The effects of burial diagenesis on multiscale porosity in the St. Peter Sandstone: An imaging, small-angle, and ultra-small-angle neutron scattering analysis
Journal Article
·
· Marine and Petroleum Geology
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Illinois, Champaign, IL (United States); Ernst-Moritz-Arndt-Univ., Greifswald (Germany)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
- Forschungszentrum Julich GmbH, Garching (Germany)
- Argonne National Lab. (ANL), Argonne, IL (United States)
To examine the effects of burial diagenesis on heirarchical pore structures in sandstone and compare those with the effects of overgrowth formation, we obtained samples of St. Peter Sandstone from drill cores obtained in the Illinois and Michigan Basins. The multiscale pore structure of rocks in sedimentary reservoirs and the mineralogy associated with those pores are critical factors for estimating reservoir properties, including fluid mass in place, permeability, and capillary pressures, as well as geochemical interactions between the rock and the fluid. The combination of small- and ultra-small-angle neutron scattering with backscattered electron or X ray-computed tomographic imaging, or both, provided a means by which pore structures were quantified at scales ranging from aproximately 1 nm to 1 cm—seven orders of magnitude. Larger scale (>10 µm) porosity showed the expected logarithmic decrease in porosity with depth, although there was significant variation in each sample group. However, small- and ultra-small-angle neutron scattering data showed that the proportion of small-scale porosity increased with depth. Porosity distributions were not continuous, but consisted of a series of log normal-like distributions at several distinct scales within these rocks. Fractal dimensions at larger scales decreased (surfaces smoothed) with increasing depth, and those at smaller scales increased (surfaces roughened) and pores become more isolated (higher lacunarity). Furthermore, data suggest that changes in pore-size distributions are controlled by both physical (compaction) and chemical effects (precipitation, cementation, dissolution).
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
- Sponsoring Organization:
- National Institute of Standards and Technology (NIST); National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
- Grant/Contract Number:
- AC02-06CH11357; AC05-00OR22725
- OSTI ID:
- 1435954
- Alternate ID(s):
- OSTI ID: 1545184
OSTI ID: 1775253
- Journal Information:
- Marine and Petroleum Geology, Journal Name: Marine and Petroleum Geology Journal Issue: C Vol. 92; ISSN 0264-8172
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
| University of Illinois Campus Deep Direct-Use Feasibility Study - Porosity and Permeability of Rock Formations | dataset | April 2018 |
Multifractal Characteristics of MIP-Based Pore Size Distribution of 3D-Printed Powder-Based Rocks: A Study of Post-Processing Effect
|
journal | September 2018 |
Similar Records
Digenetic Changes in Macro- to Nano-Scale Porosity in the St. Peter Sandstone:L An (Ultra) Small Angle Neutron Scattering and Backscattered Electron Imagining Analysis
The effects of cycling an air-water interface in St. Peter sandstone
Journal Article
·
Mon Dec 31 23:00:00 EST 2012
· Geochimica et Cosmochimica Acta
·
OSTI ID:1074420
The effects of cycling an air-water interface in St. Peter sandstone
Journal Article
·
Mon Oct 31 23:00:00 EST 1983
· J. Energy; (United States)
·
OSTI ID:6621026