Lecture_1_intro.pdf - Geological Modeling Introduction Dr...

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Geological Modeling: Introduction Dr. Irina Overeem Community Surface Dynamics Modeling System University of Colorado at Boulder September 2008
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2 Course Objective Geoscientists find resources by assessing the characteristics and constraints of the earth subsurface. The subsurface has been formed over millions of years, and by the interaction of a host of sedimentary processes and time-varying boundary conditions like climate, sea level and tectonics. This course aims at exploring Geological Modeling techniques as: Learning tools to disentangle complex interactions of sedimentary systems and time-varying boundary conditions. Quantitative tools to create 3D geological models of the subsurface, including properties like grain size, porosity and permeability. A means to quantify uncertainties in the subsurface models.
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3 Course outline 1 Lectures by Irina Overeem: Introduction and overview Deterministic and geometric models Sedimentary process models I Sedimentary process models II Uncertainty in modeling Lecture by Overeem & Teyukhina: Synthetic migrated data
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4 Geological Modeling Primary objective of geological characterization is concerned with predicting the spatial variation of geological variables . Variable Any property of the geological subsurface that exhibits spatial variability and can be measured in terms of real numerical values. Spatial Variation Typically the subsurface is anisotropic, spatially complex and sedimentary bodies are internally heterogeneous.
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5 Geological Modeling > Reservoir Architecture Modeling Construction (e.g. Westerscheldt tunnel) Groundwater flow models for drinkwater and irrigation Mapping of ore deposits, or gravel & sand mining Mapping for mine burial, naval warfare…
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6 Contaminant transport at Gardermoen Airport, NO Assess risk for contaminant transport need a subsurface flow model pebbly sand silty sand coarse sand Hydraulic conductivities vary within topset, foreset, and bottomset sedimentary layers.
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