Calibration of NMR well logs from carbonate reservoirs with laboratory NMR measurements and μXRCT
The use of nuclear magnetic resonance (NMR) well log data has the potential to provide in-situ porosity, pore size distributions, and permeability of target carbonate CO₂ storage reservoirs. However, these methods which have been successfully applied to sandstones have yet to be completely validated for carbonate reservoirs. Here, we have taken an approach to validate NMR measurements of carbonate rock cores with independent measurements of permeability and pore surface area to volume (S/V) distributions using differential pressure measurements and micro X-ray computed tomography (μXRCT) imaging methods, respectively. We observe that using standard methods for determining permeability from NMR data incorrectly predicts these values by orders of magnitude. However, we do observe promise that NMR measurements provide reasonable estimates of pore S/V distributions, and with further independent measurements of the carbonate rock properties that universally applicable relationships between NMR measured properties may be developed for in-situ well logging applications of carbonate reservoirs.
- Publication Date:
- OSTI Identifier:
- Accepted Manuscript
- Journal Name:
- Energy Procedia
- Additional Journal Information:
- Journal Volume: 63; Journal Issue: C; Journal ID: ISSN 1876-6102
- Research Org:
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Sponsoring Org:
- Country of Publication:
- United States
- 47 OTHER INSTRUMENTATION; 58 GEOSCIENCES; NMR; μXRCT; well logging
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