塔里木盆地西南边缘压扭构造体系及其石油地质意义

塔里木盆地西南边缘发育甫沙-齐姆根和柯克亚-和田南2个压扭构造体系，前者主要是帕米尔弧形构造东北侧的侧向滑移与西昆仑造山带向塔里木盆地的不均匀冲断活动的联合作用结果，后者则主要与西昆仑造山带向塔里木盆地的不均匀冲断作用有关。这两个压扭构造体系主体形成于新近纪以来的喜马拉雅运动，其构造样式在平面上主要为走滑-逆冲断裂和雁列式分布的断裂与背斜，在剖面上则呈现为双重构造与反冲构造的叠加。压扭构造带所遭受的压扭作用从改善储层的储集性能、形成新的油气圈闭、促进油气运移与成藏等方面对塔里木盆地西南边缘的油气成藏发挥了积极作用，压扭构造带是油气勘探的有利构造部位。

Transpressional structural systems and their petroleum geological significance in southwestern margin of Tarim Basin

The Fusha-Qimugen and the Kekeya-Hetiannan transpressional structural systems are developed in the southwestern margin of the Tarim Basin. The former system has resulted from the combined effects of the lateral strike-slipping in the northeastern side of the Pamir Terrain and the asymmetrical thrusting of the West Kunlun Orogen toward the Tarim Basin,while the latter was mainly related with the asymmetrical thrusting of the West Kunlun Orogen toward the Tarim Basin. These two transpressional structural systems were chiefly formed during the Neogene Himalayan movement. Their structural styles are characterized by the strike-slip thrusts and an echeloned faults and folds in a planar view,and by the superposition of the duplex and the back-thrust structures in a cross-section view. Transpression has contributed to the improvement of reservoir petrophysics,new traps formation,oil and gas migration,and petroleum accumulation. Therefore the transpressional zones are the favorable structures for petroleum exploration.