鄂尔多斯盆地东部上古生界储层特征

鄂尔多斯盆地东部上古生界储集岩大部分是石英砂岩,少数为长石砂岩。孔隙度在4.4%～17.8%。渗透率在(0.1～1.5)×10~(-3)μm~2,以低孔、低渗、较强的非均值性为特点。部尔多斯地区上古生界经历了海相-海陆交互-陆相长期而复杂的历史,鄂尔多斯盆地为一大型内陆湖盆。稳定的大地构造条件和沉积环境有利于大面积砂体的形成。

Reservoir characteristics of neopaleozoic in the east of ordos basin

In the neopaleozoic of ordos basin east,the most of reservoir rock is quartz sandstone and a little part of reservoir is arkose.The porosity of it ranges from 4.4% to 17.8%,and the permeability ranges from 0.1×10~(-3)μm~2to 1.5×10~(-3)μm~2.The reservoir rock is of low porosity and permeability and serious heterogeneity.Ordos Basin is a large inland lake basin.of which Paleozoic experienced a long and complex history of marine facies-paralic facies- nonmarine faciesThe stable structural condition and sedimentary environment are beneficial to the formation of large sand bodies.