Study on Organic Matter Enrichment and Reservoir Characteristics of Permian Longtan Formation Shale in Southeast Sichuan

The study of reservoir space development characteristics and the geochemical parameters Permian Longtan Formation in southeast Sichuan Basin at Well X1 was analyzed by using core observations, optical thin-section Ar-ion polishing, scanning electron microscopy, nitrogen adsorption tests. Major trace elements samples, V/Cr, U/T, enrichment coefficients EF (Mo) (U), chemical alteration indexes CIA Sr/Cu, Mo, P, other index values different samples were calculated based on test organic parameters. depositional environment area systematically analyzed. a warm humid climate during deposition period. main body sedimentary water an oxygen-depleted state, portion it oxidized state with high biological productivity. Therefore, had small rate. clay mineral content matter sample played major role controlling space. minerals high, mainly chlorite mixed layer illite/smectite. Under microscope, observed that flake illite/smectite aggregate mostly developed interlayer pores or microfractures, which positive specific surface pore volume sample.