EVALUATION OF COSTS AND METHODS FOR TREATING WATER EXTRACTED DURING CARBON STORAGE USING PRODUCED WATER QUALITY DATA
Few system models exist to evaluate treatment methods and costs for produced waters. Here we utilize water quality data collected from a number of sites in New Mexico and Colorado to develop cost profiles for transport, treatment, and disposal of extracted waters. Methods used for water handling and treatment in the oil and gas industry are combined with methods used for treating brackish and saline waters for drinking water. Extraction results obtained from CO2 injection simulations  demonstrate the applicability of the model to various time scales and fluid types and volumes extracted. We evaluate the effects of factors including the physical qualities of the water including temperature and density, pretreatment and desalination methods, concentrate disposal options, and transportation and storage of the water and brine concentrate wastes. These results have implications for understanding processes and costs for treating water extracted during carbon storage, during EOR, and fracture flowback scenarios.
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