鄂尔多斯盆地北部上古生界天然气储层分布规律浅析

Analyse on distribution rule of the gas reservoir in the Upper Paleozoic in Northern Ordos Basin

通过对鄂尔多斯盆地北部上古生界天然气储层的综合研究,发现中部伊陕斜坡带上的大型岩性气田,其储层为河流-三角洲沉积体系的河道砂体和三角洲平原分流河道砂体,在平面上自北向南呈长条状分布,小规模的构造型气田和含气圈闭位于盆地周缘,认为沉积格局受古构造背景控制,构造控制沉积相带,沉积相带控制着气藏分布,是影响鄂尔多斯盆地北部天然气藏的分布规律的主要因素,据此指出了该区下一步的勘探区域。

In the Upper Paleozoic Erathem in north of the Ordos Basin, the gas reservoirs are the channel sand of river delta sedimentary system and the distributary channel sand of the delta--plain in the Yisban slope and they are strip--shaped from north to south. Some structure gas fields and gas traps located the edge of the Ordos Basin. These show depositional pattern is controlled by palaeostructure, structure controlled sedimentary faces and sedimentary faces controlled distribution of gas reservoir , Which is the main factor that affected distribution rule of the gas reservoir in north of the Ordos basin. All To indicate the field for the further exploration.