WAYS TO IMPROVE THE EFFICIENCY OF ELECTRIC SUBMERSIBLE PUMP UNITS FOR OIL PRODUCTION

Abstract

The relevance of the research is conditioned by the need to verify the data of «submersible motor – downhole compensator» node obtained on the simulation model with the results of bench tests. The downhole compensation of reactive power is a relatively new technology to improve the energy efficiency of oil production facilities compared to the existing methods. Due to the technical features of placement of reactive power compensators in the production string of an oil well, in some cases, it is not economically feasible to study the installation of an electric centrifugal pump with a downhole compensator to determine the optimal parameters of the installation at the real site. Therefore, the development of an adequate simulation model of the «submersible electric motor – downhole compensator» node is an important task, which allows solving the problems of construction, operation and modernization of electric submersible pumps at minimum material costs. The aim of the research is to study the downhole reactive power compensator in a Matlab Simulink software environment and experimental studies of an submersible asynchronous electric motor with an downhole compensator on a laboratory bench. Object: a submersible asynchronous electric motor with an intra-well reactive power compensator. Methods. SimPowerSystem library blocks of MATLAB Simulink software complex were used for development of the imitation model of submersible asynchronous electric motor. To check the adequacy of the simulation model, a submersible asynchronous electric motor and a prototype of an intra-well reactive power compensator were manufactured. Bench tests were carried out at the plant of Almaz LLC, which has licensed laboratories and certified specialists. Result. Simulation model of the load node «SEM-DRPC» (submersible electric motor-wellbore reactive power compensators) was developed to simulate electromechanical processes of the node. A prototype of an intra-well reactive power compensator was developed. Based on the results of bench tests of a submersible asynchronous electric motor with intra-well compensator, the operating characteristics were obtained. Verification of the data obtained on the simulation model with the results of the experiment is carried out. It is established that the developed simulation model of the load node «SEM-DRPC» adequately reflects the electromechanical processes of the node. Discrepancies between the calculated and the experimental data were less than 10 %. Prospects of experimental-industrial tests of the submersible asynchronous electric motor with intra-well reactive power compensator are determined.

Keywords

• downhole compensator
• simulation model
• submersible electric motor
• reactive power
• bench tests