2 Matching Results

Search Results

Final Report: Natural State Models of The Geysers Geothermal System, Sonoma County, California

Description: Final project report of natural state modeling effort for The Geysers geothermal field, California. Initial models examined the liquid-dominated state of the system, based on geologic constraints and calibrated to match observed whole rock delta-O18 isotope alteration. These models demonstrated that the early system was of generally low permeability (around 10{sup -12} m{sup 2}), with good hydraulic connectivity at depth (along the intrusive contact) and an intact caprock. Later effort in the project was directed at development of a two-phase, supercritical flow simulation package (EOS1sc) to accompany the Tough2 flow simulator. Geysers models made using this package show that ''simmering'', or the transient migration of vapor bubbles through the hydrothermal system, is the dominant transition state as the system progresses to vapor-dominated. Such a system is highly variable in space and time, making the rock record more difficult to interpret, since pressure-temperature indicators likely reflect only local, short duration conditions.
Date: December 31, 2001
Creator: Brikowski, T. H.; Norton, D. L. & Blackwell, D. D.
Partner: UNT Libraries Government Documents Department

Engineering Geology of the Proposed Nuclear Power Plant Site on Bodega Head, Sonoma County, California

Description: From abstract: "This report summarizes the geology of a shaft excavated for the proposed nuclear reactor and discusses geologic features on Bodega Head and on Point Reyes peninsula that relate to geologic aspects of earthquake-resistant design."
Date: December 1963
Creator: Schlocker, Julius & Bonilla, Manuel G.
Partner: UNT Libraries Government Documents Department