Energy Loss Analysis and Conservation Potential Prediction for the Pipelines Network of Oil and Gas Gathering and Transferring System

Based on the establishment of energy balance model, energy loss rate and unit energy loss are proposed to evaluate the energy loss of pipelines, heat energy loss rate and pressure energy loss rate are used to analyze deeply the structure composition of pipeline. Thus the reasonable judgment about the situation of energy utilization for pipeline can be made and its transferring capability can be reflected actually. The energy loss evaluation and analysis calculation is done with the pipelines network of some oil and gas gathering and transferring system in Daqing oilfield. The results show that the average energy loss rate of the pipeline system is 11.81% and the average unit loss is 0.73 x 10⁵kJ/t⋅km, which has a certain energy conservation potential. Heat energy loss accounts for 96.24% and pressure energy loss 3.76% in the constitution of energy loss, which indicates that energy conservation should focus on how to save gas. In accordance with the actual operation situation of pipelines, this paper put forward a series of technical renovation measures for energy conservation, through which the annual energy conservation quantity can be estimated to be up to 5.58 x 10⁶MJ, that amounts to the energy of 1.30 x 10⁵m³ natural gas.