川中地区蓬莱构造JT1井区茅口组储层发育特征及主控因素OA

In order to further clarify the heterogeneity of Maokou Formation reservoir in JT1 well block of Penglai structure in central Sichuan Basin,based on core,physical properties,reservoir spatial characteristics and geo-chemical data,reservoir development characteristics and main controlling factors of Maokou Formation are ana-lyzed.The results show that Maokou Formation reservoir of JT1 well block develops 5 lithologies,including crystal-line dolomite,granular dolomite,crystalline limestone,granular limestone and biogenic skeleton limestone.Among them,crystalline dolomite,granular dolomite and granular limestone are the main reservoir rock types.Reservoir spaces include pores,caves and fractures,forming 3 types of reservoirs:pore type,fracture-vug type and fracture-pore type,with fracture-vug type being dominant,followed by fracture-pore type.The development of Maokou For-mation reservoir is mainly controlled by sedimentation,diagenesis and tectonic effect.The platform-margin shoals and intra-platform shoals developed in studied area have laid the material foundation for the development of high-quality reservoirs.The penecontemporaneous dolomitization,burial dolomitization and dissolution that occur during diagenetic processes all play a constructive role in reservoir development.Faults and fractures formed by tectonic ef-fect provide sites and channels for various dissolution and hydrothermal dolomitization processes.The research pro-vides theoretical guidance for hydrocarbon exploration in Maokou Formation of central Sichuan Basin.