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Simulation of the Operating Conditions of Chuanping 4623 Gathering &Transporting Pipeline in Changqing Oilfield
Li Chuanxian, Liu Shuaishuai, Yang Fei
It is difficult to manage gathering & transportation pipelines because of their complicate operating conditions. Based on the Chuanping 4623 gathering & transportation pipeline in Changqing oilfield and its operating parameters. The appropriate models, such as flow pattern model, liquid holdup calculation model, pressure drop calculation model and wax deposition model, were selected by comparative analysis. Then, the variation of operating pressure, temperature, liquid holdup, effective inner diameter, gas/liquid superficial velocity and wax deposition rate with pipe distance and operating time was analyzed by programming and calculating the models. The simulating results showed that the wax deposition rate, pressure, temperature, liquid superficial velocity and liquid holdup reduced, while gas superficial velocity increased with the increasing of pipeline length (except for the first 60 meters). The wax deposition rate, temperature, gas/liquid superficial velocity increases, the pressure and liquid holdup decreased at the same node with the increase of operating time within 36 operating hours.
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