一种压裂返排液模块化处理方法

发布时间：2018-01-12 04:26

本文关键词：一种压裂返排液模块化处理方法　出处：《西南石油大学》2017年硕士论文　论文类型：学位论文

更多相关文章： 页岩气 返排液 絮凝 DTRO膜 模块化

【摘要】：水力压裂技术是页岩气开发的核心技术之一,在水力压裂过程中会使用到大量的含有化学添加剂的压裂液。随着压裂过程的结束,压裂液的返排会引起严重的环境污染问题。因此,如果对压裂液进行有效地处理,在保护水资源和环境同时,还可以提高水的利用效率进而解决页岩气开采用水资源的匮乏问题。本文以非常规油气资源类的页岩气井和常规的压裂返排液为研究对象,提出模块化处理方式,设置相互独立且有承接关系的自由组合模块,以满足现场施工需求为基准组合,以达到返排液处理要求。返排液的处理思路包括膜系统预处理和回用技术,根据需求设置的模块有絮凝-预处理模块,膜处理模块和回用模块。基于絮凝理论及大量试验,获取了预处理最佳参数,测试了膜系统运行稳定性,同时对常规的胍胶回用技术进行研究。取得了以下成果:(1)筛选了适用于压裂返排液体系的无机高分子絮凝剂,引入高分子聚合物PDMDAAC进行复配,并进行表征。(2)使用响应面分析方法优化了复配絮凝剂的使用条件。在烧杯混凝试验中使出水COD有一定幅度下降,且大幅度降低了固相含量,优化了后续膜处理的水质。(3)在膜处理阶段,引入了常用在处理高难度污水的DTRO膜,配合前端超滤,使DTRO膜出水稳定且运行平稳。(4)对常规的胍胶压裂返排液重复利用提出对策及方案。
[Abstract]:Hydraulic fracturing is one of the key technologies for the development of shale gas, in the process of hydraulic fracturing will use large amounts of chemical additives of fracturing fluid. With the end of the fracturing process, flowback will cause serious environmental pollution problems of the fracturing fluid. Therefore, if effective treatment in fracturing fluid, in the protection of water resources and the environment at the same time, also can improve the efficiency of water use and to solve the problem of lack of water by the shale gas resources. In this paper, shale gas unconventional oil and gas resources and the conventional fracturing fluid as the research object, the modular mode, free combination module is arranged independently of each other and to undertake relations. To meet the needs of construction sites for the benchmark portfolio, in order to achieve fackflowwastewatertreatment requirements. Back drainage including membrane treatment system with pretreatment technology and back, according to the demand of setting module has flocculation pretreatment. The management module, film processing module and reuse module. Based on the theory of flocculation and a large number of tests, obtained the optimal parameters of pretreatment, the stability of membrane system was tested, and the conventional guar gum for reuse technology. The following results were obtained: (1) screening of inorganic polymer flocculant for fracturing fluid system the introduction of polymer PDMDAAC was investigated and characterized. (2) using the response compound flocculant use condition optimization method of surface analysis. In the beaker coagulation tests the effluent COD decreased to certain extent, and greatly reduce the solid content, optimize the quality follow-up membrane treatment. (3) in film processing stage, introduced the commonly used in DTRO film processing of high difficulty wastewater, with the front end of the DTRO ultrafiltration membrane effluent is stable and smooth operation. (4) on the back of the conventional fracturing measures and drainage reuse scheme is proposed.

【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X741

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