Method and device for controlling heating of sucker rod

Abstract

The invention discloses a method and device for controlling heating of a sucker rod, and belongs to the field of oil field exploitation. The method comprises the steps that the temperature value of heavy oil at a wellhead of an oil well is acquired; when the temperature value is smaller than the maximum preset heavy oil temperature value and larger than a set value of the heavy oil temperature, the current balance degree and the current maximum load of a pumping unit of the oil well are obtained; the balance degree deviation is obtained; the maximum load deviation is obtained, wherein the maximum load deviation is the difference value between the current maximum load of the pumping unit and the historical maximum load of the pumping unit; according to the balance degree deviation and the maximum load deviation, the temperature deviation of the heavy oil in a shaft is determined on the basis of the fuzzy control method; the heating duration of the sucker rod of the pumping unit is determined on the basis of the PID control method according to the heavy oil temperature deviation in the shaft, the temperature value and the heavy oil temperature set value; on the basis of the heating duration, heating of the sucker rod is controlled. The method and device can ensure the accuracy of the heating duration, so that the recovery rate of the heavy oil is guaranteed, and waste of electricenergy is avoided.

Description

technical field [0001] The invention relates to the field of oil field exploitation, in particular to a method and device for controlling heating of sucker rods. Background technique [0002] At present, the total geological reserves of heavy oil in my country are about 1.2 billion cubic meters, and its annual output accounts for 9% of the total annual output of onshore crude oil. Therefore, how to effectively exploit heavy oil has become a hot spot in the field of oilfield exploitation. Heavy oil has high colloid and asphalt content, so heavy oil has high viscosity and poor fluidity, which seriously affects the recovery of heavy oil. However, the viscosity of heavy oil is very sensitive to temperature. It can effectively reduce the viscosity of heavy oil. Therefore, in order to improve the recovery factor of heavy oil, it is generally necessary to heat the sucker rod of the pumping unit in heavy oil production, so as to reduce the viscosity of the heavy oil during lifting ...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of low recovery of heavy oil and waste of electric energy in the prior art, the embodiment of the present invention provides a method and device for controlling the heating of sucker rods

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