Paper No. 10
Presentation Time: 10:40 AM


SULLIVAN, Enid J.1, PAWAR, Rajesh J.2 and CHU, Shaoping2, (1)Los Alamos National Laboratory, Chemical Diagnostics and Engineering Group, MS J964, Los Alamos, NM 87545, (2)Los Alamos National Laboratory, Computational Earth Sciences Group, MS T003, Los Alamos, NM 87545,

Extraction of in-situ water is one of the options for minimizing the impact of large-scale CO2 injection in saline aquifers or during enhanced oil recovery (EOR). The amount of water to be produced could be significant depending on in-situ conditions and injection parameters. Previously, we have shown that a variety of desalination technologies may be feasible depending upon water quality, temperature, and site conditions, using a system model, CO2-PENS, for assessment of geologic CO2 storage operations [1]. This integrated system model is designed to be used as a tool to determine effective water treatment/disposal options that predict various treatment processes and associated costs while taking into account the specifics of sequestration site parameters and operational conditions.

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 [2] 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.

1. Sullivan Enid J., Shaoping Chu, Philip H. Stauffer, Richard S. Middleton, and Rajesh J. Pawar, A method and cost model for treatment of water extracted during geologic CO2 storage. International Journal of Greenhouse Gas Control, 2013. 12(0): p. 372-381.

2. Klapperich Ryan J., IEAGHG, "Extraction of Formation Water from CO2 Storage", 2012, IEAGHG: Cheltenham, GLOS, United Kingdom.