Abstract: To promote the safe and efficient integration of renewable energy into oilfield power grids, an optimization plan for the reliability of grid-connected oilfield microgrid power supply based on wind-solar-storage complementary systems is proposed. Firstly, based on the supply and demand relationship of each energy unit in the microgrid, build the architecture of a grid connected microgrid for oil fields. Secondly, due to the uncertainty of wind and solar power, this article predicts short-term photovoltaic and wind power, and uses the grey wolf algorithm to optimize the scheduling of grid connected microgrids. Finally, the analysis results of the case study show that compared to traditional oilfield power supply systems, the optimized microgrid containing wind and solar power generation exhibits good power supply reliability.