东北石油大学学报2025，Vol.49Issue(2)：30-45,70,17.DOI:10.3969/j.issn.2095-4107.2025.02.003
断背斜储层物性演化及流固耦合数值模拟
Evolution of petrophysical properties and coupled hydraulic-mechanical modelling for fault-related anticline reservoirs:example from Cretaceous reservoirs in the Kelasu Structural Belt,Kuqa Depression
摘要
Abstract
To better study the effects of structural strain and fluid overpressure on reservoir properties,this research focuses on the thrust-related folds in the Kelasu Structural Belt,Kuqa Depression.The in-tergranular volume distribution characteristics of the reservoir and a fluid-solid coupling numerical meth-od are applied to analyze the formation process and property evolution of the faulted anticline.The study quantitatively evaluated the controlling effects of tectonic compression and fluid flow on the evolution of reservoir physical properties.The results showed that during the formation of a fault-related anticline on Kelasu Structural Belt,Kuqa Depression,the reservoir formation would be under compressive strain.Due to the stretching of the outer-arc of an anticline and associated thrust faulting,the hinge and back-limb of the fault-related anticline would become favorable reservoirs with relatively high porosity.In the late-stage,tectonic compression-induced overpressure would provide little protection on reservoir porosi-ty,with merely 0.25％-0.47％ and 0.18％-0.43％ increases at the hinge and back-limb of the fault-re-lated anticline,respectively.The evolution paths of the compressive strain controlled the porosity evolu-tion of the reservoir.Early-stage strong compressive strain may cause a rapid decrease of porosity,while the late-stage outer-arc tensile can partially offset of the compressive strain.The porosity loss of the res-ervoir during the early-stage compression cannot be fully restored.This study provides a theoretical ba-sis for predicting the distribution of high-quality reservoirs on the fault-related anticline under the com-pressional tectonic condition.关键词
储层物性演化/流固耦合数值模拟/构造/流体/断背斜/有限元/白垩系/克拉苏构造带/库车坳陷Key words
evolution of reservoir petrophysical properties/coupled hydraulic-mechanical modelling/structure/fluid/fault-related anticlines/finite element simulation/Cretaceous/Kelasu Structural Belt/Kuqa Depression分类
能源科技引用本文复制引用
汪顺宇,王健,李勇,王阿瑞,陈美伊,刘可禹..断背斜储层物性演化及流固耦合数值模拟[J].东北石油大学学报,2025,49(2):30-45,70,17.基金项目
国家自然科学基金项目(92055204) （92055204）
国家自然科学基金项目(42172146) （42172146）
中国石油集团公司重大科技项目(ZD2019-183-01-04) （ZD2019-183-01-04）
山东省泰山学者青年专家项目(tsqn202312111) （tsqn202312111）
中国石油大学(华东)深层油气国家重点实验室自主研究课题(SKL-DOG2024-ZYRC-05) （华东）
