Geostatistical borehole image-based mapping of karst-carbonate aquifer pores
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Abstract
Quantification of the character and spatial distribution of porosity in carbonate aquifers is important as input into computer models used in the calculation of intrinsic permeability and for next-generation, high-resolution groundwater flow simulations. Digital, optical, borehole-wall image data from three closely spaced boreholes in the karst-carbonate Biscayne aquifer in southeastern Florida are used in geostatistical experiments to assess the capabilities of various methods to create realistic two-dimensional models of vuggy megaporosity and matrix-porosity distribution in the limestone that composes the aquifer. When the borehole image data alone were used as the model training image, multiple-point geostatistics failed to detect the known spatial autocorrelation of vuggy megaporosity and matrix porosity among the three boreholes, which were only 10 m apart. Variogram analysis and subsequent Gaussian simulation produced results that showed a realistic conceptualization of horizontal continuity of strata dominated by vuggy megaporosity and matrix porosity among the three boreholes.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Geostatistical borehole image-based mapping of karst-carbonate aquifer pores |
| Series title | Groundwater |
| DOI | 10.1111/gwat.12354 |
| Volume | 54 |
| Issue | 2 |
| Year Published | 2016 |
| Language | English |
| Publisher | National Ground Water Association |
| Publisher location | Worthington, OH |
| Contributing office(s) | FLWSC-Ft. Lauderdale |
| Description | 12 p. |
| First page | 202 |
| Last page | 213 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |