E Electric submersible pump (esp) systems are widely applied as an artificial lift method in oil production; however, their high electrical power demand makes energy efficiency a critical operational challenge, particularly in fields with a large number of producing wells. in field “x”, all producing wells are operated using esp systems driven by induction motors (im), which tend to exhibit relatively low efficiency under variable load conditions due to electrical and mechanical losses. this inefficiency leads to excessive power consumption and increased operating costs. therefore, the implementation of a more energy-efficient motor technology is required to improve overall esp system performance.this study evaluates the performance of permanent magnet motors (pmm) as a replacement for conventional induction motors in esp systems in field “x”, with a primary focus on electrical power consumption, system efficiency, and potential operating cost savings. the analysis was conducted on four selected candidate wells—a7, n11, nc19, and nc20—chosen based on their productivity-to-energy-consumption ratio (bfpd/kw). the study utilizes company-owned secondary data, including well conditions, existing esp configurations using induction motors, and actual operational data after pmm installation.the research methodology consists of collecting and interpreting historical esp performance data, estimating electrical power consumption based on running current and power factor, designing esp systems using pmm with esp design software, and conducting a comparative analysis between im- and pmm-driven esp systems. system efficiency was evaluated using power consumption (kw), produced fluid rate (bfpd), and the bfpd/kw ratio as key performance indicators.the results indicate that replacing induction motors with pmm significantly reduces electrical power consumption. total power demand decreased from 1,396.8 kw to 1,181.1 kw, corresponding to an average reduction of 14.93% (from 349.2 kw/well to 295.3 kw/well). at the same time, overall, esp efficiency improved substantially, as reflected by a 19.89% increase in the bfpd/kw ratio, from 34.29 bfpd/kw to 40.91 bfpd/kw. variations in efficiency improvement among wells were primarily influenced by differences in operating conditions and motor loading levels. the pmm demonstrated optimal performance when operated within a loading range of approximately 70–90%. from an economic perspective, the reduction in power consumption resulted in estimated annual electricity cost savings of approximately usd 203,928 for the four evaluated wells. if the pmm technology were implemented across the entire esp population in field “x”, the potential annual cost savings could reach up to usd 3 million.this study concludes that the application of permanent magnet motors in esp systems effectively enhances energy efficiency, reduces operating costs, and has the potential to extend equipment service life. the findings provide a strong technical and economic basis for large-scale implementation of pmm-based esp systems to support energy optimization and sustainable oilfield operations in field “x” and similar fields.