Improving Reservoir Characterization of Jurassic Tight Carbonate Gas Fields with Upgraded High-Resolution LWD Imaging

Summary Conventional wireline logging in highly deviated or horizontal wells within these long produced, depleted formations is particularly problematic. Drilling and logging in deep, high temperature, high pressure (HTHP) depleted reservoirs frequently encounter wellbore instability, differential sticking, and mud loss; extensive pressure depletion from prolonged production has further increased drilling complexity and non productive time (NPT). Consequently, viable alternative logging solutions are required when traditional wireline methods prove ineffective. The upgraded High Resolution LWD Imaging service provides comprehensive 360-degree borehole coverage in a small hole, capturing images with 256 data samples per depth. This extensive data collection facilitates the identification of critical formations features, including fractures vital for effective reservoir management. Furthermore, this technology can be integrated with the Density Imaging service, offering complementary information that enhances interpretation and decision-making processes. The upgraded Ultra Sonic imaging service in this tool addresses issues related to heterogeneity, flow barriers, diagenesis, and secondary porosity identification. Geomechanical evaluations involve assessing in-situ stress features, identifying types and causes of induced fractures, and analyzing occurrences of borehole breakout The deployment of the upgraded High Resolution LWD Imaging tool at KOC demonstrates technological advancement and sets a new standard for operations in complex drilling environments.