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位于鄂尔多斯盆地中部的苏里格西部,其上古生界砂层主要分布在山1、盒8段,受冲积平原及三角洲平原沉积体系控制。苏西虽具有广覆式生烃的特点,但受地势平缓、时代久远及储层非均质性等的综合影响,仅发育岩性圈闭油气藏,且将盒8分为明显的上、下两小段。通过百余口井的测井资料及试气数据的分析,盒8段气水分布在剖面上具有上气下水正常型及下气上水倒置型两种类型,而平面上气层则主要集中在研究区中南部,北部出水较多。
Located in the western part of the Sulige Basin in the middle of the Ordos Basin, the Upper Paleozoic sand layers are mainly distributed in the Shan 1 and the No. 8 blocks and are controlled by the alluvial plain and deltaic sedimentary system. Although Suxi has the characteristics of broad-cover hydrocarbon generation, due to the combination of flat terrain, long time ago and reservoir heterogeneity, only lithologic trap oil and gas reservoirs are developed, and box 8 is divided into obvious upper and lower strata. Under two short paragraphs. Through the analysis of well logging data and test gas data of more than 100 wells, the gas-water distribution in Box 8 has two types of normal gas-water launching and inverted gas-upshifting, while the gas layer on the plane is mainly concentrated In the central and southern part of the study area, there was more water in the north.