| Title | Subsurface Geological and Geophysical Study of the Cerro Prieto Geothermal Field |
|---|---|
| Authors | D. J. Lyons, P. C. van de Kamp |
| Year | 1979 |
| Conference | DOE-CFE Symposium on Cerro Prieto |
| Keywords | |
| Abstract | 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-permeabil ity); (2) well logs (spontaneous potential, resistivity, gammaray, 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 in this report should be useful for field development. A simplified version will be necessary for reservoir simulation modeling. The approach taken in the study and the concepts developed herein may be applicable to geothermal exploration and field development in other sedimentary basins. This paper represents an abbreviated version of a report in press which will be published by Lawrence Berkeley Laboratory under the same title (LBL-l0540). The LBL report provides a more detailed treatment of the topics discussed below including more cross sections and maps, well data plots, photomicrographs, and geophysical data as well as sections on the surface geophysical detection of geothermal anomalies and the thermaltectonic history of the Cerro Prieto area, which are not included here. |