Management method of risk assessment of ultra-deep heavy oil ESP in Tahe Oilfield

In order to improve the management level and life of electric submersible pump (ESP) and to reduce lying rate, technicians selected nine "quantifiable and controllable" indicators from the eleven stages of ESP system life cycle. According to the relevance of index value and ESP life, the indicators were given different weights and scores to evaluate the running state of ESP. The ESP state was classified into excellent, good, normal, risk and high risk. Two aspects of works should be done in ESP system management. 1) Analyzing the factors influencing ESP running state, and taking the corresponding measures of production management and control; 2) Optimizing index parameters when selecting well, matching and designing ESP system management. Field applications in the past two years show that this method can objectively reflect the operation state of ESP, help to improve ESP operating life, and reduce lie well rate.