Calibration of NMR well logs from carbonate reservoirs with laboratory NMR measurements and μXRCT

Journal Article · Wed Jan 01 00:00:00 EST 2014 · Energy Procedia (Online)

DOI:https://doi.org/10.1016/j.egypro.2014.11.332· OSTI ID:1829190

Mason, Harris E.; Smith, Megan M.; Hao, Yue; Carroll, Susan A.

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.

• Research Organization: Idaho National Laboratory (INL), Idaho Falls, ID (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC52-07NA27344
• OSTI ID: 1829190
• Alternate ID(s): OSTI ID: 1201504
• Journal Information: Energy Procedia (Online), Journal Name: Energy Procedia (Online) Vol. 63 Journal Issue: C; ISSN 1876-6102
• Publisher: Elsevier
• Country of Publication: Netherlands
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
58 GEOSCIENCES
NMR
μXRCT
well logging