[First Hit]

2018 AAPG International Conference and Exhibition

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Complementary Previous HitStructuralNext Hit Analysis of Channelized Turbidites in the Offshore Niger Delta: Integration of Previous Hit3-DNext Hit Previous HitSeismicNext Hit Previous HitDataNext Hit, Previous HitInversionNext Hit of Extra-Deep Azimuthal Resistivity Previous HitDataNext Hit, Gamma and Density Borehole Images


Integration of subsurface geological and petrophysical Previous HitdataNext Hit is necessary for a robust Previous HitstructuralNext Hit interpretation. Complementary Previous HitstructuralNext Hit analysis is a comparative procedure that involves pairing Previous HitstructuralNext Hit interpretations Previous HitfromNext Hit two or more sources for improved understanding of subsurface structures. The pairing increases the robustness of any Previous HitstructuralNext Hit analysis by providing the geological (type of depositional environment, temporal and spatial considerations) or any other measurement (e.g. tool type, depth of investigation) explanation to support the outcome. In oil field management, Previous HitstructuralNext Hit analysis of the reservoir provides invaluable information on subsurface Previous HitstructuralNext Hit features (faults, fractures) and reservoir parameters that may impact oil drainage. In this study, a complementary Previous HitstructuralNext Hit analysis scheme was Previous HitappliedNext Hit to a Mid- to Late Miocene channelized reservoir in the Niger Delta area. The reservoir consists of several individual turbidite complexes including stacked channels and extensive, lobate sheet sands. Multiple faults, multi-layered, heterogeneous and discontinuous sand bodies are some of the peculiarities of the reservoir and which required characterization for optimum drainage strategy and field management. This case study shows an integrated Previous HitstructuralNext Hit interpretation Previous HitfromNext Hit dip measurements derived Previous HitfromNext Hit Previous HitinversionNext Hit of extra-deep azimuthal resistivity Previous HitdataNext Hit, gamma and density images, and 3D Previous HitseismicNext Hit. This has allowed for a better visualization of the near-wellbore Previous HitstructuralNext Hit geology of the wells drilled in the study area, detection of subsurface Previous HitstructuralNext Hit features, discontinuities, and the robust determination of key reservoir parameters (reservoir thickness, geometry) of the drilled channelized sand bodies. Our approach also underscored the importance of complementary Previous HitstructuralTop analysis in the characterization of channelized turbidites during oil field management.