台北凹陷鄯善弧形带前侏罗系石油地质条件初探

ON THE PRE-JURASSIC GEOLOGIC CONDITIONS OF SHANSHAN ARCH ZONE OF TAIBEI DEPRESSION

本文对吐哈盆地台北凹陷前侏罗系的地层分布、沉积演化、构造特征及生烃条件进行了分析和评价,认为台北凹陷二叠纪以来持续沉降,前侏罗系发育全,分布广,生烃条件好,勘探潜力大。鄯善弧形带不仅在侏罗系发现了大中型油气田,其深层的前侏罗系也有形成油气藏的有利地质条件,鄯深1号是探索台北凹陷深层的最有利目标。

This Paper analyzes and evaluates the pre - Jurassic stratigraphic distribution, depositional evolution, structural characteristics and hydrocarbon generating conditions in Shanshan arch zone, Turpan - Hami basin. Then to think that, Taibei depression had been subsiding continually since Permian. The pre - Jurassic strata developed completely and widely. The hydrocarbon generating conditions are good with high potentials in exploration in Shanshan arch zone, not only large hydrocarbon fields had been discovered in Jurassic, but also the pre - Jurassic provided with good geological conditions of forming hydrocarbon traps. The resource assessment of Triassic prospects is made with geological risk analysis method. It is submitted that Shanshen 1 prospect is the best target for explorating the deep strata in Taibei depression.