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针对海上钻井平台井喷事故特点,基于计算流体动力学(CFD)理论,建立了海上钻井平台井喷天然气爆炸事故的风险预测与评估模型,对不同风况、不同场景条件下的井喷天然气爆燃特性进行模拟和分析,探讨爆燃超压和爆燃火焰的发展规律,并评估其危害程度和影响范围。结果表明:钻台区域最大超压值为6.1 kPa,对平台结构及设备不会造成明显破坏,对作业人员有轻微伤害;悬臂梁内部最大超压值达到10.4 kPa,会造成平台结构、设备轻微损坏,对作业人员伤害严重;分析了不同场景条件下爆燃火焰的发展规律;高温燃烧火焰会严重影响平台结构、设备等钢材性能,导致设备损坏、结构失效甚至坍塌,对附近作业人员会有致命伤害。
According to the characteristics of blowout accidents at offshore drilling platforms, a risk prediction and assessment model of blowhole natural gas explosion at offshore drilling platform is established based on the CFD theory. The deflagration characteristics of blowhole natural gas at different wind conditions and different scenarios are simulated And analyze and discuss the law of development of deflagration overpressure and deflagration flames, and evaluate the harm degree and scope of influence. The results show that the maximum overpressure value in the drilling rig area is 6.1 kPa, which will not cause any obvious damage to the platform structure and equipment and cause slight damage to the operators. The maximum overpressure value in the cantilever beam reaches 10.4 kPa, resulting in platform structure with slight equipment Damage and serious damage to workers; analysis of the development of deflagration flames under different scenarios; high temperature combustion flame will seriously affect the performance of the platform structure, equipment and other steel, resulting in equipment damage, structural failure or even collapse, near the operating personnel will have a fatal hurt.