The assessment of rock drillability from elastic and petrophysical parameters

Rock strength is an essential and effective property in the rock drilling, excavation, cost evaluation. This work aims to examine a practical approach evaluate geomechanical properties that control drillability, such as uniaxial compressive (UCS) by utilising some petrophysical parameters (porosity bulk density) elastic (Young’s modulus, slowness). To achieve this aim, study was conducted on Jurassic samples were cored from different localities Gebel El-Maghara, North Sinai, Egypt. The calculated measured porosity of 28 sandstone 89 carbonate plug samples. Empirical equations relate rocks physical are represented. logging data (sonic, density, neutron, gamma-ray logs) can be utilised other future studies predict using these empirical inferred study. comparison between relationships results UCS with laboratory types sedimentary collected places around worldfrom previous shows high compatibility. estimated regression analysis more recommended than carbonate.