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本文运用钻井岩心观察、岩屑描述、铸体薄片观察、压汞分析等分析手段,对研究区飞仙关组储层特征进行研究。结果表明,飞仙关组储层发育位置受沉积相控制,台地边缘礁滩体储层发育在飞二段,岩性主要为泥晶云质灰岩,亮晶鲕粒灰岩、砂屑灰岩及残余颗粒云岩;台内礁滩体储层发育在飞三段,岩性以灰色鲕粒灰岩为主。储集空间以粒间孔、粒间溶孔、晶间溶孔及裂缝最为发育;喉道普遍狭窄,喉道类型主要是微—细喉型,少量中喉;平均孔隙度1.96%,平均渗透率0.19×10-3μm2,属特低孔低渗致密储层。区域上沉积相控制了储层的发育部位,暴露溶蚀及白云石化作用是优质储层形成的关键因素。
In this paper, the reservoir characteristics of Feixianguan Formation in the study area are studied by means of drilling core observation, lithic description, casting thin sheet observation and mercury intrusion analysis. The results show that the reservoir development of Feixianguan Formation is controlled by sedimentary facies, and the reservoirs of reef-shoal bank in platform margin are developed in Feier Sec. The lithology is mainly composed of mud-crystalline cloud-limestone, bright-grain oolitic limestone, Rock and residual dolomite. The reservoirs of the reef beach in Taiwan are developed in the third member of the fly and the lithology is dominated by gray oolitic limestone. Intergranular pores, intergranular dissolved pores, intergranular dissolved pores and cracks were the most developed in the reservoir space. The throat was generally narrow, the throat types were mainly micro-thin throat with a small amount of middle throat. The average porosity was 1.96% Rate of 0.19 × 10-3μm2, is a very low porosity and permeability of tight reservoirs. Sedimentary facies controlled the reservoir’s developmental sites, exposed dissolution and dolomitization, which are the key factors for the formation of high-quality reservoirs.