Study On Oil Gathering Technology Of Single Electrothermal Pipe Of Yushulin Oilfield

Oil gathering technology of single electrothermal pipe which is being used in Yushulin Oilfield is a cost-effective oil gathering flow in developing subnival belt,low permeable sublayer,low productivity layer and subregion layer. Therefore, researches on the optimization of parameters of oil gathering flow of single electrothermal pipe are of significance to direct oil transportation and production, management security and energy saving.Combined with the practical needs of oil field, the parameters of oil gathering of single electrothermal pipe, such as the diameter of pipe,velocity of flow and pressure were optimized. The calculation formula of the maximum conductive heat quantity, which is the calculation formula of heating power, for the flow of the produced liquid in the pipe of the oil well was obtained, according to the formula of conductive heat quantity for the flow of the fluid in multilayer pipe. The calculation formula of the temperature drop of the single electrothermal pipe flow using the chosen heating power was established, and the corresponding method of numerical calculation was given. The method of single well shares one oil storage tank was replaced by the method of multiwell share one oil storage tank. The design scheme of oil gathering technology of single electrothermal pipe of Yushulin Oilfield was constituted, and the economic assessment was given.The oil gathering flow of single electrothermal pipe of the 7 wells was operated in Yushulin Oilfield practically, according to above research production. The results show that the relative percent errors between the calculated temperature values at the exit of the pipe and the measured those are within 5%, which proves the calculation formula of heating power,the calculation formula of temperature drop and the corresponding method of numerical calculation given in this paper are correct. All the excellences of the new hermetic oil storage tank using the method of multiwell share one oil storage tank were exerted adequately, and compared with the method of single well shares one oil storage tank, the cost of the method of multiwell share one oil storage tank was decreased by 23.9%. Electrothermal pipe can satisfy the need of production in rising temperature,heating and broken down of transportation of the produced liquid.