Characteristics of unconventional reservoir in Middle Devonian of Yunningdi 1 Well in Ninglang-Yanyuan Basin, Yunnan Province, China

摘要

1.Objectives Yunningdi 1 Well(YND1 Well)is a geological survey well,which is situated in the southern margin of the Ninglang-Yanyuan Basin,Yunnan Province,and its target layer is the Middle Devonian Dacaozi Formation.It drilled into Quaternary,Upper Devonian Lannijing Formation,Middle Devonian Tanshanping Formation,Middle Devonian Dacaozi Formation and partial Lower Devonian Daguaping Formation and ended at 1500.68 m.The total hydrocarbon logging measuring of this well is 1.5%−11.95%,which shows richness of gas.The well-head gas can be successfully ignited.The flame is stable and the height of the flame is 0.6−1 m(Zhang ZY et al.,2019).By analyzing the characteristics of the Devonian reservoirs in YND1 Well,the oil and gas reservoirs properties of the Devonian in the Ninglang-Yanyuan Basin can be further evaluated.