Advanced Geosteering using Data Integration on XRF/XRD, Gas Analysis and LWD data to Optimize Well Placement

Summary Middle Marrat is a primary Jurassic tight carbonate reservoir with enhanced porosities granted by crystalline dolomites and homogeneous gamma/resistivity response, which means geosteering with traditional LWD methods in this formation is a challenge; a new approach is necessary in this case. Detailed geochemical characterization using XRF/XRD analysis from cuttings, advanced gas analysis (C1-C8), and LWD logs are all integrated in real-time using StarSteer, a powerful software solution which allows visualizing, interpret and integrate all the geosteering techniques (Model-Based, Strat-Based, Multi-well and Multi-log) in one window simultaneously. Using this method, it was possible to land, navigate, and reach well TD safely along 965 ft of horizontal section with 97% inside the objective, giving the client better information to make decisions in real-time and save costs avoiding incurring in additional delays.