鄂尔多斯盆地榆林地区山西组2段高效储集层形成的地质条件

FORMED GEOLOGIC CONDITION OF THE SHAN-2 FORMATION HIGHEFFICIENT RESERVOIR IN YULIN AREA OF ORDOS BASIN

鄂尔多斯盆地榆林地区山西组2段储集层是增储上产的现实产层。认为有利的沉积相带、砂岩结构粒度、碎屑组分是影响储集体物性的重要因素;多期分流河道砂体在侧向上相互连通为形成横向上分布稳定、规模较大的工业气藏提供了条件;烃类的早期侵位有利于储层原生孔隙的保存和次生孔隙的形成,对高效储集体的形成有着重要作用。

The Shan-2 formation reservoir in Yulin area of the Ordos basin is the flesh and blood reservoir of increasing reserves. Research has indicated that the advantaged sedimentary facies, sand structure granularity and chipping component are the important factors affected the physical property of the reservoir; the connexity of many phases distributary riverway sand in side direction has offered the condition formed the distributing stabilization in landscape orientation and biggish scale gas reservoir; early invading of hydrocarbon favored the preservation of primary and the shape of secondary pore, this has a important effect for the formation of the high efficient reservoir.