Accurate characterization of geological formations and structures is essential for effective well planning, optimal well placement, and informed investment in field development. However, current technologies are limited by the type of drilling fluid and hole size; moreover, their deployment at a distance from the bit overlooks some effects such as damaged boreholes. The time lapse between rock removal by the PDC bit and the subsequent passage of logging-while-drilling (LWD) or wireline logging tools can lead to significant enlargements, washouts, and loss of data. To tackle these challenges, the newly developed Retina at-bit imaging system was put to the test in Oklahoma.
The Retina system offered unparalleled insights into formation geology and rock properties at the site. Using a recording system that integrates sensors into a PDC drill bit to capture force measurements at the bit level, the Retina system collected detailed information about the geology, including bedding dips, fractures, facies, and textures.
It is the only tool that works with any fluid composition, collecting vital data while drilling without changes to operations, extra runs, or additional tools in the BHA. As a result, the Retina system surpasses the limitations of other technologies, enhancing well planning and field development.
