基于CFD的高含硫天然气井井喷失控射流数值模拟研究

A Study Based on the CFD for Jet Simulation about High-sour Gas Well Blowout Out of Control

利用计算流体动力学方法研究高含硫天然气井井喷失控喷射流场,建立井喷射流场数值计算模型,研究单一组分气体射流与多种不同气体组分情况下流场特征。结果表明:多组分气体射流扩散性要比单一组分更强,且各组分气体在空气中扩散很快,在距离井口垂直高度10 m的范围内,硫化氢质量百分比从20%衰减到5%以下,甲烷质量百分比从80%衰减到20%以下,甲烷在射流方向上的衰减速率要高于硫化氢。

Calculated the jet flow field about high - sour gas well by using the computational fluid dynamics approach, established numerical calculation model about blowout jet flow field, the single component gas jet and a variety of different gas composition conditions mean field characteristics are studed, and the results show that： the muhicomponent gas jet diffusibility than a single component, stronger, and various components of the gas in the air diffusion soon, in the distance wellhead vertical height 10 m, within the scope of the hydrogen sulfide mass percent from 20% attenuation to less than 5%, the mass fraction of methane from 80% attenuation to less than 20%, methane in jet direction of attenuation rate than hydrogen sulfide.