|本期目录/Table of Contents|

[1]孟祥坤,陈国明,朱 渊,等.第七代超深水半潜式平台天然气井喷扩散模型试验与数值分析*[J].中国海上油气,2019,31(03):159-167.[doi:10.11935/j.issn.1673-1506.2019.03.020]
 MENG Xiangkun,CHEN Guoming,ZHU Yuan,et al.Model experiment and numerical simulation on gas dispersion from blowout in the 7th generation ultra-deepwater semi-submersible platform of China[J].China Offshore Oil and Gas,2019,31(03):159-167.[doi:10.11935/j.issn.1673-1506.2019.03.020]





Model experiment and numerical simulation on gas dispersion from blowout in the 7th generation ultra-deepwater semi-submersible platform of China
孟祥坤12 陈国明2 朱 渊2 刘长鑫2
1. 山东工商学院管理科学与工程学院 山东烟台 264005; 2. 中国石油大学(华东)海洋油气装备与安全技术研究中心 山东青岛 266580
MENG Xiangkun12 CHEN Guoming2 ZHU Yuan2 LIU Changxin2
1. School of Management Science and Engineering, Shandong Technology and Business University, Yantai, Shandong 264005,China; 2. Center for Offshore Engineering and Safety Technology, China University of Petroleum, Qingdao,Shandong 266580, China
第七代超深水半潜式平台 井喷 天然气扩散 模型试验 数值分析 影响因素 应对措施
the 7th generation ultra-deepwater semi-submersible platform blowout natural gas diffusion model test numerical analysis influencing factors countermeasures
针对深水钻井过程中天然气井喷失控扩散问题,以我国在建的第七代超深水半潜式钻井平台为研究对象,开展了井喷天然气射流与扩散规律研究。首先,基于几何和动力相似理论,设计了模拟试验系统,得到了钻台区不同采样点处可燃气体浓度随时间变化规律; 然后,采用基于计算流体动力学理论的通用FLACS系统,建立了平台尺度空间内井喷天然气扩散后果数值仿真模型,并对二者进行了对比分析,结果表明模型试验和仿真结果具有一致性,FLACS数值仿真计算结果直观且精度较高,所建立的数值模型可用于分析井喷可燃气体的扩散规律; 最后,以数值模型为基础,研究了平台所处区域典型风场的风向和风速对可燃气云扩散范围和运动方向的影响规律,分析了不同工况下的扩散危险区域,并从工程应用角度提出了风险控制与应对措施。本文研究结果可为我国第七代超深水半潜式钻井平台合理划分钻台区域上部模块危险区提供参考。
Aiming at the problem of gas diffusion gas after out-of-control blowout during deepwater drilling, the 7th generation ultra-deepwater semi-submersible platform under construction in China is taken as the research object to study the jet flow and diffusion laws of gas blowout. Firstly, a simulation test system was designed based on the theory of geometric and dynamic similarity, which could monitor the concentration of flammable gas at different sampling points over time. Secondly, a numerical simulation model was established using the CFD(computational fluid dynamics)-based FLACS software system to predict and evaluate the consequences of gas diffusion in the platform-scale space. The experiment and simulation results were compared and analyzed, and the results show that the simulation results are consistent with the results from the experiment, while the simulation results obtained from FLACS are more intuitive and precise. The contrast between these two methods illustrates the validity of the numerical model in handling with the flammable gas blowout and the dispersion law. Finally, based on the numerical model, the influence laws of wind direction and velocity on the diffusion range and movement direction of flammable gas cloud in the typical wind field of the platform area were studied, the diffusion danger areas under different working conditions were analyzed, and control and response measures were put forward from the perspective of engineering application. The research results in this paper can provide reference for the division of danger zones on drilling floor in topsides of the 7th generation ultra-deepwater semi-submersible drilling platform.


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*国家重点研发计划“海洋(深水)油气开采重大安全事故连锁风险演化、灾变机理及应对机制(编号:2017YFC0804501)”、 工业与信息化部“第七代超深水钻井平台创新专项(工信部联装[2016]24号)”部分研究成果。
第一作者简介: 孟祥坤,男,博士,讲师,主要研究方向为海洋油气装备安全技术。地址:山东省烟台市莱山区滨海中路191号(邮编:264005)。E-mail:wsdy1002@163.com。
更新日期/Last Update: 2019-05-20