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Title: Structural and sedimentological study of the Cerro Prieto geothermal field, Baja California, Mexico

Abstract

Geophysical and lithologic well logs from over fifty wells have been qualitatively and quantitatively analyzed using both manual and computer interpretation techniques. These logs were studied to make stratigraphic correlations throughout the Cerro Prieto field and to interpret the deltaic depositional environment of the field's lithologic units. Dipmeter and seismic data were of great value in making stratigraphic interpretations and extrapolations. Cross sections were constructed to illustrate lithofacies variations throughout the geothermal field. In turn, these sections were used to construct a three-dimensional model of the Cerro Prieto geothermal reservoir. Petrographic microscopy, scanning electron microscopy, and x-ray diffraction analyses of well-bore cuttings and cores were utilized to determine the degree and distribution of hydrothermal alteration by fluids at temperatures up to 350{sup 0}C, the origins of dissolution porosity, and the relative degree of fracture versus dissolution porosity. The results of these analyses were confirmed by log-derived determinations of formation fluid properties, porosity, and petrophysical properties and by studies of Cerro Prieto cores conducted under in-situ conditions. The results of this research were integrated into the Cerro Prieto reservoir model.

Authors:
Publication Date:
Research Org.:
Lawrence Berkeley Lab., CA (USA)
OSTI Identifier:
5663620
Report Number(s):
LBL-12187; CONF-8006217-1
ON: DE82007773
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: AAPG-SEPM-EMD annual convention, Denver, CO, USA, 8 Jun 1980
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; CERRO PRIETO GEOTHERMAL FIELD; GEOLOGY; DRILL CORES; GAMMA-GAMMA LOGGING; GEOLOGIC STRUCTURES; LITHOLOGY; MAPS; MEXICO; POROSITY; SEDIMENTS; STRATIGRAPHY; DEVELOPING COUNTRIES; GEOTHERMAL FIELDS; LATIN AMERICA; NORTH AMERICA; RADIOACTIVITY LOGGING; WELL LOGGING; Geothermal Legacy; 150202* - Geology & Hydrology of Geothermal Systems- Non-USA- (-1989)

Citation Formats

Vonder Haar, S. Structural and sedimentological study of the Cerro Prieto geothermal field, Baja California, Mexico. United States: N. p., 1981. Web.
Vonder Haar, S. Structural and sedimentological study of the Cerro Prieto geothermal field, Baja California, Mexico. United States.
Vonder Haar, S. 1981. "Structural and sedimentological study of the Cerro Prieto geothermal field, Baja California, Mexico". United States. https://www.osti.gov/servlets/purl/5663620.
@article{osti_5663620,
title = {Structural and sedimentological study of the Cerro Prieto geothermal field, Baja California, Mexico},
author = {Vonder Haar, S},
abstractNote = {Geophysical and lithologic well logs from over fifty wells have been qualitatively and quantitatively analyzed using both manual and computer interpretation techniques. These logs were studied to make stratigraphic correlations throughout the Cerro Prieto field and to interpret the deltaic depositional environment of the field's lithologic units. Dipmeter and seismic data were of great value in making stratigraphic interpretations and extrapolations. Cross sections were constructed to illustrate lithofacies variations throughout the geothermal field. In turn, these sections were used to construct a three-dimensional model of the Cerro Prieto geothermal reservoir. Petrographic microscopy, scanning electron microscopy, and x-ray diffraction analyses of well-bore cuttings and cores were utilized to determine the degree and distribution of hydrothermal alteration by fluids at temperatures up to 350{sup 0}C, the origins of dissolution porosity, and the relative degree of fracture versus dissolution porosity. The results of these analyses were confirmed by log-derived determinations of formation fluid properties, porosity, and petrophysical properties and by studies of Cerro Prieto cores conducted under in-situ conditions. The results of this research were integrated into the Cerro Prieto reservoir model.},
doi = {},
url = {https://www.osti.gov/biblio/5663620}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jun 01 00:00:00 EDT 1981},
month = {Mon Jun 01 00:00:00 EDT 1981}
}

Conference:
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