Application of binomial-edited CPMG to shale characterization.

Autor: Washburn KE; Ingrain, Inc., 3733 Westheimer Road, Houston, TX 77027, United States. Electronic address: washburn@ingrainrocks.com., Birdwell JE; U.S. Geological Survey, Denver Federal Center, Box 25046 MS 977, Denver, CO 80225, United States.
Jazyk: angličtina
Zdroj: Journal of magnetic resonance (San Diego, Calif. : 1997) [J Magn Reson] 2014 Sep; Vol. 246, pp. 72-8. Date of Electronic Publication: 2014 Jun 28.
DOI: 10.1016/j.jmr.2014.06.014
Abstrakt: 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.
(Copyright © 2014 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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