井口硫化氢气体扩散及检测方法研究

Wellhead Hydrogen Sulfide Gas Diffusion and Detection

针对钻井过程中井口溢出的硫化氢气体在大气中扩散且难于检测的问题,建立井口位置流体力学模型。对无风和有风情况下硫化氢的浓度分布进行模拟,并对井口和方井处硫化氢检测方法进行研究。结果表明:无风情况下硫化氢气体容易在方井处积聚,风速对溢出口上部挡板空间硫化氢浓度分布影响很小,对方井处硫化氢浓度影响非常大。针对以上情况,建议在井口处安装倒置放置的扩散式传感器,方井处安装吸入式传感器。从而能更准确检测硫化氢浓度。

Build wellhead position hydrodynamics model , analog the hydrogen sulfide concentration in a condition of no wind or a wind and do researches about testing method of hydrogen sulfide at wellhead and cellar, aimed at hydrogen sulfide spreading and never being easily detected when it spills over from wellhead during drilling wells. It shows that without wind the hydrogen sulfide gas accumulates at the cellar and the speed of wind influents almost nothing on the distribution of the concentration of hydrogen sulfide at the board located in the wellhead and influents much to the hydrogen sulfide concentration at the cellar. Depending on that, a dispersive sensor upside down at the wellhead and a suction sensor at the cellar to test the hydrogen sulfide concentration accurately are suggested place.