鄂尔多斯盆地西北部地区侏罗系成藏主控因素研究

FACTORS OF JURASSIC RESERVOIR MASTER NORTHWESTERN OF ORDOS BASIN

鄂尔多斯盆地我国第二大沉积盆地,蕴藏丰富的石油资源,是我国重要的能源生产基地。侏罗系是鄂尔多斯盆地中生界石油勘探开发的重要层系。勘探实践表明,鄂尔多斯盆地西北部侏罗系油藏平面上分布在古河道两侧,纵向上直罗组、延安组和富县组3个油层组均发现有油藏分布。应用多种方法对侏罗系油藏聚集成藏进行分析。结果表明,姬塬地区延长组长7优质烃源岩为该区域侏罗系多层系油藏聚集成藏奠定了资源基础,古河和裂缝系统是姬塬地区为油气的聚集提供通道,低幅度构造对侏罗系油藏具重要的控制作用。

The Ordos Basin is second largest sedimentary basin of China,It contains rich oil resources,is an im-portant energy production base. Jurassic strata are important oil exploration and development of Mesozoic OrdosBasin. Exploration and Practice shows that the distribution of northwestern of Ordos Basin Upper Jurassic reser-voirs on both sides of the plane in the ancient river,longitudinal Zhiluo,Yan'an Fuxian group and three groupswere found to have oil reservoir distribution. In this paper,a variety of methods are used to finish Jurassic reser-voir accumulation analysis. The results showed that Chang7 high quality source region for Jurassic Jurassic rocksgathered into resource base,The ancient river and fracture system is to provide access for the region accumula-tion of hydrocarbons,low amplitude control of important structures on the Jurassic reservoirs.