TY  - JOUR
AU  - Rezaeyan, Amirsaman
AU  - Kampman, Niko
AU  - Pipich, Vitaliy
AU  - Barnsley, Lester C.
AU  - Rother, Gernot
AU  - Magill, Clayton
AU  - Ma, Jingsheng
AU  - Busch, Andreas
TI  - Compaction and clay content control mudrock porosity
JO  - Energy
VL  - 289
SN  - 0360-5442
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2024-00774
SP  - 129966 -
PY  - 2024
AB  - Mudrocks, ubiquitous yet poorly understood sedimentary rocks with significant variations in composition and physical properties, form seals for geological carbon dioxide and energy (e.g., hydrogen and methane) storage, repositories for radioactive waste disposal, and reservoirs for natural gas. Understanding the controls on mudrock pore structure is essential for evaluating their porosity. The identification and quantification of controls depend on the nano-to micron scale pore network, which are the subject of this study. Small-angle (SANS) and very small-angle neutron scattering (VSANS) experiments were conducted on 13 diverse mudrock sets, charac-terised by differences in mineralogy, stratigraphy, maturity, and depositional environment. We performed multivariate statistics to systematically characterise the pore structure in 71 samples cross a 5 μm–2 nm pore size range. Our results indicate a multivariate approach more effectively captures the complex controls on porosity rather than single parameters. Compaction and clay content emerge as key primary and secondary controls on mudrock porosity, respectively, upon which we introduce a new porosity classification. Our complementary experimental-statistical assessment involving SANS-derived multiscale porosity sheds new light on the influence of structural controls on storage or production capacity in mudrocks.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001138055200001
DO  - DOI:10.1016/j.energy.2023.129966
UR  - https://juser.fz-juelich.de/record/1021481
ER  -