TY - BOOK AU - Cuellar, Gustavo AU - Choussy, Mario AU - Escobar, David TI - Extraction-reinjection at Ahuachapan geothermal field U1 - 621.44 PY - 1978/// CY - California PB - Department of Energy KW - Energía Geotérmica KW - Hidrogeología KW - El Salvador N1 - El artículo es parte de: Second invitational well - testing symposium; 02841; A review of the geology and thermodynamics of the Ahuachapan Geothermal Field is give. The intensive mass extraction of the steam-water mixture started after the first unit began operating. The total mass extraction until August 1978, reach 50.478 kilotons. A continuous program of measurements was made in order to obtain a complete history of pressures, temperatura, and chemistry changes of the reservoir fluids as a result of the controlled extraction - reinjection system ER -