Development of a Technique for Extracting Three-Dim ensional Facies Bodies(Geobody)Based on Seismic Data and Routine Analysis for Geological and Hydrodynamic Simulation of the Terrigenous Formation PK1-3 of the East Messoyakhskoye Field

摘要

In order to reduce the uncertainty in the location of facies zones,the"geobody"technique was applied:three-dimensional bodies associated with highly permeable reservoirs were substracted based on the acoustic impedance cube.Several cycles of constructing a geological and hydrodynamic model have been carried out with the identification of problem areas in hydrodynamics and their further consideration in the geological model.After obtaining the final version of geobodies distribution,it was possible to derive permeability-effective porosity dependences for each facies zone.The use of the"geobody"methodology made it possible to clarify the facies zones,which positively affected interference history matching of production and injection wells and allowed to identify wells that penetrate sand lenses,which positively affected the predictive ability of the model.The developed methodology made it possible to increase the verification of the geological model during history matching,lower basic uncertainties,such as the location of shale barriers and underforecasting of reservoir properties,which helped to increase the predictive ability of the model for optimal well planning.