石油实验地质2025，Vol.47Issue(6)：1255-1267,13.DOI:10.11781/sysydz2025061255
塔里木盆地库车坳陷克拉苏构造带差异构造样式及其对地应力分布的影响
Differential structural styles and their influence on in-situ stress distribution in Kelasu tectonic belt,Kuqa Depression,Tarim Basin
摘要
Abstract
With the continuous growth of global energy demand,deep and ultra-deep oil and gas exploration and development have become key areas in the oil and gas industry.The Kuqa Depression in the Tarim Basin,China,is rich in deep and ultra-deep oil and gas resources,but it is affected by intense tectonic compression,leading to complex structural styles and significant variations in in-situ stress distribution,posing major challenges to oil and gas exploration and development.This study aims to clarify the structural deformation patterns and their main con-trolling factors in the Kelasu tectonic belt,reveal how structure and stress coupling influences hydrocarbon accumula-tion,optimize strategies for deep and ultra-deep exploration,and improve development efficiency.Taking the Kelasu tectonic belt in the Kuqa Depression,Tarim Basin as the research object,this study explored the charac-teristics of structural styles,influencing factors,and in-situ stress response characteristics in different segments through structural profile analysis and numerical simulation.The results showed that there were significant differences in structural styles and in-situ stress distribution among different segments of the Kelasu tectonic belt.The western Awate segment developed a"double-layer"thrust-nappe structure under intense compression,exhibiting strong compressional characteristics with high stress values at both ends of the high-angle faults.The eastern Keshen segment was dominated by pop-up and imbricate thrust structures,exhibiting a stress concentration pattern indica-tive of significant fault slip,with stress concentrated at the tops of faults and the bases of pop-up structures.The Bozi-Dabei segment was characterized by broad and gentle synclines in suprasalt structures,with well-developed salt welds and widely distributed subsalt pop-up structures,accompanied by localized stress concentration.Based on dynamic numerical simulations,a quantitative analysis was conducted on influencing factors,including fault fric-tion coefficient,shortening amount,and fault dip angle.It is concluded that shortening amount and fault dip angle are the main controlling factors causing differences in structural styles and current in-situ stress distribution.关键词
构造样式/地应力/克拉苏构造带/库车坳陷/塔里木盆地Key words
structural style/in-situ stress/Kelasu tectonic belt/Kuqa Depression/Tarim Basin分类
能源科技引用本文复制引用
袁航,鞠玮,张辉,徐珂,宁卫科..塔里木盆地库车坳陷克拉苏构造带差异构造样式及其对地应力分布的影响[J].石油实验地质,2025,47(6):1255-1267,13.基金项目
地球深部探测与矿产资源勘查国家科技重大专项(2024ZD1004200)、国家自然科学基金面上项目(42372185)和江苏高校"青蓝工程"联合资助. （2024ZD1004200）
