钻井液有毒硫化物分析及处理方法研究

Study on the Toxic Sulfide of Oilfield Drilling Fluids and Handled Method

油田钻井过程中往往随着地层特性产生硫化氢等有毒气体,浸入钻井液后形成有毒硫化物,容易对钻具和人身造成重大影响。通过分析钻井液中有毒硫化物的物质成分、特性及其对钻井工作的危害和影响,指出有效的钻井液硫化氢处理方法。在对钻井液选择、钻井液pH值调节、添加H2S处理剂等三种方法的对比分析基础上,针对这些方法除硫的优缺点,结合钻井液氧化除硫方法,提出基于金属盐的钻井液氧化除硫方法。通过实验表明,金属离子可以促进钻井液氧化除硫效率的提升;同时高阶氧化性金属盐具有很高的除硫效率,可以作为钻井液中处理硫化氢的有效添加物使用。研究结果对于油田用钻井液中有毒硫化物的处理具有一定的实际意义。

The oilfield drilling processes often produce properties, and the alyzing the material contaminated drilling fluid is easy ingredients, the properties id, the effective treatment method for drilling , the fluid taking drilling toxic gases such as hydrogen sulfide with the formation a significant impact to drill and person to have. By anwork hazards and impact of the toxic sulfide drilling flu- hydrogen sulfide is pointed out. Based on the three methods＇ comparative analysis of drilling fluid selection, drilling fluid pH value adjustment, adding H2S treatment agent, a metal salt-based drilling fluid oxide sulfur removal above three methods. The experiments show that, method is proposed with the advantages and disadvantages of the the metal ions can promote drilling fluid oxidation enhance sulfur removal efficiency, order oxidizing metal salt can be used as effective additives for drilling fluid handling hydrogen sulfide with its high sulfur removal efficiency. The study results take a practical significance for the treatment of oil- field drilling fluid toxic sulfide.