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Experimental investigation of the permeability of Kayenta and St. Peter sandstones to hypersaline brine in the temperature interval 70 to 90/sup 0/C at 10. 3-MPa confining pressure

Technical Report ·
DOI:https://doi.org/10.2172/5012114· OSTI ID:5012114
;

Permeabilities of 10.2 cm in length, 2.5 cm in diameter Kayenta (porosity, 20.7, +- 1.66%) and St. Peter (porosity, 13.6, +- 0.13%) sandstones to Magmamax No. 1 brine containing suspended solids were determined from 70 to 90/sup 0/C at 10.3-MPa confining pressure. Measurements were performed without filters, with one 10-..mu..m filter, and with two 10-..mu..m filters inserted upstream of the core sample. In all cases, there was a dramatic decrease in permeability within the first hour of flow or few hundred pore volumes of flow through the core. Experiments conducted without filters or with one filter yield permeabilities that represent both the rock and the 2- to 3-mm amorphous silica-iron layer on the top face of the core. The experimental results show that if the Salton Sea Geothermal Field (SSGF) were composed of porous, sedimentary formations similar to Kayenta sandstone, long-term injection of unmodified Magmamax brine would not be feasible. In the case of acidified brine, most of the permeability decline may result from the mobilization of calcite.

Research Organization:
California Univ., Livermore (USA). Lawrence Livermore Lab.
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
5012114
Report Number(s):
UCRL-52382
Country of Publication:
United States
Language:
English

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Related Subjects

15 GEOTHERMAL ENERGY
152002* -- Geothermal Data & Theory-- Properties of Minerals & Rocks
ACIDIFICATION
ALKALINE EARTH METAL COMPOUNDS
BRINES
CALCITE
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
DIAGRAMS
ELEMENTS
FILTERS
FLUID FLOW
GEOTHERMAL FIELDS
Geothermal Legacy
INFORMATION
IRON
LAYERS
MEDIUM TEMPERATURE
METALS
MINERALS
OXIDES
OXYGEN COMPOUNDS
PERMEABILITY
POROSITY
PRESSURE DEPENDENCE
REINJECTION
ROCKS
SALTON SEA GEOTHERMAL FIELD
SANDSTONES
SEDIMENTARY ROCKS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
TABLES
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
TRANSITION ELEMENTS