Title: The Relationship Between Acoustic Properties and the Petrographic Character of Carbonate Rocks
Abstract: The relationship between acoustic properties and the petrographic character of carbonate rocks Laboratory studies of the detailed relationships between acoustic properties and the petrographic character of brine-and air-saturated carbonate rocks with a wide range of facies, porosities, lithologies, and rock fabrics indicate that porosity is the major factor influencing both P- and S-wave impedance and velocity. Primary lithology and secondary mineralogy have only a small influence on impedance and velocity. Combined use of P-and S-wave velocity data discriminates porosity changes from lithologic changes. All other variables, including pore-fluid type and petrographic fabric, have no significant influence on velocities. Laboratory measurements of P-wave velocity under simulated in-situ conditions reproduce well-log velocity values reliably. Laboratory porosity-velocity trends agree with the time-average equation when the correct matrix velocities are used. Rock property results were used to interpret porosity/lithology variations for an inverted seismic section from the Williston basin. Where well control was available, the porosity/lithology interpretation was found to be in agreement with the subsurface control.
Publication Year: 1984
Publication Date: 1984-09-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 5
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