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塔里木盆地塔中地区Ⅰ号断裂带上奥陶统良里塔格组为目前国内较典型的碳酸盐岩油气储集层,且有巨大的勘探潜力,深入研究该套储集层的类型及分布对塔中地区的下一步勘探将具有重要的指导意义。通过大量岩心分析,根据孔隙度—渗透率相关关系将塔中地区Ⅰ号断裂带上奥陶统良里塔格组碳酸盐岩储集层划分为3种主要类型:孔隙型、裂缝型、裂缝—孔隙型。根据各单井储集层类型,结合沉积相及断裂等储集层影响因素,推断了良里塔格组3个岩性段的不同类型储集层的分布范围,认为裂缝型储集层最为发育,而最有利于油气成藏的裂缝—孔隙型储集层主要发育于良二段,孔隙型储集层分布范围较小。最后认为塔中Ⅰ号断裂带塔中82井区—塔中24井区为油气勘探最有利区。
The Upper Ordovician Lianglitage Formation in the Tazhong area No. 1 fault zone in the Tarim Basin is a typical reservoir for carbonate oil and gas reservoirs in China and has great exploration potential. The type and distribution of the reservoir The next exploration in the Tazhong area will be of great guiding significance. Based on a large number of core analyzes, the carbonate reservoirs of the Upper Ordovician Lianglitage Formation in the Tazhong area Ⅰ fault zone are divided into three main types according to the porosity-permeability correlation: pore type, fracture type, fracture- Pore type. According to the types of reservoirs in each well and the influencing factors of sedimentary facies and faults such as fractures, the distribution of different types of reservoirs in the three lithologic sections of Lianglitage Formation is inferred. The fractured reservoirs are the most Development, and the fractures-pore type reservoirs that are most conducive to hydrocarbon accumulation are mainly developed in the second member of Liangliang Formation and the pore-type reservoirs are distributed in a relatively small area. Finally, it is considered that the most favorable area for oil and gas exploration is Well 82 in Tazhong Ⅰ fault zone, and Tazhong 24 well in Tazhong area.