Aiming at the problems of nitrogen injection and back pressure control during the direct commissioning process,with the aid of SPS simulation calculation software,a calculation model for pipeline oil push gas was established.The advantages and disadvantages of nitrogen injection methods under the two working conditions of constant pressure nitrogen injection across the pipeline and segmented nitrogen injection was simulated.The analysis results show that the segmented nitrogen injection method in the pipeline saves about 33%of nitrogen usage compared to the full line different pressure nitrogen injection method.The seg-mented nitrogen injection during oil injection has a low air release rate,making it convenient for stable pressure regulation.Seg-mented nitrogen injection can reduce unnecessary energy consumption caused by overcoming air resistance before climbing over high points,making it safer and more economical compared to the full line nitrogen injection method.The research results pro-vide a basis for direct commissioning and nitrogen injection operations and back pressure control.
关键词
空管投油/注氮/背压/调节/仿真计算
Key words
direct commissioning/nitrogen injection/back pressure/adjustment/simulation calculation
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