As an effective technique for exploration and development of lithologic reservoirs, curves and logging facies of several exploration wells and development wells in the facies analysis area were analyzed and sedimentary interpretation was carried out. Based on the analysis of well logs in the study area, this paper concluded that the main sedimentary facies in the study area are delta plain and fore-delta. It is concluded that the study area has experienced the sedimentary evolution process and sedimentary law of delta front, delta plain and delta front. It is pointed out that sedimentary micro-facies are the main oil and gas reservoir. Finally, the distribution and regularity of oil and gas enrichment areas are studied.