Extending NMR data for permeability estimation in fine-grained sediments

摘要: Abstract We combine nuclear magnetic resonance (NMR) transverse relaxation time data and gamma ray to estimate lithology-dependent permeability in silt- clay-rich sediments. This approach extends the utility of Schlumberger-Doll Research (SDR) equation from reservoirs aquicludes seals, thus improves value robustness NMR data. Data Keathley Canyon, northern Gulf Mexico show that can be used define 10 −18 −14  m 2 (0.001–10 millidarcies) as calibrated tested by direct measurements on core samples. performed uniaxial, constant rate-of-strain consolidation experiments sediments Canyon determine core-scale permeability. Permeabilities these were compared permeabilities calculated logging-while-drilling A better fit between log-derived laboratory-measured was obtained using SDR with a variable coefficient , rather than is typically used. how function lithology modeled The relationship values suggests variations are caused platy clay minerals effect they have pore system. Our results provide improved means for estimation application basin flow modeling, hydrocarbon migration well completion design.