油气田开采钻井岩屑分类利用处置现状及环境管理

Current utilization, disposal and environmental management of drilling cuttings from oil and gas field exploitation

  • 摘要: 油气开采过程会产生大量水基钻屑和少量油基钻屑。当前,油气田钻井岩屑大多采用不落地处理工艺进行初步收集处理。钻井岩屑通常具有较高的pH、盐离子浓度、COD和含油量(油基钻屑)等,其合理处理处置是油气田绿色发展面临的一大难题。对比分析了国内外钻井岩屑的环境管理现状,系统梳理了我国钻屑环境管理方面存在的问题。同时,基于钻井岩屑污染特性综述了其后续资源化与无害化技术的研究和应用现状,并分析了各技术优缺点和处理效果。最后,对我国钻屑利用与处置提出了“建立水基钻屑分级分类管理制度、完善钻屑利用处置过程环境管理体系和加强钻屑源头减量和末端利用”的对策建议。

     

    Abstract: Large quantities of water-based drilling cuttings and small quantities of oil-based drilling cuttings are produced in the process of oil and gas exploitation. Currently, drilling cuttings are preliminarily collected and processed by non-landing treatment in most oil and gas fields. The drilling cuttings have the characteristics of high pH, high salt ion concentrations, high COD, and high oil content for oil-based drilling cuttings, and therefore, the rational treatment and disposal of drilling cuttings is a difficulty for the green development of oil and gas fields. The current environmental management of drilling cuttings in China and other countries was compared and analyzed, and the corresponding problems of environmental management in China were identified. Based on the pollution characteristics of drilling cuttings, the research and application status of the follow-up resource and harmless technologies were summarized, and the treatment effect, the advantages and disadvantages of each technology were analyzed. Finally, some suggestions were put forward for the utilization and disposal of drilling cuttings in China, including establishing a water-based classification management system, improving the environmental management system for their utilization and disposal process, and strengthening the source reduction and end uses.

     

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