草湖凹陷烃源岩含油气系统及评价

含油气系统从识别、划分到评价是一个完整的整体，其最终目的是要对各系统进行比较，筛选出最有勘探前景的系统，并指出勘探方向，以草湖凹陷为例，根据塔里木盆地最有影响的3次构造运动的时限和晚海两运动期下古生界大规模生烃及有效圈闭的形成为关键时刻，参考邻区资料，将研究区划分为海西期含油气系统、燕山期含油气系统和喜马拉雅期含油气系统，并对生烃亚系统进行划分和描述．计算了寒武-奥陶系、石炭系、二叠一侏罗系3套烃源岩的生油资源量及评价，并根据与邻区地质条件类比得出，研究区可供勘探的油气资源较为丰富，应进一步勘探和研究。

THE OIL AND GAS SYSTEM OF THE CAOHU DEPRESSION AND IT'S EVALUATION

The process of identification, partition and evaluation of an oil and gas system is the ultimate aid in identifying prospective foreground systems and in defining exploration techniques by comparing all systems. Taking the Caohu depression as an example, the Cahou, Hercynian, Yansan and Himalayan oil-gas systems and the producing hydrocarbon sub-system are plotted and described using the time limit of the most important three structural movements and the cosmical or conical shape of the hydrocarbon in the lower Paleozoic during the later Hercynian movement period. It calculates and evaluates the quantity of the hydrocarbon source rock in the Cambrian and Ordovician system, Carboniferous system, Triassic and Jurassic system. It concludes that the area is abundant in oil and gas resources and it should be explored and researched further according to the geological conditions of the near section.