Abstract:

Tarim basin,located in NW China,is a giant hydrocarbon bearing basin.It underwent the Caledonin,Hercynian,Indo China,Yanshan and Himalaya tectonic movements.Faults are most obvious structural features for all structural deformation styles compresso wrench faults,mainly distributed on uplift zones in the basin,is one of the most widely developed structural styles.A total of 9 compresso wrench fault belts have been identified.They can form three kinds of association geometry(broom,"入" and en echelon geometry)on the plane.The faults have four kinematic characters:multi stage development,successive development,differential movement and transform movement.The fault belts formed abundant structural styles,helped hydrocarbon migration,improved reservoir petrophysical characters and controlled hydrocarbon distribution,they are very favorable for hydrocarbon accumulation and form major hydrocarbon pool types in the basin.Based on hydrocarbon exploration in the basin,more than 90% hydrocarbon pools are related to faults,mainly compresso wrench faults,and backthrust is the most favorable hydrocarbon accumulation among them.

Key words: Tarim basin, compresso-wrench fault, flower structure, backthrust, hydrocarbon accumulation

摘要：

塔里木盆地是一个经历了加里东、海西、印支、燕山和喜山多期构造变动而发育起来的大型复合叠合盆地,断裂构造是最醒目的构造形迹,其中压扭断裂是盆内较为发育的一种构造样式.压扭断裂主要分布在隆起带之上,在平面上呈扫帚状、入字型和雁行式几何形态;在剖面上呈花状构造或逆冲构造样式.断裂具有多期性、继承性、差异性和转化性的运动学特征.断裂带可以形成丰富的构造样式、促进油气垂向运移、改善储层物性和控制油气分布,是有利的油气聚集带.根据勘探成果,90%以上的油气藏与断裂且主要是压扭断裂有关,并且背冲构造样式是最有利的油气聚集形式.

关键词: 塔里木盆地, 压扭断裂, 花状构造, 背冲构造, 油气聚集