle Engineering,Shandong University of Technology,Zibo 255049,China;School of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,China;School of Storage,Transportation and Architectural Engineering,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]山东理工大学交通与车辆工程学院,山东淄博255049 [2]中国石油大学(华东)石油工程学院,山东青岛266580 [3]中国石油大学(华东)储运与建筑工程学院,山东青岛266580

出　　处：《山东理工大学学报（自然科学版）》2022年第1期1-7,共7页Journal of Shandong University of Technology:Natural Science Edition

基　　金：山东省重点研发计划项目(国际科技合作)(2019GHZ001);山东省自然科学基金项目(ZR2020MA057)。

摘　　要：为分析套管-水泥-地层油气井系统压裂过程中水泥层的受力状态,根据系统中各结构层接触面上的位移连续条件以及弹性力学理论基础,得到了水泥层两界面的应力状态表达式;在有限元仿真软件中建立了井筒组合体力学模型,分析模型组合体在不同系统内压、水泥层材料参数以及施工误差等因素影响下水泥层的受力状态。结果表明内外载荷、水泥层材料参数以及偏心等因素都会对水泥层的受力产生一定影响。In order to analyze the stress state of the cement layer during the fracturing process of the casing-cement-formation oil and gas well system,the stress state expression of the two interfaces of the cement layer is obtained according to the displacement continuity condition on the contact surface of each structural layer in the system and the theoretical basis of elastic mechanics.A mechanical model of the wellbore assembly was established in the finite element simulation software to analyze the stress state of the cement layer under different factors such as internal pressure of the model assembly,cement layer material parameters and construction errors.The analysis results show that factors such as internal and external loads,cement material parameters,and eccentricity have a certain impact on the stress of the cement layer.

关 键 词：压裂 有限元 应力分析 油气井 弹性模量 

分 类 号：TE256[石油与天然气工程—油气井工程]