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渤西油田QK18-2平台至QK18-1平台之间的混输海管存在严重段塞流现象,由于段塞的不稳定性,易导致分离器发生溢流造成危险。对两平台之间的海底管道采用OLGA软件模拟计算得知,立管底部压力和管出口瞬时液体质量流量发生剧烈的波动,为防止严重段塞流危害管道和管道下游的工艺设备,采用OLGA软件分别对顶部节流法、多相泵增压法、气举法三种控制措施进行数值模拟,结果表明:三种方法均能很好的控制严重段塞流,对其达到抑制效果。在节流阀开度为3%、多相泵安装在立管底部且增压为0.5 MPa、注气量为5kg/s时,海管严重段塞流完全得到了消除。综合考虑,最终推荐采用顶部节流法,建议节流阀开到10%。研究成果对渤西油田段塞流控制有很重要的工程指导意义。
There is a serious slugging phenomenon in the mixed pipeline between QK18-2 platform and QK18-1 platform in Boxi Oilfield. Due to the instability of the slug, it is easy to cause the separator to overflow. The submarine pipeline between the two platforms was simulated by OLGA software. The pressure at the bottom of the riser and the instantaneous liquid mass flow at the outlet of the riser fluctuated violently. In order to prevent the serious slugging flow from damaging the process equipment in the pipeline and downstream of the pipeline, OLGA software Three control measures of top throttling method, multiphase pump pressurizing method and gas lift method are respectively simulated. The results show that all the three methods can well control the slug flow and achieve the restraining effect. When the throttle opening is 3%, the multi-phase pump is installed at the bottom of the riser and the pressure is increased to 0.5 MPa and the gas injection rate is 5kg / s, the serious slug flow in the pipeline is totally eliminated. Taken together, the final recommended top throttling method, the proposed throttle open to 10%. The research results have important engineering guiding significance for plug flow control in Boxi Oilfield.