High-resolution images of shallow aquifers - A challenge in near-surface seismology

Roberto G. Francese, Z. Hajnal, Arnfinn Prugger

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A near-surface multifold high-resolution seismic reflection experiment was conducted in the vicinity of the waste management area of a potash mine in western Canada. A buried channel was identified in the data, and the stratigraphy of the Quaternary infill of this structure was mapped. The spatial extent os several prominent gravel-sandy aquifers, which represent the hydrogeologic framework of the region, was outlined by the survey. The seismic signatures also established the hydraulic independence of three major aquifers along the survey line. The complex heterogenous lithology of the surface cover limited effective elastic-wave generation to surface sorces. This geologic framework also caused propagation of strong diverse coherent-noise patterns which severely degraded reflected signal. The suppression of those overwhelming intefering events required the design of noise-specific filters and their sequential multistep implementations.Results of forward modeling of background geological information were crucial factors in the design of the data acquisition program and preliminary choices of the processing parameters, and (along with borehole data) were the primary guidance in the geologic interpretation of the final seismic section. Fundamental procedures were developed for mapping of glacial tills in the Western Canadian Basin, techniques that can be applied in other regions with similar nearsurface glacial stratigraphy. The experiment revealed that even closely spaced borehole information could never duplicate the detail of the subsurface images of the seismic data.

Original languageEnglish
Pages (from-to)177-187
Number of pages11
JournalGeophysics
Volume67
Issue number1
Publication statusPublished - Jan 2002

Fingerprint

Seismology
seismology
aquifers
image resolution
Image resolution
Aquifers
Stratigraphy
stratigraphy
aquifer
boreholes
Boreholes
high resolution
Potash mines
borehole
waste management
gravels
wave generation
Lithology
potash
Elastic waves

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

High-resolution images of shallow aquifers - A challenge in near-surface seismology. / Francese, Roberto G.; Hajnal, Z.; Prugger, Arnfinn.

In: Geophysics, Vol. 67, No. 1, 01.2002, p. 177-187.

Research output: Contribution to journalArticle

Francese, Roberto G. ; Hajnal, Z. ; Prugger, Arnfinn. / High-resolution images of shallow aquifers - A challenge in near-surface seismology. In: Geophysics. 2002 ; Vol. 67, No. 1. pp. 177-187.
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