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通过川东复兴场地区嘉陵江组储层薄片观察及物性资料对嘉一—嘉二2段储层特征、控制因素的研究表明,复兴场地区嘉一—嘉二2段储集岩的储集性能最好的是白云岩类,其次为细粒灰岩类。白云岩类储层发育有粒间、粒内、晶间、晶内溶孔和裂缝等储集空间,主要构成孔隙—裂缝型的嘉二2段储层。而灰岩类储层只发育有孔隙性溶孔(洞)和缝,主要构成裂缝—孔隙型的嘉一段储层。通过孔—渗、厚度分布对比可见,嘉二2段储层的储集性优于嘉一段,是嘉陵江组主要的储层发育段和油气聚集最有利部位,其原因是嘉陵江组储层受沉积、成岩和构造作用的控制和影响。沉积作用使储层早期分异,白云石化作用对白云岩类进行了改造,提高了嘉二2段储层储集性,构造作用为以上作用提供了条件。
Through the observation of reservoir slices and the physical data of the Jialingjiang Formation in Fuxingchang area, eastern Sichuan, the reservoir characteristics and controlling factors of the second member of Jiayi-Jiayilian Formation show that the reservoir properties of the second member of Jiayi-Jiaer 2 in Fuxingchang area The best is dolomite, followed by fine-grained limestone. The dolomite reservoirs are characterized by intergranular, intragranular, intragranular, intragranular dissolution pores and fractures, which mainly constitute the pore-fractured Jia 2 nd 2 reservoirs. However, limestone reservoirs only have porous dissolved pores (holes) and seams, which mainly constitute the fractured-pore type Jia-1 reservoir. Through the comparison of pore-permeability and thickness distribution, we can see that the reservoirs in Jia 2 nd Section are better than Jia-1 section, which is the main reservoir development section and the most favorable site for hydrocarbon accumulation in Jialingjiang Formation. The reason is that the reservoir of Jialingjiang Formation is affected by sediments , Control and influence of diagenesis and tectonics. Sedimentation caused the early differentiation of reservoirs and the dolomitization changed the dolomite classes and enhanced reservoir accumulation in Jia 2 nd Member. The tectonic action provided the conditions for the above actions.