Chevron Petrophysical Imaging Laboratory

Toshiba Aquillon RXL CT Scanner

CaptureThe Toshiba Aquilion RXL CT Scanner is located in the Chevron Petrophysical Imaging Laboratory. It is a state of the art scanner with a 72 cm gantry opening that allows +/- 30 degrees tilt, 16-detector row 32 slice CT system that delivers high speed iterative image reconstruction of 0.5 mm data sets at up to 16 images per second, industry leading low contrast resolution of 2mm at 0.3%, and an advanced 3D visualization software package. These features enable the scanner to deliver uniform image quality with isotropic resolution as fine as 350 micron.

The CT scanner was donated by Chevron Corporation and represents a great asset for the Harold Vance Department of petroleum Engineering. This device is used to visualize properties and features of conventional and unconventional rock samples such as porosity, permeability distribution estimation, heterogeneities, direction of bedding planes, and natural fractures in great detail. Our graduate and undergraduate students have been utilizing the scanner to visualize many core phenomena that are otherwise undetectable by standard practices during conventional and unconventional enhanced oil recovery experiments including but not limited to CO2, gas, surfactant and water flooding. The students have been able to track core flood fronts, observe flow profiling, and measure fluid densities and changes in saturation within core samples in real time. In addition, the CT scanner has been used to study and evaluate wormhole propagation in cores exposed to acid treatments. Other potential uses of the scanner include study of imbibition, scale detection, mud invasion, formation and removal of filter cakes, measurement of diffusion coefficients of ions in water saturated rocks and clays, correlation of cores with well logs, characterization of core material, and core sample quality control.