储层非均质性对低渗透气藏富集规律的影响——以鄂尔多斯盆地苏里格气田苏X区盒8段为例

Influence of Reservoir Heterogeneity on Enrichment Law of Low Permeability Gas Reservoirs:Taking the P2h8 of Su X Block of Sulige Gas Field in Ordos Basin as an Example

在岩芯实验及测井资料的统计和分析的基础上,分别对苏里格气田苏X区的内上古生界石盒子组盒8段的盒8上、盒8下^1、盒8下^2三个小层的非均质性特征进行研究。结果表明,盒8段层内非均质性整体偏强。结合研究区试气试采生产数据,发现试采情况良好的井位多分布于非均质性较强的区域。受盒8段非均质性的影响,研究区内的气藏储层往往是孤立的,在平面内透镜状分布,因岩性及物性差异形成的有效圈闭是气藏富集的重要原因。

On the basis of core experiment and statistics and analysis of logging data,heterogeneity characteristics of three small layers of P2h8 of upper Paleozoic,He 8 upper,He 8 under 1,He 8 under 2,in Su X block of Sulige Gasfield are researched respectively.Combined with the test data in the study area,it is found that the well locations with good test mining are mostly distributed in areas with high heterogeneity.Influenced by the heterogeneity of P2h8,the gas reservoirs in the study area are often isolated and lenticularly distributed in the plane.The effective traps formed by the difference in lithology and physical properties are important reasons for gas reservoir enrichment.