关键词: 溶蚀作用, 高镁方解石, 构造期, 包裹体均一温度, 储层物性, 亮晶白云石, 孔隙度, 碳酸盐岩储层, 油气勘探, 成岩环境

Abstract: Based on the relations between the dissolution characteristics, the sequence of minerals filled in the pores and the homogenetic temperature of the inclosures in T₁j₂² carbonate reservoir of Huangcaoxia gas field in Eastern Sichuan, it is suggested that the reservoir had been subjected to dissolution for three times during the formation of the structure(during the uplifting of the fold). Its significance are: (1) the period of development of solution pores is in consistent with that of structure forming and the peak of generation and accumulation of the gas,which is favorable for the formation of gas reservoirs; (2) the superposition of the solution pores formed in three times improves the petrophysical properties of the carbonate reservoir; (3) the reasons that the structures control the variations of the petrophysical properties of the reservoir are explained; (4) the study of diagenesis is connected with the structure movement, which is favorable for directing the oil and gas exploration.