现代地质2026，Vol.40Issue(2)：356-372,17.DOI:10.19657/j.geoscience.1000-8527.202508150006
塔里木盆地克深气田构造裂缝主控因素及发育模式
Main Controlling Factors and Development Model of Tectonic Fractures in Keshen Gas Field,Tarim Basin
摘要
Abstract
The Keshen Gas Field,a typical representative of ultra-deep tight sandstone reservoirs in the Kuqa Depression,exhibits a fracture system whose development characteristics and distribution patterns exert a critical control on efficient natural gas development.Based on core and imaging log data,this study systematically characterizes the genetic types,orientation,filling properties,and aperture of structural frac-tures within the Keshen Gas Field.It analyzes the patterns of structural fracture development,identifies the main controlling factors,and establishes a developmental model applicable to ultra-deep tight sandstones.The results demonstrate significantly different controlling mechanisms for fracture development across various blocks:fractures in the northern block are primarily controlled by weakened tectonic stress intensity and the modification by early fracture fillings,resulting in a relatively lower fracture density.The central block,located in the anticlinal core and a stress superposition zone,possesses favorable conditions for fracture ini-tiation and propagation,including high rock brittleness and thin mechanical layers,making it the most intensely fractured area.In the southern block,efficient stress transmission due to thinner salt-gypsum lay-ers,combined with strike-slip activity and anhydrite cementation support,gives rise to fractures character-ized by large apertures and low filling degrees.The established fracture development model reveals a"tectonic-sedimentary"binary coupling control mechanism,enriches the understanding of fracture forma-tion mechanisms in ultra-deep tight sandstones,and provides theoretical support for optimized well place-ment,hydraulic fracturing design in the Keshen gas field,as well as for the exploration and development of fractured reservoirs in similar structural settings.关键词
库车坳陷/克深气田/超深层/构造裂缝/差异分布/主控因素/发育模式Key words
Kuqa depression/Keshen gas field/ultra-deep reservior/tectonic fracture/differential distribu-tion/main controlling factor/development pattern分类
天文与地球科学引用本文复制引用
宋雯丹,徐朝晖,徐怀民,彭强强..塔里木盆地克深气田构造裂缝主控因素及发育模式[J].现代地质,2026,40(2):356-372,17.基金项目
国家自然科学基金企业创新发展联合基金重点支持项目(U24B2015). （U24B2015）
