COLOG collected high resolution borehole imaging data using Optical and Acoustic Televiewer probes in twenty-five boreholes. These images, oriented for tilt and azimuth, were utilized to determine the depth and direction of major and minor fractures. Fractures were then identified across multiple boreholes to assist in the mapping of underground structures and formations.
Also employing Electric Resistivity, Three-Receiver Sonic, and Formation Density probes to determine formation porosity and bulk matrix density, additional data was analyzed to identify formation lithology and correlate depths to known geologic formations. Colog logging crews were on-call 24/7 and able to meet drill rigs as they finished each borehole, minimizing the time the hole was open and reducing the chance a hole would collapse before data acquisition.
Recording data in sections by running the probes through the partially removed drill pipe to the open-hole section below, COLOG was also able to record critical borehole data in otherwise unstable boreholes.
