库车前陆盆地克拉苏构造带的构造特征与油气

STRUCTURAL CHARACTERISTICS AND ITS RELATION WITH HYDROCARBON OF KELASU TECTONIC ZONE IN KUQA FORELAND BASIN

克拉苏构造带位于库车前陆盆地的北侧， 由浅部和深部两个层次的构造组成， 上、下不同层次的构造具有不一致性。浅部层次的构造主要为断层传播褶皱、断层传播－ 滑脱褶皱， 这些构造的突破断层发育， 不利于油气的保存； 深部层次的构造主要为被动顶板双重构造、突发构造和断层转折褶皱， 这些构造在走向上相互转变， 构成了本区最有利的构造圈闭。断裂是本区最重要的构造， 它不仅是烃源岩排烃的有效机制， 而且是油气运移的通道。

Kelasu tectonic zone is located in the northern part of Kuqa foreland basin It consists of shallow and deep level structures which are not consistent in characteristics The shallow level structures are characterized mainly by faultpropagation fold, faultpropagation/detachment fold in which breaks through fault are found, it is disadvantageous for hydrocarbon preservation The deep level structures are characterized mainly by passiveroof duplex, pop up and faultband folds which formed the most favorable reservoir Fault is the most important structure, it works not only as the effective expulsion mechanism of hydrocarbon, but also as the migration pathway of hydrocarbon The hydrocarbon migration is influenced by the matched degree of faulting time and oil generating phase, lithology of faulted strata, fault dip etc