摘要
对比分析了库车坳陷与川西坳陷的构造演化、变形区、变形层、滑脱层系,认为两者在构造变形方面存在明显差异。库车坳陷的应力特征以压性为主,横向上变形特征差异较小,纵向上由北向南变形强度逐渐减弱;川西坳陷的应力特征,在晚三叠世须四段-晚侏罗世蓬莱镇组时,表现为很强的扭动特征,构造变形在平面上变化较大,不同区块主变形期及变形特点差异明显,造成深坳陷及斜坡带断裂构造不发育,油气垂向输导作用较差。
With numerous observations on structure evolution, deformation domain and its sequence, slipsheet structure, the authors consider there are obvious difference of structural deformation between the Kuche depression in Tarim Basin and West Sichuan depression in Sichuan Basin. The compressional stress is dominated in the Kuche depression with little change of deformation characteristics in horizontal but a decreasing deformation from north to south. The stress state of West Sichuan depression in the period of Late Triassic to Late Jurassic shows a strong wrench movement, the stage of main deformation and its characteristics are varied in different areas. As a result, faultstructural traps are poorly developed in the deep part and slope, and the fault can not be acted as a vertical passway of hydrocarbon migration.
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2003年第5期511-517,共7页
Journal of Chengdu University of Technology: Science & Technology Edition
关键词
构造变形
沉积展布
区带差异
压扭性
库车坳陷
川西坳陷
structural deformation
sedimentary areal extension
area difference
compresso-shear structure
Kuche depression
West Sichuan depression
