2008•21st EEGS Symposium on the Application of Geophysics to Engineering and Environmental ProblemsRequires access
A 3D Seismic Survey For Shallow Aquifer Mapping
Don Caleb Lawton, Robert R. Stewart, Malcolm B. Bertram
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Abstract
A high-resolution 3D seismic survey was undertaken to map shallow aquifers near Calgary, Alberta. The survey was 500m x 300m in area, with shot and receiver lines in an orthogonal geometry using 50m line separation. Shots and geophones were spaced at 10m intervals along source and receiver lines, respectively. The surface source used was an 18,000lb EnviroVibe sweeping over a 10Hz to 180Hz range. The survey yielded excellent reflections with a dominant frequency of 50Hz. One high-amplitude west-dipping reflection, occurring between depths of 250m and 450 m, was mapped over the survey area. The event is correlative to a Tertiary sandstone which may be a regional aquifer.