A multi-scale geostatistical method of evaluating the elastic properties of rock from digital core
MetadataShow full item record
© 2018 EAGE. Estimations of the elastic properties of a core sample are extremely sensitive to the quality of the CT-scan image. A coarse image resolution does not allow separating the grains and estimating their roughness. The size of images with fine resolution is either below representative volume or so representatively large that require huge computational resources for the numerical simulation of static loading tests. We present a new multi-scale numerical methodology that combines the geostatistics, computational topology and numerical upscaling. The essence of the approach is to estimate the distribution of the grain surface roughness, the distance between them and cement material by microscopic images (SEM), then to calculate the effective parameters of cement distribution for an equivalent model with flat contacts between grains. Finally, to use this effective cement to fill the interfaces between grains in a digital model built on CT images of medium resolution by computational topology.
Showing items related by title, author, creator and subject.
Source to sink zircon grain shape: Constraints on selective preservation and significance for Western Australian Proterozoic basin provenanceMarkwitz, V.; Kirkland, Chris (2016)The effect of selective preservation during transportation of zircon grains on the detrital age spectrum is difficult to quantify and could potentially lead to systematic bias in provenance analysis. Here we investigate ...
Effect of grain shapes in coordination number from micro-CT image analysis of an unconsolidated sandAhmed, Z.; Lebedev, Maxim; Madadi, Mahyar (2017)Coordination number (CN, average number of contacts a grain has with its neighbours inside a granular medium) appears to be one of the important parameters in contact based modelling of elastic properties including seismic ...
Grange, Marion; Nemchin, Alexander; Pidgeon, Robert; Timms, Nicholas Eric; Muhling, J.; Kennedy, Allen (2009)Lunar breccia 73217 is composed of plagioclase and pyroxene clasts originating from a single gabbronorite intrusion, mixed with a silica-rich glass interpreted to represent an impact melt. A study of accessory minerals ...