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通过岩心观察、物性分析、铸体薄片、扫描电镜、X-衍射等方法,对苏里格气田苏48区块盒8—山1段储层岩心样品进行分析测试,研究储层物性的主控因素。研究表明,苏里格气田苏48区盒8—山1段储层属低、特低孔低渗储层,其物性主要受沉积作用及成岩作用的控制。沉积作用通过控制储层的碎屑成分及沉积微相来控制其物性,心滩、边滩物性最好,分流河道次之,天然堤、分流间湾最差。压实作用是造成原生孔隙减少的主要原因,后期胶结作用产生的硅质、碳酸盐胶结物,特别是石英的次生加大,使得储层物性变差,溶蚀作用产生次生溶蚀孔,改善了储层的储集和渗流能力,微裂隙化作用使储层连通性提高,渗透性也就大大提高,储层物性得到进一步改善。
Through the core observation, physical property analysis, cast thin slice, scanning electron microscope, X-ray diffraction and other methods, the reservoir core samples of 8-8 Shan 1 block in Su 48 block are analyzed and tested, factor. The results show that the reservoirs in the lower part of the 8-8 Shan 1 section of the Su 48 block in the Sulige gas field belong to low and ultra-low porosity and low permeability reservoirs, and their physical properties are controlled mainly by sedimentation and diagenesis. Sediment function controls the physical properties by controlling the detrital composition and sedimentary microfacies of reservoirs. The physical properties of the heart beach and the beach are the best, followed by the distributary channel, the natural embankment and the shunt bay. The compaction is the main reason for the reduction of primary porosity. The secondary growth of siliceous and carbonate cements produced by cementation in the later stage, especially quartz, makes the reservoir properties worsened and the dissolution eroded secondary dissolution pores. Improved reservoir reservoir and seepage capacity, micro-fission to improve reservoir connectivity, permeability will be greatly improved, reservoir physical properties have been further improved.