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The AAPG/Datapages Combined Publications Database
West Texas Geological Society
Abstract
Porosity Quantification in Vuggy Carbonate Reservoirs
Abstract
Vugs, which are large irregular pores, are a key pore type in many carbonate reservoirs. Conventional logging tools, such as neutron logs, commonly average high values of vuggy porosity with low values of matrix porosity to compute low total porosity readings. When total porosity falls below arbitrary commercial cutoffs, operators may leave bypassed pay behind pipe. The purpose of this study is to quantify vuggy porosity using digital images of core, and to use core results to calibrate vuggy porosity pixel counts obtained from borehole images. The improved porosity analysis that results from this approach compares to the well-known improvement in thin-bed, “low-resistivity pay” analysis provided by borehole images.
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