Regional fracture network permeability using outcrop scale measurements

摘要: Estimating the hydraulic properties of fractured aquifers is challenging due to complexity structural discontinuities that can generally be measured at a small scale, either in core or outcrop, but influence groundwater flow over range scales. This modeling study uses fracture scanline data obtained from surface bedrock exposures derive estimates permeability used represent rock matrix within regional scale models. The model developed using PETREL, which traditionally benefits high resolution sets during oil and gas exploration, including for example seismic data, borehole logging (both lithological geophysical). technique consists interpreting these generate representative Discrete Fracture Network (DFN) models each field set. DFN are then upscaled provide an effective conductivity tensor represents matrix. For site, conductivities compared with derived pumping tests validate model. A generated region captures spatial variability networks pseudo-three dimensions data. Hydraulic estimated this approach compare well those test results suggest such may feasible taking upscaling aquifer needed modeling.