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在对野外剖面、岩心观察的基础上,通过薄片鉴定和物性资料的综合分析,对綦江区块寒武系娄山关组碳酸盐岩储层特征进行研究,结果表明储集层岩石类型主要为粉-细晶白云岩、颗粒白云岩;储集空间以次生孔隙为主,主要发育晶间孔、晶间溶孔、裂缝3种类型;储层物性较差,为低孔隙度、低渗透率的储层;研究认为成岩作用对储层具有控制性的影响:白云石化作用和压溶作用改善了储层的孔渗情况,压实作用和胶结作用则对储层孔渗起到破坏性作用,构造裂缝总体上改良了储层的孔渗能力。
Based on the field profile and core observation, the characteristics of carbonate rocks in the Cambrian Loushanguan Formation in the Qijiang block are studied by the comprehensive analysis of thin sections and physical data. The results show that the main types of reservoir rock It is mainly composed of fine-grained dolostone and dolomite. The main reservoir space is secondary porosity, mainly including intercrystalline pores, intergranular dissolved pores and fractures. The reservoir properties are poor, with low porosity and low porosity Permeability. The study shows that diagenesis has a controlling effect on reservoirs: dolomitization and pressure-dissolving can improve the porosity and permeability of reservoirs, and the compaction and cementation can damage the pores of reservoirs Sexual and structural fractures generally improve the porosity and permeability of the reservoir.