Cerro Prieto cold water injection: effects on nearby production wells

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Description

The liquid-dominated Cerro Prieto geothermal field of northern Baja California, Mexico has been under commercial exploitation since 1973. During the early years of operation, all waste brines were sent to an evaporation pond built west of the production area. In 1989, cooled pond brines began to be successfully injected into the reservoir along the western boundary of the geothermal system. The injection rate varied over the years, and is at present about 20% of the total fluid extracted. As expected under the continental desert conditions prevailing in the area, the temperature and salinity of the pond brines change with the ... continued below

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22 pages

Creation Information

Truesdell, A.H.; Lippmann, M.J.; De Leon, J. & Rodriguez, M.H. July 1, 1999.

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Description

The liquid-dominated Cerro Prieto geothermal field of northern Baja California, Mexico has been under commercial exploitation since 1973. During the early years of operation, all waste brines were sent to an evaporation pond built west of the production area. In 1989, cooled pond brines began to be successfully injected into the reservoir along the western boundary of the geothermal system. The injection rate varied over the years, and is at present about 20% of the total fluid extracted. As expected under the continental desert conditions prevailing in the area, the temperature and salinity of the pond brines change with the seasons, being higher during the summer and lower during the winter. The chemistry of pond brines is also affected by precipitation of silica, oxidation of H{sub 2}S and reaction with airborne clays. Several production wells in the western part of the field (CP-I area) showed beneficial effects from injection. The chemical (chloride, isotopic) and physical (enthalpy, flow rate) changes observed in producers close to the injectors are reviewed. Some wells showed steam flow increases, in others steam flow decline rates flattened. Because of their higher density, injected brines migrated downward in the reservoir and showed up in deep wells.

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22 pages

Notes

OSTI as DE00760333

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  • Other Information: PBD: 1 Jul 1999

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  • Report No.: LBNL--44025
  • Grant Number: AC03-76SF00098
  • DOI: 10.2172/760333 | External Link
  • Office of Scientific & Technical Information Report Number: 760333
  • Archival Resource Key: ark:/67531/metadc715668

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • July 1, 1999

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • Sept. 1, 2016, 6:46 p.m.

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Truesdell, A.H.; Lippmann, M.J.; De Leon, J. & Rodriguez, M.H. Cerro Prieto cold water injection: effects on nearby production wells, report, July 1, 1999; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc715668/: accessed December 13, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.