skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Evolution of the Cerro Prieto reservoirs under exploitation

Abstract

The Cerro Prieto Geothermal field of Baja California (Mexico) has been under commercial production to generate electricity since 1973. Over the years, the large amount of Geothermal fluids extracted (at present about 12,000 tons per hour) to supply steam to the power plants has resulted in a reduction of pressures, changes in reservoir processes, and increased flow of cooler groundwater into the geothermal system. The groundwater recharging the reservoir moves horizontally through permeable layers, as well as vertically through permeable fault zones. In addition, the supply of deep hot waters has continued unabated, and perhaps has increased as reservoir pressure decreased. Since 1989, this natural fluid recharge has been supplemented by injection which presently amounts to about 20% of the fluid produced. Changes in the chemical and physical characteristics of the reservoir fluids due to the drop in pressures and the inflow of cooler groundwaters and injectate have been detected on the basis of wellhead data. These changes point to reservoir processes like local boiling, phase segregation, steam condensation, mixing and dilution. Finally, the study identified areas where fluids are entering the reservoir, as well as indicated their source (i.e. natural Groundwater recharge versus injectate) and established the controlling geologicmore » structures.« less

Authors:
;  [1];  [2]
  1. Lawrence Berkeley National Lab., CA (United States)
  2. Comision Federal de Electricidad, Mexicali (Mexico)
Publication Date:
Research Org.:
Lawrence Berkeley Lab., CA (United States)
Sponsoring Org.:
USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
OSTI Identifier:
554192
Report Number(s):
LBNL-40614; CONF-971048-
ON: DE97054555; TRN: 98:000062
DOE Contract Number:
AC03-76SF00098
Resource Type:
Conference
Resource Relation:
Conference: Geothermal Resources Council (GRC) annual meeting, San Francisco, CA (United States), 12 Oct 1997; Other Information: PBD: Jul 1997
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; CERRO PRIETO GEOTHERMAL FIELD; RESOURCE MANAGEMENT; MEXICO; GEOTHERMAL RESOURCES; RESERVOIR FLUIDS; HYDROLOGY; FLUID FLOW; RESERVOIR ENGINEERING; Geothermal Legacy

Citation Formats

Truesdell, A.H., Lippmann, M.J., and Puente, H.G. Evolution of the Cerro Prieto reservoirs under exploitation. United States: N. p., 1997. Web.
Truesdell, A.H., Lippmann, M.J., & Puente, H.G. Evolution of the Cerro Prieto reservoirs under exploitation. United States.
Truesdell, A.H., Lippmann, M.J., and Puente, H.G. Tue . "Evolution of the Cerro Prieto reservoirs under exploitation". United States. doi:. https://www.osti.gov/servlets/purl/554192.
@article{osti_554192,
title = {Evolution of the Cerro Prieto reservoirs under exploitation},
author = {Truesdell, A.H. and Lippmann, M.J. and Puente, H.G.},
abstractNote = {The Cerro Prieto Geothermal field of Baja California (Mexico) has been under commercial production to generate electricity since 1973. Over the years, the large amount of Geothermal fluids extracted (at present about 12,000 tons per hour) to supply steam to the power plants has resulted in a reduction of pressures, changes in reservoir processes, and increased flow of cooler groundwater into the geothermal system. The groundwater recharging the reservoir moves horizontally through permeable layers, as well as vertically through permeable fault zones. In addition, the supply of deep hot waters has continued unabated, and perhaps has increased as reservoir pressure decreased. Since 1989, this natural fluid recharge has been supplemented by injection which presently amounts to about 20% of the fluid produced. Changes in the chemical and physical characteristics of the reservoir fluids due to the drop in pressures and the inflow of cooler groundwaters and injectate have been detected on the basis of wellhead data. These changes point to reservoir processes like local boiling, phase segregation, steam condensation, mixing and dilution. Finally, the study identified areas where fluids are entering the reservoir, as well as indicated their source (i.e. natural Groundwater recharge versus injectate) and established the controlling geologic structures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jul 01 00:00:00 EDT 1997},
month = {Tue Jul 01 00:00:00 EDT 1997}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: