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根据取心段的宏观及微观观察,结合压汞分析、薄片鉴定、测井识别等各种测试资料,对磨溪-龙女寺地区雷三段储层的基本特征和主控因素进行了分析,认为其储层集中分布在雷三段的上部,储层岩性以粉晶白云岩为主,砂屑白云岩较少;储渗空间以晶间孔、晶间溶孔和片状喉道常见,粒间溶孔和缩颈喉道少见;物性较差,多属于中孔低渗的裂缝-孔隙型储层。储层主要受到沉积和成岩作用的共同影响,其中局限台地是最有利于储层形成与演化的沉积相带,其次是台内点滩,储层多属于这些相带的沉积物经过后期白云石化、重结晶、埋藏溶蚀和构造作用改造后的产物。研究成果为研究区下一步的勘探部署提供了一定的地质依据。
According to macroscopic and microscopic observation of coring segment, the basic characteristics and main controlling factors of Leicao reservoir in Moxi - Longniansi area are analyzed with various test data such as mercury intrusion analysis, thin slice identification and well logging identification , And the reservoirs are mainly distributed in the upper part of Lei-3 Member. The lithology of the reservoirs is dominated by powdered dolomite and less sand-lithe dolomite. The inter-pore, intergranular dissolved pores and lamellar throat Common, intergranular dissolution and necking throat rare; poor physical properties, mostly belong to the pore permeability of the fracture - pore reservoir. The reservoir is mainly affected by both sedimentation and diagenesis. The restricted platform is the sedimentary facies that is most conducive to the formation and evolution of reservoirs, followed by the point beach in the platform, and the sediments mostly belonging to these reservoirs undergo dolomitization , Recrystallization, burial dissolution and tectonic transformation of the product. The research results provide a certain geological basis for the next exploration and deployment in the study area.