PREDICTION OF BOILING, SCALING AND FORMATION CONDITIONS IN GEOTHERMAL-RESERVOIRS USING COMPUTER-PROGRAMS TEQUIL AND GEOFLUIDS

Predictions of boiling, scaling, and solubility of gases are important to the exploitation of geothermal resources. These chemical phenomena are strong functions of the composition, temperature and pressure of the working fluid and are therefore difficult to predict from prior ex perience or tabulated data. Thermodynamic models of geothermal brine b ehavior recently developed by the authors are introduced and used to s tudy various problems involved in geothermal energy production. The mo dels have been extensively tested. Results of comparisons with laborat ory measurements indicate that predictions are very close to experimen tal data for a wide range of conditions. Comparisons with field data a lso show remarkable agreement. Here the models are also applied to the prediction of breakout and scale formation in geothermal wells. Good agreement is obtained with actual well performance. Copyright (C) 1996 CNR.