Construction of offshore exploration wells in harsh pressure and temperature environment involves a high risk of geological complications. This is particularly relevant for exploration operations in insufficiently explored areas where the well design is based on seismic data, while the nearest drilled wells are at a considerable distance and do not reflect the specific geological conditions at the point of the new target. This paper presents a comprehensive approach to the detailed study of the geological structure of the Caspian shelf exploration area by processing 3D seismic data for the purpose of forecasting and monitoring hydraulic fracturing pressure and pore pressure prior to construction and during well drilling. Optimized algorithm of data processing in a 7×7 km near-wellbore seismic volume, including detailed tomographic analysis using the Seismic Guided drilling (SGD) method, real-time updating of the geomechanical model, updating of the structural framework and forecasting of properties allows to effectively reduce risks during well construction. Taking into account the experience of geological complications during drilling through Neogene and Quaternary sediments in North Caspian it is also shows the application and integration of geotechnical engineering survey data to refine the upper section model.
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