Characterization of the Reservoir of the Los Humeros, Mexico Geothermal Field

Abstract

A general charactertzation of the Los Humeros, Mexico geothermal field is presented, based upon the reservoir engineering analysis. Well test data from 33 wells are analyzed and interpreted. The results two production intervals: A n upper interval between and 900 and a lower interval located below 700 masl. The area of the reservoir is 15.2 divided in two sectors: Colapso Central and Mastaloya. The first one hotter than the second one. Reservoir conditions locate thermodinamically the reservoir fluid in the subcooled region. very to saturation conditions. Low formation conductivity generates high pressure losses and reaches saturation conditions in the formation. As a consequence surface values are higher than the enthalpy of the fluid situ. Evolution to two phase in the formation causes dissolved salts concentration in the liquid phase and precipitation in the wells. This phenomena is severe when wells are producing from both production intervals. In causes corrosion in the wells, as shown in the Colapso Central sector,