Based on the data of 12 drilling cores, 8 imaging logs and 14 traditional logs in Moxi area, central Sichuan Basin, the major factors controlling the reservoir formation and favorable reservoir distribution are discussed in this paper through systematical analysis on the reservoir characteristics and types in Longwangmiao member. The Longwangmiao reservoirs primarily consist of medium-coarse grained dolomite, and dissolved pores are widely distributed in Moxi area, Sichuan Basin. Generally, the reservoirs are characterized by medium-high permeability, and can be divided into 3 reservoir types including dissolved hole type, dissolved pore type and matrix pore type. High-dip structural fractures, horizontal fractures, net-like diagenetic fractures and stylolites are also developed in Moxi area, which have close relationship with the 3 reservoir types and formed connected pore-system. The large-scale shore dolomite in Moxi area has experienced 3-stage karstification, and especially the surface dissolution stage has a significant influence on the large-scale hole-type reservoirs which extends over 5～20 km in horizontal. The good connectivity between wells is favorable for high-quality reservoirs in Sichuan Basin.
Xie Wuren Li Xizhe Yang Wei Ma Shiyu Wan Yujin Guo Zhenhua Zhang Manglang Su Nan Wu Saijun. Study on the characteristics, types and formation of the shore dolomite reserviors in Cambrian Longwangmiao member of Moxi area, Sichan Basin[J]. Chinese Journal of Geology, 2018, 53(2): 470-486.