渤西油田严重段塞流控制措施数值模拟  

Numerical simulation on control measures of severe slug flow in Boxi Oilfield

作　　者：李长俊 吴畏 张黎 

机构地区：[1]西南石油大学石油与天然气工程学院 [2]中国石油西南管道公司

出　　处：《油气储运》2018年第1期95-100,共6页Oil & Gas Storage and Transportation

基　　金：国家自然科学基金资助项目"深水天然气水合物输送管道气液固三相流基础理论研究";51474184

摘　　要：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。采用OLGA软件对两平台之间的海底管道模拟计算得知,立管底部压力和管道出口瞬时液体质量流量发生剧烈的波动。为了防止严重段塞流危害管道及管道下游的工艺设备,分别对顶部节流法、多相泵增压法、气举法3种控制措施进行数值模拟,结果表明:3种方法均能很好地抑制严重段塞流。当节流阀开度为3%、多相泵安装在立管底部且增压为0.5 MPa、注气量为5 kg/s时,海管严重段塞流完全消除。综合考虑,最终推荐采用顶部节流法,建议节流阀开度为10%,以此有效地指导了渤西油田段塞流控制的工程实践。Severe slug flow occurs in the submarine mixed transportation pipeline between QK18-2 platform and QK18-1 platform in Boxi Oilfield. It is likely to cause the overflow of the separator due to the instability of the slug. In this paper, the submarine pipeline between QK18-2 platform and QK18-1 platform was simulated by OLGA software. It is shown that the pressure at the bottom of the riser and the transient liquid mass flow at the pipe outlet fluctuate violently. In order to prevent the slug flow from damaging the pipeline and the process equipments in the downstream of the pipeline, three control measures（i.e., top throttling method, multiphase pump boosting method and gas lift method） were numerically simulated by OLGA software. It is indicated that these three methods can well control the severe slug flow, The severe slug flow in the submarine pipeline is completely eliminated when the opening of throttle valve is 3%, the multiphase pump is installed at the bottom of the riser, the pressure is increased by 0.5 MPa, and the gas injection rate is 5 kg/s. Based on comprehensive analysis, it is ultimately recommended to adopt the top throttling method with the 10% opening of throttle valve. The research results play an important role in guiding the slug flow control in Boxi Oilfield.

关 键 词：严重段塞流 控制 数值模拟 顶部节流法 多相泵增压法 气举法 

分 类 号：TE832[石油与天然气工程—油气储运工程]