鄂尔多斯盆地中部古生界储层覆压物性特征

Reservoir properties under overburden pressure of Paleozoic in the middle area of Ordos Basin

低渗透储层的应力敏感性对储层流体的流动能力影响较大。对鄂尔多斯盆地中部地区古生界储层物性与上覆压力关系进行的实验研究表明,储层孔隙度、渗透率随着上覆压力的增大而呈现出减小的趋势。此外,分析了研究区上古生界低渗透砂岩和下古生界碳酸盐岩储层覆压物性的变化程度及其原因,这对于油气田开发调整措施的制定具有很好的指导作用。

The stress sensitivity of low permeability reservoir has great influence on the fluid flow capacity. The experimental study was carried out on the relationship between reservoir properties and overburden pressure of Paleozoic in the middle area of Ordos Basin. The result shows that the porosity and permeability become small with the increase of overburden pressure. The variation level and cause of reservoir properties in the low permeable sandstone and carbonate rock were analyzed, which has good effect to guide the exploitation and adjustment of oil and gas field.