Development of a Three Dimensional Numerical Model and Evaluation of the Generating Capacity of the Dachny Geothermal Reservoir

Abstract

The spatial distribution of pre-exploitation conditions temperature and pressure distribution, liquid and vapor saturations, circulation characteristics of ture fluids) in the Dachny site of the novsky hydrothermal system, obtained by et using a 3-D mapping method, are revised on the basis of te simulations performed using the computer code TOUGH2 (Pruess, 1987, 1991). A 3-D model of the natural-state conditions at the Dachny site was developed. The fine-tuning of the model was achieved by comparing computed results to the observations made in geothermal wells flow-tested during 1983-88. Also studied was the behavior of the field in response to different exploitation scenarios assuming production from existing and additional wells needed to supply sufficient steam to a proposed 80 power plant.