塔里木盆地阿克库勒地区油气地质特征及勘探前景

塔里木盆地北部阿克库勒地区,有3套烃源层,油气资源丰富。现今奥陶系顶面是一个大隆起,闭合面积5800km²;其上有T⁰₆、T⁰₅、T⁰₄三个重要不整合面;发育三组不同方向的断裂系统;下古、上古、中新生界3个构造层叠加发育6排构造带;发现落实57个局部构造和预测4个地层岩性圈闭;在奥陶系、石炭系、三叠系、下白垩统4个目的层找到13个油气田(藏)和含油气构造。该区具有多种圈闭类型,多期聚油成藏,储盖组合及圈闭形成期与油气运聚期匹配较好等特点。全面勘探开发,有望成为中国石油工业“稳定东部,发展西部”战略接替的首选地区。

THE CHARACTER AND PROSPECT OF THE PETROLEUM GEOLOGY OF THE AREA OF AKEKULE IN TARIM BASIN

There are three series of hydrocarbon source rocks in the area of Akekule, Tarim Basin.The petroleum resources are rich.The today’ s top surface of the Ordovician is a big rise,with closed area about 5800km².Overlaying on it,there are three important unconformity surfaces just called as t⁰₆,t⁰₅,and t⁰₄.There is developed three faulting systems in different direction and six structural zones in Lower and Upper Paleozoic and Meso-Cenozoic as superposed.There are founded 57 local structures and forecasted 4 stratigraphic-lithologic traps.13 oil-gas pools and structures have been found in four object layers of Ordovician,Carboniferous, Triassic,and Lower Cretaceous.It has the character of multi-type of trap,multi-time accumulation oil,combination of reservoir-cap rocks matched well with the time of trap close forming and oil gathering. Intensively exploring and developing this area,it would be the first choice for the tactic succeeding area of“stabling east and developing west”of the petroleum industry of China.