吐哈盆地台北凹陷深层含油气前景

HYDROCARBON POTENTIAL IN THE DEEP TAIBEI SAG IN TURPAN HAMI BASIN

吐哈盆地台北凹陷内二叠、三叠系两套烃源岩厚度大且分布稳定、具备良好的生烃条件，发育三套生储盖组合，以上二叠统为生油层，中、上三叠统为储油层的生储盖组合最为有利，而南部辫状河三角洲砂体是主要的储集体类型；下侏罗统存在两套局部储盖组合，其圈闭分布与二叠、三叠系的圈闭分布基本一致。综合评价认为：鄯善孤形带、红连区带、葡北带和北部山前带是台北凹陷开展深层油气勘探的有利区带。

Permian and Triassic source rocks have large thickness, stable distribution and better hydrocarbon generation condition in Taibei sag of Turpan Hami basin. Three sets of source reservoir cap assemblages are developed in Taibei sag, in which the combination of Upper Permian as source rock and Mid Upper Triassic as reservoir is the most favourable one, braided river delta sandbody in the south is dominant in reservoir type; two sets of local reservoir cap assemblages occur in the Lower Jurassic, the distribution of their traps coincides with Permian and Triassic traps.Comprehensive evaluation considered that Shanshan arc like belt, Honglian area, Pubei and northern piedmont belts are favourable one for deep hydrocarbon exploration in Taibei sag.