Abstract
It is of primary concern in developing a geothermal field to determine the size of the resource and the long-term response of the reservoir to significant fluid withdrawals. In most instances, only after a number of surveys and wells have been completed in the area can the details about the complex geologic and sedimentary structure be obtained which are needed for these predictions. At Cerro Prieto, a wealth of information on the geologic, chemical and reservoir engineering characteristics has been and continues to be collected. This makes Cerro Prieto an ideal field to which numerical modelling techniques can be applied in order to, for example: 1. (1) determine the energy potential of the system; 2. (2) investigate the reservoir behavior under different plans of exploitation; 3. (3) predict the magnitude of subsidence effects; and 4. (4) study various schemes for brine reinjection. Results of preliminary numerical simulations of the behavior of the Cerro Prieto field are discussed. The purpose of these studies is to examine: (1) the effect of using conventional isothermal methods of well test data analysis for geothermal systems, and (2) the influence of recharge from over under underlying aquifers on the temperature of a producing geothermal reservoir.
Published Version
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