Subsurface Geological and Geophysical Study of the Cerro Prieto Geothermal Field

摘要

This subsurface investigation of the Cerro Prieto field and surrounding area was undertaken to provide information on its stratigraphy, structure, hydrothermal alteration, and reservoir properties for use in designing reservoir simulation models and planning development of the field. Another objective was to gain insight into the depositional, tectonic, and thermal history of the Cerro Prieto area. The following types of data were used in this study: (1) well sample descriptions and analyses (x-ray diffraction, petrography, and porosity-permeability); (2) well logs (spontaneous potential, resistivity, gamma-ray, density, sonic and caliper; (3) geophysical surveys (resistivity, gravity, magnetics, refraction seismic, reflection seismic, and seismicity); (4) physiography (modern depositional patterns and surface manifestations of faults); and (5) regional geology. The detailed interpretation of the subsurface geology presented should be useful for field development. (ERA citation 05:033554)