临兴–神府井区废弃钻井液处理技术

Treatment Technology of Waste Drilling Fluids in the Linxing-Shenfu Well Area

为了解决临兴–神府井区废弃钻井液处理效率低、处理成本高等问题,开展了废弃钻井液无害化处理与重复利用技术研究。在分析废弃钻井液特性以及处理难点的基础上,研发了无毒、廉价的复合高效固化剂和复合铝盐破胶剂,产生的破胶压滤液经处理后用于配制钻井液;结合减量处理设备,研究形成了废弃钻井液无害化处理与重复利用技术。现场试验表明,废弃钻井液经减量处理设备分离后,钻屑含液率低于30%,钻屑质量减少20%~40%;固相含量大的废弃钻井液加入15%固化剂进行固化处理,24 h后即可直接运输,3 d后固化物浸出液满足环保要求;含水率较高的废弃钻井液中加入4.29%破胶剂,即可实现高效破胶,破胶压滤液经处理后可用来配制钻井液,其性能满足钻井要求。废弃钻井液无害化处理与重复利用技术解决了临兴–神府井区的废弃钻井液处理难题,具有较好的推广应用价值。

In order to solve the problems of low treatment efficiency, high treatment cost of waste drilling fluids in the Linxing-Shenfu Well Area, a technical research on harmless treatment and reuse technology of waste drilling fluids was carried out. After analyzing the characteristics of the waste drilling fluids and the difficulties in the treatment, a non-toxic composite curing agent with low cost and high efficiency, as well as aluminum salt gel breaker were developed, and the gelbreaking filtrate produced was processed for compound drilling fluids. Combined with the reduction treatment equipment, a harmless treatment and reuse technology of waste drilling fluids was formed. The field test results showed that the liquid content of cuttings was less than 30% and the weight of cuttings reduced by 20%–40% after the separation of the waste drilling fluids by reduction treatment equipment. The waste drilling fluids with high solid content can be directly transported 24 hours after the addition of 15% curing agent, and the leaching fluid can meet the requirements for environmental protection after 3 days. When a 4.29% gel breaker was added to the waste drilling fluids with high water content, a high-efficiency gel breaking can be achieved. The gel-breaking filtrate can be used for compound drilling fluids after treatment, which can meet the operational requirements for drilling. The harmless treatment and reuse technology of waste drilling fluids have solved the problem in treating waste drilling fluids in Linxing-Shenfu Well Area, with good promotion and application value.