Two sets of acoustic data on carbonates were combined to span the porosity interval from below 5% to more than 75%: dolomite and limestone of Paleozoic age from Estonia and mixed sediments from the Caribbean. The carbonate content of the samples ranges from less than 50% to 100%, and it was attempted to find a "clay effect", by establishing linear trends between porosity and acoustic travel time for intervals defined on the basis of carbonate content, magnetic susceptibility, and (for the Caribbean samples) natural gamma radiation. A "clay effect", defined as a high acoustic traveltime relative to porosity, was found in the porosity interval 10%-30%. Outside this interval the effect was not obvious.
|Title of host publication||Nordic Petroleum Technology Series: IV|
|Place of Publication||Ås|
|Publication status||Published - 1998|
Lind, I., & Shogenova, A. (1998). Acoustic Velocity Data for Clay Bearing Carbonate Rocks: from the Paleozoic Deposits of Estonia and the Cenozoic and Mesozoic Deposits of the Caribbean Sea. In Nordic Petroleum Technology Series: IV (pp. 111-123). Nordisk Energiforskningsprogram.