石油实验地质2024，Vol.46Issue(4)：664-673,10.DOI:10.11781/sysydz202404664
沉积微相对超深储层岩石力学性质的影响及其应用
Influence of sedimentary microfacies on the rock mechanics of ultra-deep reservoirs and its application:
摘要
Abstract
To optimize the identification of sweet spots with natural fracture development in ultra-deep tight sandstone reservoirs of Cretaceous in the Kuqa Depression,Tarim Basin,this study systematically analyzed the differences in rock mechanical properties across various sedimentary microfacies in the BZ gas field.Utilizing data from outcrops,rock slices,imaging logging,and other sources,a method for optimizing the rock mechanics parameter model of reservoirs was proposed,which enhanced the prediction accuracy of natural fractures within 200 m around the wellbore.Key findings of the research include:(1)In the third member of the Cretaceous Bashijiqike Formation in the BZ gas field,different sedimentary microfacies and the same microfacies at different positions had differences in rock composition and rock assemblages(including debris content,matrix content,grain size sorting,sand-to-mud ratio,and sand-mudstone combinations).These variations affected the reservoir's Poisson's ratio and Young's modulus,and different microfacies had different rock mechanical parameters.(2)The extent of fracture development differed across various sedimentary microfacies of sand bodies.Fractures were most developed in the underwater distributary channel sandstones at the fan delta front,making them more prone to fracturing compared to the interdistributary bay microfacies and distributary channel microfacies on the delta plain.(3)By further establishing three-dimensional models of different microfacies based on geometric parameters derived from outcrops,it would be feasible to optimize sedimentary microfacies models and rock mechanical parameter models around the wellbore,thereby facilitating more accurate fracture prediction.关键词
裂缝预测/储层地质力学/沉积微相/致密砂岩/超深储层/塔里木盆地Key words
fracture prediction/reservoir geomechanics/sedimentary microfacies/tight sandstone/ultra-deep reservoir/Tarim Basin分类
能源科技引用本文复制引用
王志民,孙海涛,张辉,王晨光,尹国庆,徐珂,钟大康..沉积微相对超深储层岩石力学性质的影响及其应用[J].石油实验地质,2024,46(4):664-673,10.基金项目
中国石油天然气股份有限公司科技专项(2023ZZ14YJ03)资助. （2023ZZ14YJ03）
