成都理工大学学报（自然科学版）2012，Vol.39Issue(3)：269-276,8.
四川盆地中部嘉二段储层特征及成因
Characteristics and genesis of reservoirs in Lower Triassic Jialingjiang Formation, central Sichuan Basin, China
摘要
Abstract
Through a comprehensive analysis of the data on the drilling, logging and core in Member 2 of Lower Triassic Jialingjiang Formation (T1j2), the authors consider that oolitic limestone reservoirs, dolarenite reservoirs and crystal dolomite reservoirs are important reservoir types in Tij2 of central Sichuan Basin. The oolitic limestone reservoirs are dominated by isolated intragranular solution holes and moldic pores in the reservoir space. Between the pores, there are less developed throats mainly being miniature, leading the reservoirs to manifest medium porosity and low permeability. The dolarenite reservoirs are dominated by residual intergranular pores and intergranular solution holes in the reservoir space. Between pores, there are well developed throats mainly being neck down, leading to the good reservoir capability with medium porosity and permeability. The powder crystal dolomite reservoirs are dominated by intercrystal pores and intercrystal solution holes in the reservoir space. Between the pores there are well developed throats mainly being lamellar, and the configuration relationship between pores and throats is better, and the reservoirs are characterized by medium porosity and permeability. The analysis result of the reservoir genesis shows that sedimentary microfacies are the precondition to form reservoirs. The oolitic limestone, psammitolite dolomites and crystal powder dolomites developing where all of those rocks in the microfacies of oolitic shoal, psammitolite shoal and dolomitic flat respectively, provide the material base for the formation of the reservoirs. A sub-microtopography highland in the platform can provide profitable conditions for the reservoir development. The syndiagenetic meteoric leaching is the key to form the oolitic limestone reservoirs, the preservation of primary intergranular pores is the key to form the dolarenite reservoirs, and the dolomitization is the key to form the powder crystal dolomite reservoirs关键词
碳酸盐岩/储层/成因/嘉二段/四川盆地中部Key words
carbonate rock/ reservoirs genesis/ Lower Triassic/ Jialingjiang Formation/ Sichuan Basin分类
能源科技引用本文复制引用
丁熊,谭秀成,周彦,陈景山,唐青松,胡雯雯..四川盆地中部嘉二段储层特征及成因[J].成都理工大学学报（自然科学版）,2012,39(3):269-276,8.基金项目
四川省矿产普查与勘探重点学科建设基金资助项目(SZD0414) （SZD0414）
