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苏里格气田是典型的低效致密砂岩气田,主力储集层石盒子组盒8段具有低孔、低渗、低丰度并且有严重的非均值性特点。储集岩石的基本属性之一是非均值性,油气储集层的油气藏开发效果和渗透性都受其严重制约和影响。应用分析化验资料研究储层岩性、物性和孔隙结构等特征,对鄂尔多斯盆地X区块盒8段储层非均质性从层内、层间和平面3个层面进行了深入分析。研究结果表明,研究区盒8段层内非均质性均为中等-较强;盒8上到盒8下砂体发育程度逐渐增大、层间非均质性依次增强;盒8下和盒8上钻遇率依次降低,平面上的侧向连续性逐渐变好,非均质性依次增强。
The Sulige gas field is a typical low-efficiency and tight sandstone gas field. The 8th member of the Hehuangge gas field in the main reservoir shows low porosity, low permeability, low abundance and serious non-uniformity. One of the basic properties of reservoir rocks is heterogeneity. The development and permeability of oil and gas reservoirs are severely restricted and affected. The reservoir lithology, physical properties and pore structure are studied with the help of analytical laboratory data. The heterogeneity of reservoir 8 in Block X of Block X in the Ordos Basin is deeply analyzed from three layers: in-layer, inter-layer and in-plane. The results show that the intra-layer heterogeneity is moderate-strong in the 8th block of the study area, and the development of the sand bodies from the upper 8 to the 8th of the box is gradually increased and the inter-layer heterogeneity is enhanced in turn. Drilling on the box 8 in turn decreased the rate of succession, the lateral continuity of the plane becomes better, followed by enhanced heterogeneity.