钻井液与完井液2026，Vol.43Issue(2)：152-160,9.DOI:10.12358/j.issn.1001-5620.2026.02.002
高应力破碎性地层井壁稳定预测模型
A Model for Predicting Borehole Wall Stability in High Stress Fractured Formations
摘要
Abstract
To deal with the wellbore collapse and instability problems encountered in drilling the broken marine carbonate formations in Shunbei and western Sichuan,a visual true triaxial wellbore instability physical simulation experimental platform was prepared and used to study the microstructural characteristics,physiochemical characteristics and mechanical properties of the broken formations,and it was understood that concentrated geostress,formation fragmentation and the mechanical-chemical coupling effect between the drilling fluid and the rocks are the main controlling factors for wellbore instability.By introducing a formation integrity coefficient,a parameter relationship between the"formation integrity coefficient+drilling fluid soaking"and formation mechanics was established.Based on finite element simulation,the distribution of the geostress of the broken formations was revealed.Based on equivalent rock mechanics parameters and taking into account the chemical interaction between drilling fluid and rock,a collapse pressure prediction model based on M-C criterion was constructed.The prediction accuracy of collapse pressure in typical wells,such as the well SHB9X,PZ5-3D and PZ6-5D,is as high as 86.0%-93.9%.关键词
破碎性地层/井壁失稳/高应力/碳酸盐岩/预测模型Key words
Broken formation/Wellbore instability/High stress/Carbonate rock/Prediction model分类
能源科技引用本文复制引用
王伟吉,张杜杰..高应力破碎性地层井壁稳定预测模型[J].钻井液与完井液,2026,43(2):152-160,9.基金项目
国家自然科学基金企业创新发展联合基金集成项目"三大盆地深层—超深层海相油气高效勘探开发基础研究"(U24B6001). （U24B6001）
