CPC E21B 43/26 (2013.01) [F15B 1/04 (2013.01)] | 13 Claims |
1. A method of controlling a quality of water used for storing and producing energy, comprising:
pumping the water down a well and into a hydraulic fracture in a rock formation around the well to store energy;
producing a portion of the water to provide a produced water up the well by reducing a pressure in the well before leak-off of the water from the hydraulic fracture;
measuring an amount of dissolved solid in the produced water to obtain a measured quality;
comparing the measured quality to a desired quality to obtain a compared quality;
diverting a first portion of the produced water to a treating process to produce treated water, wherein the first portion is determined based on the compared quality;
producing energy to provide a produced energy from a second portion of the produced water, wherein the second portion comprises the produced water less the first portion of produced water;
combining the treated water with the second portion of produced water to produce combined water comprising the desired quality; and
pumping the combined water down the well and into the hydraulic fracture in the rock formation around the well to store energy.
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