Measurements and modelling of the elastic properties of artificial shales
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Elastic properties of shales and their anisotropy are important for seismic imaging, seismic to well tie and borehole stability issues. These properties are mainly formed due to the mechanical compaction and are influenced by the various factors, namely mineral composition of initial sediment, pore fluid chemistry, stress conditions, etc. In this experimental work, we study the effects of mechanical compaction on the elastic properties of shales with aggregated clay microstructure and different concentration of silt inclusions. We found that elastic properties of clay matrix can be considered independent of the concentration of quartz inclusions when the latter is low. However, the high concentration of quartz inclusions perturbs the orientation distribution function of clay platelets that changes elastic properties of clay.
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Prediction of sonic velocities in shale from porosity and clay fraction obtained from logs - A North Sea well case studyPervukhina, Marina; Golodoniuc, P.; Gurevich, Boris; Clennell, M.; Dewhurst, D.; Nordgård-Bolås, H. (2014)Prediction of sonic velocities in shales from well logs is important for seismic to log ties if the sonic log is absent for a shaly section, for pore pressure anomaly detection, and for data quality control. An anisotropic ...
An estimation of sonic velocities in shale using clay and silt fractions from the elemental capture spectroscopy logPervukhina, M.; Golodoniuc, Pavel; Gurevich, Boris; Clennell, M.; Nadri, D.; Dewhurst, D.; Nordgard Bolas, H. (2012)Anisotropic differential effective medium approach is used to simulate elastic properties of shales from elastic properties and volume fractions of clay and silt constituents. Anisotropic elastic coefficients of the wet ...
Compaction of quartz-kaolinite mixtures: The influence of the pore fluid composition on the development of their microstructure and elastic anisotropyBeloborodov, R.; Pervukhina, M.; Luzin, V.; Delle Piane, C.; Clennell, M.; Zandi, S.; Lebedev, Maxim (2016)Shales play important roles in sedimentary basins, acting as both seals and reservoir rocks, and knowledge of their anisotropic velocity trends is of practical importance for correct seismic image processing and inversion, ...