复杂山区地形高含硫气井安全防护距离研究

通过对国内某重大高含硫井喷事故进行调查,采用大涡模拟方法对3口井井喷气体扩散进行模拟,计算不同风速风向在事故中造成的灾难后果,得出地形因素对于灾难的影响。通过计算不同浓度下的扩散距离,提出分析及计算安全防护距离的方法。根据计算结果的综合分析可以看到,其浓度扩散的最远距离位于带状分布以内。

A Method for Calculating Safety Distance of High-sulfide Gas Well in Complex Mountainous Terrain

Blowout of toxic gas diffusion from high-sulfur gas field does very great harm to the surrounding residents. Safety distance becomes an important protective measure, but it is difficult to accurately compute safety distance in complex mountain district. Through investigating a serious accident of high-sulfur blowout in China, adopting large eddy simulation method to simulate the gaseous diffusion in blowout, and calculating the accident results at different wind speed and direction, the influence of terrain on accident consequence was obtained. Through calculating the diffusion distance under different concentrations of hydrogen sulfide, an analysis and calculation method for safety distance was provided. Comprehensive analysis of the computation result show that the longest distance distributes within zonal zones. This conclusion offers a reference for safety distance standard.