Heating power optimization of tubing electric heating well
In order to solve the problem of high energy consumption in tubing electric heating wells, the wellbore electric heating and viscosity reduction and lifting theory are applied to analyze the influence of electric heating power on the temperature field of the wellbore and the power consumption of the motor. On this basis, the best Electric heating power of tubing. Due to the physical properties of crude oil, it is difficult for heavy oil wells to produce normally under the best electric heating power. Combined with field application analysis, the optimization gives a reasonable electric heating power. Reasonable electric heating power should make the temperature of the crude oil in the wellbore higher than the freezing point temperature, so that the crude oil has better fluidity and ensure that the high viscosity oil is lifted to the surface. This optimization method can provide guidance for the optimization of other methods of electric heating power.
The principle of electric heating of oil pipe is to make use of the impedance of oil pipe, in the process of current conduction from top to bottom, make the temperature of the whole oil pipe rise and form heat source, so as to reduce the viscosity of crude oil and eliminate simple wax formation in well. In recent years, with heavy oil Wells wellbore electric heat tracing theory research, the optimization of electrical heating parameters has made many research results [, but for the determination of heating power, in order to avoid the crude oil in the wax crystal precipitation, avoid card production accidents such as well, often by large heating power to heating pipeline, electric heating equipment, electricity as much as 700 KWH, 4 to 5 times the energy consumption of well pumping unit. In order to realize energy saving production in heavy oil Wells, the influence of heating power on wellbore temperature field and motor output current is analyzed according to the existing unsteady heat transfer theory, and the most reasonable electric heating power is optimized by taking the power consumption of pumping unit and electric heating power consumption into comprehensive consideration.
1) The higher the power of electric heating of tubing, the higher the temperature of crude oil in wellbore; The consumption power of the motor decreases with the increase of heating power. When the heating power reaches a certain range, the consumption power of the motor does not decrease any more.
2) By analyzing the motor consumption power under different electric heating power, the optimal heating power is given, but the optimal heating power is not the optimal heating power
3) Reasonable electric heating power shall be used to keep the temperature of crude oil in the wellbore
Higher than the freezing point temperature, so that the crude oil has better liquidity, to ensure lift the crude oil to the ground.