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鄂尔多斯盆地许湾子区块位于陕北斜坡中部偏西,构造平缓,成藏因素主要受沉积相带的变化及储层岩性、物性控制,是鄂尔多斯盆地中生界多油层发育区之一。从岩石学特征、储集空间类型、孔隙结构与特征、储层物性特征等角度出发,利用岩心、压汞等测试资料,从储层微观特征分析入手,深入、系统地探讨该地区储层岩石学、储层物性和孔隙结构等特征,对鄂尔多斯盆地许湾子区块长61油层组储层特征进行研究。研究结果表明该区非均质性较强,属于低孔低渗性储层。
The Xuwanzi block in the Ordos Basin is located west of the middle part of the northern Shaanxi slope and has a gentle structure. The reservoir forming factors are mainly controlled by changes in sedimentary facies and reservoir lithology and physical properties, and are one of the Mesozoic multi-reservoir development zones in the Ordos Basin. Based on the petrological characteristics, reservoir space types, pore structure and characteristics, physical properties of reservoirs and so on, using the test data of core and mercury intrusion, starting with the analysis of micro-features of reservoirs, Reservoir characteristics and pore structure, and studied the reservoir characteristics of Chang 61 reservoir in Xuwanzi block, Ordos Basin. The results show that the area is highly heterogeneous and belongs to low porosity and permeability reservoirs.