Abstract: The main oil and gas development area of Pinghu oil and gas field is in the east region of Pinghu main fault. Oil sourced mainly from semi-enclosed embayment dark mudstones and coals in the east hydrocarbon generation sag. Well XY was drilled in the west region of Pinghu main fault to make clear about the hydrocarbon bearing conditions in the west region of Pinghu main fault, and 12 m oil layer was penetrated. After production testing, 14.66×10⁴ m³ daily gas production was obtained, daily crude oil production is 107.8 m³. Great breakthrough has been made in oil and gas exploration in west region. Through oil and source correlation, it is believed that the oil and gas in the west region mainly migrated from east region of Pinghu main fault and then accumulated, and the source rocks in the west region also made certain contribution to oil and gas. It is found that there are a certain amount of hydrocarbon potential in the west region.