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Application of binomial-edited CPMG to shale characterization

Journal of Magnetic Resonance

By:
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DOI: 10.1016/j.jmr.2014.06.014

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Abstract

Unconventional shale resources may contain a significant amount of hydrogen in organic solids such as kerogen, but it is not possible to directly detect these solids with many NMR systems. Binomial-edited pulse sequences capitalize on magnetization transfer between solids, semi-solids, and liquids to provide an indirect method of detecting solid organic materials in shales. When the organic solids can be directly measured, binomial-editing helps distinguish between different phases. We applied a binomial-edited CPMG pulse sequence to a range of natural and experimentally-altered shale samples. The most substantial signal loss is seen in shales rich in organic solids while fluids associated with inorganic pores seem essentially unaffected. This suggests that binomial-editing is a potential method for determining fluid locations, solid organic content, and kerogen–bitumen discrimination.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Application of binomial-edited CPMG to shale characterization
Series title:
Journal of Magnetic Resonance
DOI:
10.1016/j.jmr.2014.06.014
Volume
246
Year Published:
2014
Language:
English
Publisher:
Elsevier
Contributing office(s):
Central Energy Resources Science Center
Description:
7 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Magnetic Resonance
First page:
72
Last page:
78
Number of Pages:
7