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Interaction of cold-water aquifers with exploited reservoirs of the Cerro Prieto geothermal system

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Abstract

Cerro Prieto geothermal reservoirs tend to exhibit good hydraulic communication with adjacent cool groundwater aquifers. Under natural state conditions the hot fluids mix with the surrounding colder waters along the margins of the geothermal system, or discharge to shallow levels by flowing up fault L. In response to exploitation reservoir pressures decrease, leading to changes in the fluid flow pattern in the system and to groundwater influx. The various Cerro Prieto reservoirs have responded differently to production, showing localized near-well or generalized boiling, depending on their access to cool-water recharge. Significant cooling by dilution with groundwater has only been observed in wells located near the edges of the field. In general, entry of cool water at Cerro Prieto is beneficial because it tends to maintain reservoir pressures, restrict boiling, and lengthen the life and productivity of wells.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Interaction of cold-water aquifers with exploited reservoirs of the Cerro Prieto geothermal system
ISBN:
0934412677
Volume
14
Issue:
pt 1
Year Published:
1990
Language:
English
Publisher:
Publ by Geothermal Resources Council
Publisher location:
Davis, CA, United States
Larger Work Title:
Transactions - Geothermal Resources Council
First page:
735
Last page:
741
Conference Title:
1990 International Symposium on Geothermal Energy
Conference Location:
Kailua-Kona, HI, USA
Conference Date:
20 August 1990 through 24 August 1990