Using fuzzy logic for modeling aquifer architecture |
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| Authors: | D M Allen N Schuurman Q Zhang |
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| Institution: | (1) Department of Earth Sciences, Simon Fraser University, Burnaby, BC, Canada, V5A 1S6;(2) Department of Geography, Simon Fraser University, Burnaby, BC, Canada, V5A 1S6 |
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| Abstract: | Modeling the geologic architecture of an aquifer and visualizing its three-dimensional structure require lithologic data recorded
during well drilling. Uncertainties in layer boundaries arise due to questionable quality of drilling records, mixing during
the drilling process, which results in blurred contacts, and natural heterogeneity of the geologic materials. An approach
for modeling and visualizing the spatial distribution of aquifer units three-dimensionally based on fuzzy set theory is developed.
An indicator is defined for evaluating the possibility of aquifer existence based on fuzzy set theory and probability principles.
A specific interpolation method for aquifer 3D spatial distribution requiring only very basic borehole log data is proposed.
A 3D modeling and visualization system for aquifers is also developed, which can implement basic GIS functions, like borehole
identification and cross-section creation. The methodology developed is tested using real borehole lithology data available
for an aquifer in British Columbia, Canada.
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