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The AAPG/Datapages Combined Publications Database
CSPG Bulletin
Abstract
C.S.P.G. 1990 Convention, "Basin Perspectives"
Overview of the Regional Subsurface Hydrogeology, Peace River Arch Area, Alberta and British Columbia [Abstract]
ABSTRACT
A basin-scale subsurface hydrogeological study was carried out in a region of about 220,000 km2, defined as 54-58°N (approximately Twp 58-103) and 114°W (5th Mer.) to the eastern margin of the disturbed belt. Regional stratigraphy is based on data from about 22,000 wells. Hydrogeological data from about 480,000 core analyses, approximately 42,000 bottomhole temperatures, 46,000 drillstem tests and 30,000 formation water analyses, were used in the study.
Using specially developed software, the hydrogeological data were variously interpreted, culled for erroneous values, and interpolated into a regional frame comprising 60 stratigraphic units. Based on lithology and the hydraulic and geochemical properties of the porous matrix and the formation waters, 32 aquifers, 23 aquitards and 5 aquicludes were identified in the hydrostratigraphic succession. Subsequent study using pressure-depth plots and regional hydraulic-head profiles allowed combination into aquifer and aquitard systems.
The regional subsurface hydrogeology is presented as maps of temperature distribution at the Precambrian surface, geothermal gradient, selected potentiometric surfaces, salinity and porosity distributions, and strike and dip cross-sections showing hydro-stratigraphic geometry and flow pattern. The hydrochemical and hydraulic properties of the hydrostratigraphic units are summarized in terms of tables of characteristic parameters (permeability, porosity, formation water chemistry). Certain detected regional-scale trends are interpreted in terms of possible depositional and/or diagenetic phenomena.
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ACKNOWLEDGMENTS AND ASSOCIATED FOOTNOTES
1 Alberta Geological Survey, Edmonton T6H 5X2
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