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Disposal countermeasures of drilling fluid in loess zone

机译:黄土区钻井液处置对策。

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A large quantity of waste drilling fluid and drainage are yielded during the exploration procedure of oil. These wastes may pollute soil, groundwater and surface water because of the surface leakage and overflow. The north of Shaanxi province, which is the oil production area of the Changqing Oilfield, was chosen as study area. Analysis of waste drilling fluid was carried out in five different wells sited in the study area. The results indicated that it was hard to achieve solid-liquid separation with physical method. The study put forward the solidification-after-gelout disposal technique for waste drilling fluid. In the technique, iron salts were chosen as gel breaker, fly ash and lime were chosen as curing agents and loess was chosen as supplementary material. The optimum conditions were investigated and the results of experiment showed that when the content of FeCl3 was 0.6 percent of waste drilling fluid, the content of fly-ash was 25 percent, the content of lime was 6 percent and the content of loess was 40 percent. The results showed that it was effective to use the technique for treating the waste drilling fluid.
机译:石油勘探过程中产生大量废钻井液和排水。这些废物可能由于表面渗漏和溢流而污染土壤,地下水和地表水。陕西北部是长庆油田的产油区,被选为研究区。在研究区域内的五口不同井中对废钻井液进行了分析。结果表明,采用物理方法难以实现固液分离。该研究提出了一种用于废钻井液的胶凝后凝固处理技术。在该技术中,选择铁盐作为破胶剂,选择粉煤灰和石灰作为固化剂,选择黄土作为辅助材料。研究了最佳条件,实验结果表明,当FeCl 3 的含量为废钻井液的0.6%时,粉煤灰的含量为25%,石灰的含量为6%。黄土含量为40%。结果表明,采用该技术处理废钻井液是有效的。

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