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《Chemical Engineering of Oil & Gas》 2011-05
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Simulation and Analysis of High-Sulfur Gas Well Blowout Accident

Zhang Baozhu,Fan Jianchun,Ma Qingchun(Faculty of Mechanical and Transportation Engineering,China University of Petroleum,Beijing Campus,Beijing 102249,China)  
The initial and boundary conditions for numerical simulation of gas blowout with H2S were determined by Fluent software on the basis of investigations of relevant information of the well field in the hilly areas where there are many people.And the numerical simulation of H2S diffusion in blowout accident was made.After this,the concentration curve and spread range of H2S under the condition of wind were obtained from results of the simulation.The following conclusions were got through the analysis of simulation results.First,the diffusion of H2S is largely affected by wind and less affected by gravity because of the similar density of the air,so a higher concentration of H2S may exist at higher altitude in the initial stage.Secondly,zonal distribution is likely to be shown due to the influence by wind in the diffusion process of H2S,so people should escape along both sides of the wind when the gas blowout occurs.Thirdly,H2S may gather on the leeward side of the obstructions which do not affect the overall diffusion trend of H2S,but it has been proved that the leeward side of the obstacle is not safe.According to the simulation results,it will provide supports for early warning and rescue work of the sour gas blowout accident.
【Fund】: 中国石油中青年创新基金项目(2008D-5006-07-1)
【CateGory Index】: TE28
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