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- W4386495172 abstract "ABSTRACT MicroCT imaging is performed before and after confined compression testing on a minicore of Boise sandstone in order to extract quantitative information regarding the microstructural controls on compaction initiation and distribution, with the ultimate goal of formulating compressibility predictions at in situ conditions. In contrast with traditional compaction studies, our analysis focuses on local statistics among regions of a given sample as opposed to global statistics in a sample set. The original workflow includes a segmentation strategy and the definition of a series of metrics that are evaluated throughout the entire image volumes before and after testing. The results suggest that local porosity and sorting are the main controls on local strength, whereas neighborhoods with larger mean grain size do not appear to be more prone to yielding. This is consistent with previous findings on confined comminution which emphasize the tendency of grain size distributions to become self-similar through the elimination of same size neighbors at all scales. INTRODUCTION The limited ability to predict the onset and development of compaction at the pore scale in high porosity reservoir rocks undergoing depletion represents a substantial barrier to the optimization of appraisal and production planning. Compaction may be potentially beneficial as a pressure support mechanism but can also be a hindrance to overall flow properties through reservoir compartmentalization and fines production/migration. This topic has been the focus of many studies both within industry and academia (Fatt, 1958; Zhang et al., 1990a; Schutjens et al., 1998; Wong and Baud, 1999; Olsson et al., 2002). Beyond conventional reservoir operations, better understanding of the mechanical behavior of confined granular aggregates is of interest in many other subsurface applications from 4D seismic interpretation to storage and subsidence, but also across industries in environmental and civil engineering domains. As a powerful extension of traditional microscopy work, non-destructive X-ray CT imaging has been enabling investigations that were not previously possible. An example is the in-situ monitoring of 3D microstructural changes occurring in materials under active loading, with the continuous introduction of ever more sophisticated setups (e.g. Renard et al., 2016; Voltolini et al., 2019; Shahin et al., 2022; Francois et al., 2022)." @default.
- W4386495172 created "2023-09-07" @default.
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- W4386495172 date "2023-06-25" @default.
- W4386495172 modified "2023-10-16" @default.
- W4386495172 title "Influence of Local Grain Size Distribution on Damage Development in X-Ray CT Images of Boise Sandstone Deformed by Confined Compression" @default.
- W4386495172 doi "https://doi.org/10.56952/arma-2023-0690" @default.
- W4386495172 hasPublicationYear "2023" @default.
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