西安石油大学学报（自然科学版）2024，Vol.39Issue(3)：42-49,8.DOI:10.3969/j.issn.1673-064X.2024.03.005
盐岩蠕变特征对井筒形变量的影响规律
Influence of Creep Characteristics of Salt Rock on Wellbore Deformation
摘要
Abstract
Aiming at casing damage in salt rock,the creep characteristics of the salt rock were studied by means of triaxial rock me-chanics experiments.An unsteady salt rock creep model which can describe the attenuation creep stage and steady-state creep stage of the salt rock is established based on the the experiment results.The radial displacement of wellbore in the creep process of deep salt rock is calculated based on the model.The calculation results show that the internal pressure of the wellbore can effectively reduce the creep displacement of the inner wall of the salt rock wellbore,while the horizontal principal stress and overlying pressure of the forma-tion can increase the deviation stress of the formation,thereby increasing the creep displacement of the salt rock wellbore wall.In order to avoid casing deformation,the elastic modulus of cement is effectively reduced by adding hollow ceramic particles to the cement,there-by reducing the extrusion effect on the casing,reducing the risk of casing deformation,and forming a new type of casing deformation pre-vention technology for oil and gas wells.关键词
盐岩蠕变/套管变形/地层滑移/水泥环/径向位移Key words
salt rock creep/casing deformation/formation slip/cement sheath/radial displacement分类
能源科技引用本文复制引用
闫炎,蔡萌,马文海,张晓川,韩礼红,刘永红..盐岩蠕变特征对井筒形变量的影响规律[J].西安石油大学学报（自然科学版）,2024,39(3):42-49,8.基金项目
中国石油天然气集团有限公司科学研究与技术开发项目"油气井套损评价与修复关键技术研究"(2021DJ2705) （2021DJ2705）
"井筒完整性关键理论与控制技术"(2021DJ4403) （2021DJ4403）
