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塔里木盆地库车坳陷在上第三系和下第三系都发育巨厚的膏泥（盐）岩，这两套膏泥（盐）层对于该坳陷的油气聚集有着十分重要的影响。与膏泥（盐）岩有关的圈闭发育了３套储盖组合：①白垩系厚砂岩与其上覆下第三系膏盐岩层；②上第三系吉迪克组砂岩与上覆膏泥岩；③盐上康村组─库车组的砂泥岩互层段。库车坳陷构造变形比较强烈，圈闭类型多与断层有关。与膏盐层有关的圈闭主要有两类：①盐层之下挤压型的（断）背斜圈闭，具备储集条件的层位有三叠系、侏罗系、白垩系以及下第三系底砂岩；②盐层之上的引张型（断）背斜圈闭，具备储集条件的层位有康村组和库车组。在盐层上、下存在两种不同的油气运聚模式，即盐上拱张背斜油气藏和盐下挤压背斜气藏，而断层是源于三叠－侏罗系烃源岩的油气进入储集层的重要通道，并且盐下以天然气聚集为主。
The Kuqa Depression in the Tarim Basin develops very thick gypsum (salt) rocks in the Upper Tertiary and Lower Tertiary. These two sets of gypsum (salt) formations have a very important influence on the hydrocarbon accumulation in this depression. There are three sets of reservoir-cap assemblages developed in the trap associated with the gypsum (salt) rock: ① Cretaceous thick sandstone and its overlying Tertiary gypsum salt rock; ② Upper Triassic Jidike Formation sandstone and overlying gypsum mudstone; (3) sandstone and mudstone interbedded with the Kunshang Formation-Kuqa Formation. The Kuqa Depression is characterized by strong structural deformation and more trapping types related to faults. There are mainly two types of traps associated with the gypsum salt layer: ① Extruded (fractured) anticlines trapped beneath the salt layer, with Triassic, Jurassic, Cretaceous, Three series of bottom sandstone; ② Extensional (an) anticline trap above the salt layer, with Kangcun Formation and Kuqa Formation with reservoir conditions. There are two different modes of hydrocarbon migration and accumulation beneath the salt layer, that is, the salt-arc anticlinal reservoir and the sub-salt crustal anticline, and the fault is derived from Triassic-Jurassic source rocks Oil and gas into the reservoir of an important channel, and salt to natural gas-based.