Abstract
Optimizing extensive ESP fields is a mandatory task in terms of carbon footprint and efficiency. The main goal is to keep the equipment running with the best efficiency as long as possible, acknowledging the ESP will show normal wear due to the operation. This analysis focuses on enhancing energy efficiency, allowing the definition of the true production capabilities by comparing operating conditions related to the motor technologies available for generating the best opportunities of improvement.
By observing the well production response to increased injection in a seemingly optimized condition, it was proceeded to replace the ESP, incorporating PMM technology and a downhole sensor. This enabled us to:
Define the actual IPR curve
Simulate the condition on the extracted equipment (IM without a downhole sensor)
Validate the deviation in ESP system efficiency
Verify ESP wear through bench testing
This approach allows for a comparison of extraction efficiency and the impact of wear associated with extended equipment run life.
Based on the study findings, it is inferred that in ESPs with extended run life (>2000 days), wear leads to a decline in energy and production efficiency, reducing efficiency by up to 18.6%. These results prompt preventive measures to optimize wells, boosting production without significantly altering energy consumption. This is achievable by transitioning to PMM-equipped systems, significantly enhancing overall efficiency. With these results, preventive actions can be taken to adapt the wells and obtain an increase in production without considerably modifying energy consumption. This is possible through changing technology, installing PMM equipment and significantly improving the efficiency of the system. In addition, it allows capturing production that was not considered, establishing the correct extractive status of the well. Additionally, the impact on energy efficiency contributes to the reduction of CO2 emissions and improvement in specific consumption (KW/m3/d). Ultimately, assessing a well's extractive condition considering wear, reduced lifting capacity, and increased power consumption of an ESP is crucial. This approach facilitates well adaptation planning, minimizing downtime impact, enhancing system efficiency, and capturing additional oil in genuinely underexploited wells, thus preventing equipment failure
This analysis provides an opportunity to accurately measure production status and true well potential. Enhancing extraction in these cases can significantly boost oil production (69% of increase in total fluid and about 150% in terms of net oil). The comparison performed considers post injection changes versus adequation of the system installing motors with PMM technology also around 17% savings in terms of energy are reached.
