Comparison of empirical models for calculating the vuggy porosity and cementation exponent of carbonates from log responses, Issues 93-94
Bureau of Economic Geology, University of Texas at Austin, 1993 - Nature - 27 pages
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acoustic logs acoustic signals bypass acoustic transit Archie cementation exponents Archie equation Brie calculated by equation calculating separate-vug porosity Calculating Vuggy Porosity carbonate rocks Cementation exponents calculated connected to interparticle core data CT scan dead-end pores density logs derived from point-count dolomite effect of vuggy ﬂuid transit Formation evaluation formation factor fusulinid Gaines County I0g Pt intergranular interparticle pores intragranular microporosity isolated vugs Lucia and Conti models for calculating modified Myers model multiple pore types Nurmi model Oldham County percent permeability point-count data pore space pore volume power-law models quadratic and power-law resistivity logs sample Schematic diagram secondary porosity separate vugs separate-vug and touching-vug separate-vug porosities calculated separate-vug porosities derived shown in figure SPI model SWEC Mansfield tation exponent Texas thin sections total porosity touching vugs touching-vug carbonates us/ft versus core porosity vug porosity vuggy porosity calculated well-connected planar fractures wireline logs Wyllie time-average equation Wyllie time-average formula