Design and test of embedded control device for electric heating of heavy oil

Abstract

In order to improve the heating efficiency of the electric heating system for heavy oil wells and solve the current situation that the heating operation control of the medium frequency power supply in the oilfield mainly relies on manual experience settings and low-efficiency automatic control resulting in electric power waste, an embedded control device for heavy oil electric heating was designed. Based on the non-embedded oil well production electrical signal, the electric power of the heavy oil production motor was used as the closed-loop feedback signal to obtain the reference input of the optimal oil temperature. On this basis, through the differential feedback link of the wellhead oil temperature, the temperature hysteresis effect was improved, and the energy-saving optimization control of the medium frequency power supply was realized. Through the design of the embedded hardware core circuit module and the development of the main software functions, not only the dynamic control of the electric heating process of heavy oil wells was realized, but also realized the real-time monitoring of various operating indicators on-site and in the cloud. The heavy oil well field test analysis showed that the designed heavy oil electric heating embedded control device could meet the production requirements of energy saving and safety in the well field, and the energy consumption was saved by 20%.

Keywords

heavy oil thermal recovery / medium frequency power supply / double closed loop control / embedded control / energy saving test

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