石油钻采工艺2025，Vol.47Issue(4)：397-406,10.DOI:10.13639/j.odpt.202505025
河套盆地巴彦强构造挤压地层各向异性地应力计算方法
Calculation method for anisotropic in-situ stress in intensive tectonically compressed strata in Bayan,Hetao Basin
摘要
Abstract
Due to the influence of intensive tectonic compression on folded belts in Bayn,Hetao Basin,the rock mechanics properties vary across different directions,resulting in frequent downhole complications during drilling.In order to improve the accuracy of rock mechanics parameters calculation and reveal the stress distribution patterns in deep strata,based on the assumption of anisotropy,through analogy and simplification of the relationship between rock ultrasonic test experiment and formation acoustic logging,combined with the differential response of sandstone and mudstone to tectonic compression,a micro-element model for sandy-muddy strata was developed to evaluate the formation anisotropy characteristics.At the same time,the stress-strain constitutive equation was adopted to calculate the anisotropic rock mechanics parameters,and the Thiercelin model was introduced to draw the anisotropic in-situ stress profiles.The model prediction results were validated by triaxial compression tests and acoustic emission Kaiser experiments.The results show that after entering the intensive tectonically compressed stratum,the horizontal maximum principal stress exceeds the overburden pressure and becomes the dominant factor controlling rock mechanics properties,and the lateral rock mechanics properties are enhanced.Maintaining the direction of dynamic and static rock mechanics parameters consistent,the established anisotropic mechanics parameters conversion model is more suitable for intensive tectonically compressed strata.Compared with the traditional isotropic in-situ stress calculation models,the anisotropic model based on acoustic time difference logging can more accurately reflect the variation law of in-situ stress with depth,and the prediction accuracy is improved by 8.22%.The established anisotropic in-situ stress calculation method provides a reliable theoretical basis and engineering guidance for safe and efficient drilling in intensive tectoniccally compressed formations.关键词
河套盆地/强构造挤压/井壁稳定/岩石力学参数/声波测井/Thiercelin模型Key words
Hetao Basin/intensive tectonic compression/wellbore stability/rock mechanics parameters/acoustic logging/Thiercelin model分类
能源科技引用本文复制引用
汝大军,段永强,叶永盛,侯冰,张红彬,王博文,廖志豪,马梓超,刘玉含..河套盆地巴彦强构造挤压地层各向异性地应力计算方法[J].石油钻采工艺,2025,47(4):397-406,10.基金项目
国家科技重大专项"地质工程一体化压裂优化设计软件研发"(编号:2024ZD1404701) （编号:2024ZD1404701）
中国石油天然气股份有限公司重大科技专项"超深层碎屑岩油气规模增储上产与勘探开发技术研究"(编号:2023ZZ14) （编号:2023ZZ14）
中石油华北油田公司重大科技专项"河套盆地及邻区复杂新区安全钻完井关键技术研究"(编号:2024-HB-A0106) （编号:2024-HB-A0106）
中石油华北油田公司重点科技项目"深层复杂井钻完井工程关键技术研究与应用"(编号:2023-HB-D01). （编号:2023-HB-D01）
