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川西三叠系飞仙关组海相鲕滩储层为一套亮晶鲕粒灰岩、生物碎屑灰岩和亮晶鲕粒白云岩储层,经过后期多次成岩和构造破裂作用改造而成,溶蚀孔、洞和裂缝十分发育。利用野外地质实测资料和室内分析化验资料,分析了碳酸盐岩储层的岩性特征、储集空间、储层类型及储集性能。储层的储集空间类型多样,孔、洞、缝十分发育,孔隙结构复杂。储层可划分为4种类型,其中飞三段鲕滩储层质量最优。储层质量的好坏和分布主要受沉积相类型、成岩溶蚀作用强度和构造破裂作用强度的共同控制。运用多因素分析法对该区优质储层的分布区域进行定量评价和预测,结果表明,优质储层主要沿绵阳安县茶坪、楠木园、梓桐宫、绵竹汉旺分布。
The Feixianguan Formation marine oolitic beach in the western Sichuan Basin is a set of sphalerite-oolitic limestone, bioclastic limestone and spar-crystal oolitic dolomite reservoirs that have been altered after multiple stages of diagenesis and tectonic rupture Into, corrosion holes, holes and cracks are well developed. Based on the field geological data and laboratory analysis data, the lithologic characteristics, reservoir space, reservoir types and reservoir properties of carbonate reservoirs are analyzed. The reservoirs have various types of reservoir space, well developed pores, holes and seams, and complicated pore structures. The reservoirs can be divided into four types, of which the quality of oolitic beach reservoirs is the best. The quality of the reservoir and its distribution are mainly controlled by the sedimentary facies, diagenesis and tectonic fracture strength. Multivariate analysis was used to quantitatively evaluate and predict the distribution of high-quality reservoirs in this area. The results show that the high-quality reservoirs are mainly distributed along Chaping, Nanmu Park, Zitonggong and Mianzhu Hanwang in Mianyang County.