TY - THES

T1 - "Rock Physics Template"- Application on different rocks and different scales

AU - Pupos, Judit

N1 - embargoed until 22-09-2019

PY - 2014

Y1 - 2014

N2 - The Rock Physics Template (RPT), which is a cross plot of acoustic impedance versus ratio of compressional and shear wave velocity, is used as a tool for efficient lithology- and pore fluid interpretation of well log data and elastic inversion results. In this were investigated (a) results of laboratory measurements at dolomite, limestone and sandstone samples from the Vienna Basin and (b) processed data in well-log and seismic scales. Different model calculations, such as Kuster and Toksöz inclusion model, Hashin-Shtrikman bounds and Gassmann fluid substitution model, for dry and brine saturated samples were carried out to achieve a better understanding about the elastic properties of the investigated rocks. It was observed that the calculated model lines describe our data set similarly in scale of laboratory measurements and well-logs. Using laboratory results and interpreted well logs, RPTs, which include the geological constraints of the Vienna Basin, were created for sandstone and carbonate rocks. Simultaneous AVO inversion was performed that delivers absolute acoustic impedance, Vp/Vs (or shear impedance) and density cubes. The elastic inversion results were also used to verify the validity of the generated RPTs. It could be considered that generation of RPTs for siliciclastic system provides a better result than for carbonate system. Possible explanations can be the low porosity, a more complex pore system of the carbonates and influences of the mineral matrix.

AB - The Rock Physics Template (RPT), which is a cross plot of acoustic impedance versus ratio of compressional and shear wave velocity, is used as a tool for efficient lithology- and pore fluid interpretation of well log data and elastic inversion results. In this were investigated (a) results of laboratory measurements at dolomite, limestone and sandstone samples from the Vienna Basin and (b) processed data in well-log and seismic scales. Different model calculations, such as Kuster and Toksöz inclusion model, Hashin-Shtrikman bounds and Gassmann fluid substitution model, for dry and brine saturated samples were carried out to achieve a better understanding about the elastic properties of the investigated rocks. It was observed that the calculated model lines describe our data set similarly in scale of laboratory measurements and well-logs. Using laboratory results and interpreted well logs, RPTs, which include the geological constraints of the Vienna Basin, were created for sandstone and carbonate rocks. Simultaneous AVO inversion was performed that delivers absolute acoustic impedance, Vp/Vs (or shear impedance) and density cubes. The elastic inversion results were also used to verify the validity of the generated RPTs. It could be considered that generation of RPTs for siliciclastic system provides a better result than for carbonate system. Possible explanations can be the low porosity, a more complex pore system of the carbonates and influences of the mineral matrix.

KW - Rock Physics Template

KW - Modell-Rechnungen

KW - Karbonaten

KW - Rock Physics Template

KW - Model Calculations

KW - Carbonates

M3 - Master's Thesis

ER -