海洋平台井喷含硫天然气扩散危险区域研究

发布时间：2018-02-09 23:53

本文关键词： 海洋平台井喷天然气硫化氢 FLACS　出处：《中国安全生产科学技术》2017年08期 　论文类型：期刊论文

【摘要】：针对海洋酸性气田开采过程中含硫天然气井喷失控扩散问题,采用CFD方法建立井喷含硫天然气扩散后果预测与评估模型。综合考虑天然气爆燃与硫化氢毒害风险因素,对不同场景条件下的含硫天然气扩散过程开展数值模拟,研究硫化氢浓度、风向、风速等因素对含硫天然气扩散行为的影响,预测和评估天然气扩散所形成的危险区域和硫化氢气体扩散所形成的毒害范围。研究表明:随着硫化氢浓度的增加,燃爆区域无明显变化,而毒害区域明显增加;船艉来风导致的事故后果最为严重,左、右舷来风有利于危险气体的扩散与消散;风速越大,燃爆区域和毒害区域范围越小,但是在船艏来风且风速较大的工况下,硫化氢气体竖直扩散距离降低且逐渐贴近生活区,容易造成作业人员中毒事故的发生。
[Abstract]:Aiming at the problem of out-of-control diffusion of sulfur-bearing natural gas during the exploitation of acid gas fields in the ocean, a model for predicting and evaluating the diffusion consequences of sulfur-containing well blowout gas is established by using CFD method. The risk factors of gas deflagration and hydrogen sulfide poisoning are considered synthetically. The effects of hydrogen sulfide concentration, wind direction and wind speed on the diffusion behavior of sulfur-containing natural gas were studied by numerical simulation under different scenarios. The dangerous area formed by natural gas diffusion and the toxic range formed by hydrogen sulfide diffusion are predicted and evaluated. The results show that with the increase of hydrogen sulfide concentration, there is no obvious change in the explosion zone, but the toxic area is obviously increased. The accident consequence caused by stern wind is the most serious. The left and starboard wind is conducive to the diffusion and dissipation of dangerous gas. The larger the wind speed is, the smaller the range of explosion area and toxic area is, but under the condition of high wind speed and high wind speed, The vertical diffusion distance of hydrogen sulfide gas is decreased and gradually close to the living area, which can easily lead to poisoning accidents of workers.
【作者单位】：中国石油大学(华东)海洋油气装备与安全技术研究中心;
【基金】：国家工信部第七代超深水钻井平台创新专项中国石油大学(华东)研究生创新工程资助项目(YCX2017054)
【分类号】：TE58

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