Study on the optimization of steam heating system of hollow sucker rod in viscous oil production

Steam heating system of hollow sucker rod is a practical technique suitable for the production of high pour-point and high viscosity oil.But up to now,no reliable and systematic optimization method is applied well in site.For the purpose of decreasing energy consumption,increasing the economic benefit and cutting down the time of calculation,research on parameter optimization of the technique is presented in the paper.Firstly,this paper presents a parameter optimization model of the technique,in which the least cost is taken as objective function and the restriction of the crude oil’s temperature being not lower than inflection temperature as constraint condition.Secondly,numerical calculation method is adopted here to solve the mathematical model of temperature field since the model is a normal differential and non-linear equation group under the condition of half-concealed edge and its analytical solution is difficult to obtained.Considering that numerical calculation is time-consuming,leading a much long needed time of parameter optimizing,genetic algorithm with restrictions is adopted to optimize the injection parameters.The results show that the optimization based on numerical solution and genetic algorithm may shorten the calculation time and cut down the cost of energy obviously.