3D Petrophysics (Hawe) for Geosteering and Geological Tasks

Basic well logs interpretation is done based on radial model, which was initially developed and proved its reliability in vertical wells. Applying of this approach for high angle wells may cause false results. Because tool measurements are influenced by formations at the distance with different properties. All this above adds the complexity into petrophysical interpretation - true formation properties evaluation. The new approach for HAWE is 3D petrophysics. This approach include detailed petrophysical and geological modelling using multiscale information: borehole images, well logs, geosteering and seismic data. This work explains the methodology of loggig-while-drilling data interpretation in three-dimensional space. The results of several wells interpretation are compared with standard approach (coaxial - cylinder model) and with 3D. The difference in formation properties and NTG are shown for both methods with the recommendation of 3D approach.