摘要
四棵树凹陷是自侏罗纪始沉降接受沉积,晚第三纪沉降最为剧烈的沉积凹陷。凹陷内发育侏罗纪煤系和下第三系安集海河组两套烃源岩层,其中侏罗系煤系分布面积大、厚度大、有机质丰度及热演化程度高,是区内主要油气源岩。托斯台地区和独山子背斜是油气运移的有利指向区。托斯台多种类型的圈闭和独山子背斜深层圈闭是有利的油气聚集场所。
The Sikeshu Depression initiated its subsidence from the Jurassic and the most severe subsidence occurred in Neogene. Two suites of source beds, i. e the Jurassic coal series and the sequences of the Anji and the Hehai formations of Eogene are developed, of which the Jurassic coal series is widely spreaded with a great thickness and richness of organic matter, and high levels of thermal evolution, being considered as a major contributor to hydrocarbons in the area. However, migration is oriented to the Tuositai Region and the Dushanzi Anticline. The various types of traps occurred in the former and the deep-seated traps in the lattter are favourable places for hydrocarbon accumulation.
出处
《石油实验地质》
CAS
CSCD
北大核心
1992年第3期272-281,共10页
Petroleum Geology & Experiment
