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Optimal design of water networks for shale gas hydraulic fracturing including economic and environmental criteria

机译:页岩气水力压裂用水网络的优化设计,包括经济和环境标准

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This work proposes an optimization approach for designing efficient water networks for the shale gas production through the recycle and reuse of wastewater streams reducing the freshwater consumption and effluents considering economic and environmental goals. The economic objective function aims to minimize the total annual cost for the water network including the costs associated with storage, treatment and disposal (capital cost) as well as freshwater cost, treatment cost and transportation costs. The environmental objective is addressed to deal with the minimization of the environmental impact associated with the discharged concentration of total dissolved solids in the wastewater streams and the freshwater consumption through an environmental function that represents the benefit for removing pollutants using the eco-indicator 99 methodology. The methodology requires a given scheduling for the completion phases of the target wells to be properly implemented by the available hydraulic fracturing crews during a time horizon. The model formulation is configured to determine the optimal sizes for the equipment involved by the project, particularly the sizes for storage and treatment units are quantified by the optimization process. A case study is solved to evaluate the effectiveness of the proposed optimization approach.[GRAPHICS].
机译:这项工作提出了一种优化方法,用于通过对废水流进行再循环和再利用来设计用于页岩气生产的有效水网络,从而减少淡水消耗和考虑到经济和环境目标的废水。经济目标函数旨在使供水网络的年度总成本最小化,包括与存储,处理和处置相关的成本(资本成本)以及淡水成本,处理成本和运输成本。解决环境目标的目的是通过一种环境功能来最大限度地减少与废水流中总溶解固体的排放浓度和淡水消耗相关的环境影响,该环境功能代表使用生态指标99方法去除污染物的好处。该方法要求在一定时限内,由可用的水力压裂团队适当实施目标井完井阶段的时间表。配置模型公式以确定项目所涉及设备的最佳尺寸,尤其是通过优化过程来量化存储和处理单元的尺寸。解决了一个案例研究,以评估所提出的优化方法的有效性。[GRAPHICS]。

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