鹿角场-李子坝地区茅口组储层特征及主控因素研究

The Reservoir Characteristics and Main Control Factors of Maokou Formation in Lujiaochang-Liziba Area

蜀南鹿角场-李子坝地区茅口组(P1m)为区内的有效储集层,结合岩心观测、薄片鉴定、分析化验等资料,详细研究了该层位的储集空间类型及物性特征,深入剖析了储层发育主控因素。结果表明:区内P1m沉积时期为台内滩沉积环境,岩性以颗粒灰岩为主,亮晶红藻灰岩、虫屑灰岩等次之;主要储集空间类型包括溶孔、溶洞、构造裂缝等;储层物性较差,为超低孔、超低渗储层;储层发育主控因素包括岩石类型、古地貌以及构造作用。

Maokou Formation(P1m)was an effective reservoir in Lujiaochang-Liziba Area.Combined with the data of core observation,thin section identification,and laboratory test,the reservoir space types and physical characteristics of Maokou Formation were studied in detail,the main controlling factors for the development of reservoir were analyzed deeply.The results show that the sedimentary period of P1 m in this area belongs to the beach sedimentary environment,the lithology is mainly of grain limestone,followed by sparry red algal limestone,insect crumbs limestone,etc.The main reservoir space types include solution pores,caves and structural fractures with poor reservoir property,which is the ultra-low porosity and ultra-low permeability reservoir.The main controlling factors of the reservoir development include the rock types,palaeo-geomorphology and tectonic actions.