鄂尔多斯盆地西北部盒8段储层物性特征

Reservoir Physical Properties in the 8th Member of the Shihezi Formation,Northwest Ordos Basin

鄂尔多斯盆地盒8段地层是长庆油田的重点产气层段之一。通过对盆地西北部盒8段岩心、薄片、铸体薄片和扫描电镜等观察,结测井等数据的分析,对其岩石学特征、孔隙类型、储层物性特征及其受控因素等进行了研究。结果表明,盒8段岩屑石英砂岩、石英砂岩主要孔隙类型为次生孔隙和晶间孔,孔隙度和渗透率高值区都主要集中在研究区西南部,并且两个高值区域十分接近,是下一步勘探和开发的有利区域。

The 8th Member of the Shihezi Formation is an important gas productive reservoir in the Ordos Basin. Drilling core, thin section and cast thin section observations and study on scanning electron microscope in combination with actual data and well logging data analysis show that the reservoirs consists mainly of lithic quartzose sandstone and quartzose sandstone with secondary porosity and intercrystal pore. The two high-value areas of porosity and permeability in the southwest of the study area will be the preferred region for the future.