Fractured Reservoir Characterization: From Diagenesis and Fracture Mechanics to Reservoir Permeability
This talk describes how core-based diagenetic observations and mechanical properties measurements can be used to constrain natural fracture network geometry and flow properties in clastic rocks. A methodology is described that starts with optical microscopy and SEM-based cathode luminescence, relating pore-space diagenesis to fracture-filling cements.
Geomechanical modeling of fracture pattern development and opening rate is constrained by anisotropic strain boundary conditions, mechanical layer thickness, and core-based fracture mechanics property measurements. Permeability calculations are made on a wide variety of fracture pattern geometries, including the effects of fracture pattern connectivity, heterogeneous aperture distributions, and the degree of aperture occlusion by mineralization. It is demonstrated that fractured rock permeability assessment can be improved with quantifiable geologic fracture attributes.
