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- W115604674 abstract "The UCSD brine chemistry program is providing highly accurate models of the behavior of high temperature brines to be used by the geothermal community to optimize production, interpret formation behavior and assist in performance assessment. Models are now available as user-oriented programs packaged for both main frame and personal computers (IBM and Macintosh). A manual describing the models and their application to various geothermal problems has been developed and made available to potential users. Tutorial sessions have been held and future sessions are planned. Present models can be used to predict the behavior of many important geothermal processes. For example, the tendency for production fluids to form carbonate, silica and sulfate scales can be predicted as a function of brine composition, temperature and CO{sub 2} partial pressure. The breakout pressure (onset of two phase flow) can be calculated as a function of temperature and brine composition. Preliminary models are available for characterizing H{sub 2}S gas/liquid distributions and the acid-base properties of the H{sub S}S-H{sub 2}O system as a function of brine composition, temperature and pressure. For the past year, a substantial part of this research has focused on the prediction of the properties of gases in the CO{sub 2}-CH{sub 4}-H{submore » 2}O system. We have developed highly accurate equations of state for each of the endmembers of the system for a pressure range of 0 to 8000 bar and temperatures from 0 to 1000 C. In order to treat the mixtures of importance to geothermal applications, a mixing model based on the end-members has been developed. The resulting equation of state for mixtures can be integrated analytically to obtain the free energies and enthalpies of the mixed gases for a temperature range of 50 to 1000 C and pressures from 0 to 3000 bar. Predictions of this model are within the accuracy of the experimental data and can predict the properties of the liquid phase, the gas phase and the coexistence of these phases with roughly equal accuracy.« less" @default.
- W115604674 created "2016-06-24" @default.
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- W115604674 date "1992-03-24" @default.
- W115604674 modified "2023-09-24" @default.
- W115604674 title "Geothermal Brine Chemistry Modeling Program" @default.
- W115604674 hasPublicationYear "1992" @default.
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