准噶尔盆地腹部地区石油地质特征及找油前景

PETROLEUM GEOLOGY CHARACTERISTICS AND PROSPECTS FOR HYDROCARBON IN HINTERLAND AREA OF JUNGGAR BASIN

准噶尔盆地腹部地区在前寒武纪结晶基底的基础上于石炭纪末—二叠纪早期形成了北西向错落有序的坳隆构造格局,它基本上控制着盆地主力烃源岩二叠系的空间分布和有利油气聚集带的位置。中晚侏罗世,在盆地腹部形成了北东向低幅隆起带,成为浅层侏罗系的勘探领域。盆地腹部生油凹陷面积大,且发育多套烃源岩层。从油气生成、运移、聚集及保存条件分析,莫索湾凸起、三南凸起、达巴松凸起、玛湖背斜、白家海凸起是盆地腹部近期油气勘探的有利地区,陆南凹陷、炮台凸起则为今后勘探接管区。

During Late Carboniferous to Early Permian,Junggar Basin's hinterland area has orderly formed a northwest- oriented depression-uplift structural framework on the Pre-Cambrian crystalline basement,which controls generally the spatial distribution of Permian as a main hydrocarbon source rock and position of favorable oil and gas accumula- tion belts in this basin. In the period of Middle-Late Jurassic,formation of northeast-oriented low-range uplift zone oc- curred in the hinterland, becoming a prospecting domain of shallow-layered Jurassic system. It covers a big area of source sag and has developed multi-stratified hydrocarbon source rocks. Analysed from generation, migration, accumulation and preservation of oil and gas, Mosuowan uplift, Sannan uplift, Dabasong uplift, Mahu anticline ,Baijiahai uplift become favorable areas for Prospecting hydrocarbon recently. In addition, Lunan sag and Paotai uplift will act as successor domains from now on.