Geostatistical borehole image-based mapping of karst-carbonate aquifer pores

Groundwater
By:  and 

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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.

Additional publication details

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