VOCs transportation,multiphase subsea pipeline,flow assurance,pipeline diameter optimization,life cycle cost ,"/> <b>VOCs输送多相流海底管道流动保障分析与经济性研究 </b> <div> <div id="ftn1"> <p class="MsoFootnoteText"> <span></span> </div> </div>

石油化工设计 ›› 2026, Vol. 43 ›› Issue (3): 29-36.doi: 10.3969/j.issn.1005-8168.2026.03.006

• 设计技术 • 上一篇    下一篇

VOCs输送多相流海底管道流动保障分析与经济性研究

朱倩苇   

  1. (中国石化工程建设有限公司,北京100101

  • 出版日期:2026-08-25 发布日期:2026-09-07
  • 作者简介:朱倩苇,女,2023年毕业于塔尔萨大学石油工程专业,获哲学博士学位,现从事储运工艺设计工作,工程师

Flow Assurance Analysis and Economic Study on VOCs Transportation in Multiphase Flow Subsea Pipelines

  1. (SINOPEC Engineering Incorporation, Beijing, 100101)

  • Online:2026-08-25 Published:2026-09-07

摘要:

针对某项目VOCs海底管道输送中的气液多相流共存、酸性腐蚀(H?S 1400 mg/m3)及流量大幅波动(10.35~111.32 t/h)等极端复杂工况,本研究采用流动保障模拟与综合经济性研究的耦合优化方法。依托专业某仿真软件完成多相流模拟计算,结合三阶流速约束准则(气相流速≤18.3 m/s、内壁剪应力≤120 Pa、冲蚀速率比EVR1.0)及清管最低压力需求[≥1.0 MPa(表)), 对VOCs输送多相流海底管道开展流动保障特性与经济性协同分析。研究结果表明,压缩机出口压力为1.0 MPa(表)、管道公称直径为500mm的结合方案,可满足工艺及酸性工况清管的需求,且整体经济性最优。研究结果可为存在冷凝相变的VOCs海底管道系统性优化提供理论支撑和工程借鉴。

关键词: VOCs输送   , 多相流海底管道  , 流动保障  , 管径优化  , 生命周期成本

Abstract:

For the extremely complex working conditions in VOCs transportation in subsea pipelines of a project, such as gas-liquid multiphase flow, acid corrosion (H?S 1400 ppmv), and large fluctuations in flow rate (10.35 to 111.32 t/h), this study proposes a coupled optimization approach that integrates flow assurance simulation with comprehensive economic study. Based on the multiphase flow simulation using a professional simulation software, a collaborative analysis on the flow assurance performance and economic feasibility of VOCs transportation in multiphase flow subsea pipelines is carried out incorporating third-order flow velocity constraint criteria (gas-phase flow velocity ≤ 18.3 m/s, inner wall shear stress ≤ 120 Pa, and erosional velocity ratio EVR < 1.0) and the minimum pressure requirements for pigging (≥ 1.0 MPaG). The results indicate that the combined scheme with a compressor outlet pressure of 1.0 MPaG and a DN500 pipeline offers the most cost-effective solution while satisfying the process and pigging requirements under acidic service conditions. This study provides theoretical support and engineering insights for the systematic optimization of subsea pipelines for VOCs with condensation phase change.

Key words: VOCs transportation')">

VOCs transportation, multiphase subsea pipeline, flow assurance, pipeline diameter optimization, life cycle cost