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| Numerical simulation of leakage and dispersion of acid gas in gathering pipeline |
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YU Hong-xi1,U Zhen-lin1,ZHANG Jian2,ZHANG Yong-xue1
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(1.College of Mechanical and Electronic Engineering in China University of Petroleum，Beijing 102249，China;2. Shengli Engineering & Consulting Limited Company，Shengli Oilfield，Dongying 257026, Shandong Province, China)
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| Abstract: |
| The characteristics of the dispersion of H2S and methane were firstly simulated by FLUENT software while the acid gas leaks from a gathering pipeline. It is found that the H2S pollution scope near the ground in horizontal is wide and the height of H2S cloud is low because of the influence of heavy gaseous-deposition. The excursion of H2S concentration increases in leeward direction with the elevation increasing because of the influence of natural wind. If the pipeline，for transportation of natural gas containing 5% H2S with pressure of 3. 5 MPa, leaks for 2 minutes, the explosion range is from 150 to 290 m and poisonous range is from 0 to 270 m in leeward direction. The H2S diffusion characteristic is similar to that in plain area when a gathering pipeline breaks down at hilltop terrain. |
| Key words: acid gas gathering pipeline dispersion numerical simulation |
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