Abstract: To address the demand for the green and low-carbon transformation of oilfield energy systems, a comprehensive evaluation method for multi-energy complementary systems at well sites is proposed. An evaluation index system is constructed based on four dimensions: economic benefit, energy utilization, clean and low-carbon level, and system reliability. The AHP-CRITIC combined weighting strategy is employed, integrating expert judgment and data characteristics to enhance the scientific nature of the weight assignments. Finally, the VIKOR multi-criteria decision-making method is applied to rank and optimize different equipment configuration schemes. Simulation analysis of three typical equipment configurations shows that this method can effectively identify the optimal configuration scheme, providing a scientific decision-making basis for the planning and design of multi-energy complementary systems at oilfield well sites.