Conceptual Schematic Geologic Cross-Sections of the Geysers Steam Field
Abstract
While formerly studied in terms of ancient Franciscan stratigraphy, The Geysers Steam Field now offers new views and interpretations on the deeper structure and importance of the lithocap, main metagraywacke, and felsic intrusive basement units with respect to the huge fractured reservoir. The Big Sulphur Creek enhanced tectonic disruption area provides the best situation for shallow felsite injection, shallow reservoir top, metasomatism transformation, and profound fracture permeability. Steam cells commonly extend to great depths and laterally drop off sharply, with relatively flat lateral continuance in some resource areas. Injectate ponding may offer a third fluid interface for reservoir steam reserves. A possible boiled down residuum of complex evaporates and hematite has been viewed in one area of the field where the reservoir (proper) bottom was encountered. Such a deposit may exist along all reservoir cell(s) bottoms, where in numerous cases the reservoir proper has been seen to pass into a somewhat mysterious ultra-superheated reservoir.
- Authors:
- Publication Date:
- Research Org.:
- Diamond Shamrock Thermal Power Co., Santa Rosa, CA.
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 887156
- Report Number(s):
- SGP-TR-93-37
TRN: US200618%%164
- DOE Contract Number:
- AS03-80SF11459; AS07-84ID12529
- Resource Type:
- Conference
- Resource Relation:
- Conference: Proceedings, Eleventh Workshop Geothermal Reservoir Engineering, Stanford University, Stanford, California, January 21-23, 1986
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 02 PETROLEUM; BASEMENTS; CROSS SECTIONS; FRACTURED RESERVOIRS; FRACTURES; HEMATITE; PERMEABILITY; RESERVOIR ENGINEERING; RESIDUAL FUELS; STEAM; STRATIGRAPHY; STREAMS; TECTONICS; Geothermal Legacy
Citation Formats
Hebein, Jeffrey J. Conceptual Schematic Geologic Cross-Sections of the Geysers Steam Field. United States: N. p., 1986.
Web.
Hebein, Jeffrey J. Conceptual Schematic Geologic Cross-Sections of the Geysers Steam Field. United States.
Hebein, Jeffrey J. 1986.
"Conceptual Schematic Geologic Cross-Sections of the Geysers Steam Field". United States. https://www.osti.gov/servlets/purl/887156.
@article{osti_887156,
title = {Conceptual Schematic Geologic Cross-Sections of the Geysers Steam Field},
author = {Hebein, Jeffrey J},
abstractNote = {While formerly studied in terms of ancient Franciscan stratigraphy, The Geysers Steam Field now offers new views and interpretations on the deeper structure and importance of the lithocap, main metagraywacke, and felsic intrusive basement units with respect to the huge fractured reservoir. The Big Sulphur Creek enhanced tectonic disruption area provides the best situation for shallow felsite injection, shallow reservoir top, metasomatism transformation, and profound fracture permeability. Steam cells commonly extend to great depths and laterally drop off sharply, with relatively flat lateral continuance in some resource areas. Injectate ponding may offer a third fluid interface for reservoir steam reserves. A possible boiled down residuum of complex evaporates and hematite has been viewed in one area of the field where the reservoir (proper) bottom was encountered. Such a deposit may exist along all reservoir cell(s) bottoms, where in numerous cases the reservoir proper has been seen to pass into a somewhat mysterious ultra-superheated reservoir.},
doi = {},
url = {https://www.osti.gov/biblio/887156},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 21 00:00:00 EST 1986},
month = {Tue Jan 21 00:00:00 EST 1986}
}