Quantitative discrimination between oil and water in drilled bore cores via Fast-Neutron Resonance Transmission Radiography.
A novel method utilizing the Fast Neutron Resonance Transmission Radiography is proposed for non-destructive, quantitative determination of the weight percentages of oil and water in cores taken from subterranean or underwater geological formations. The ability of the method to distinguish water from oil stems from the unambiguously-specific energy dependence of the neutron cross-sections for the principal elemental constituents. Monte-Carlo simulations and initial results of experimental investigations indicate that the technique may provide a rapid, accurate and non-destructive method for quantitative evaluation of core fluids in thick intact cores, including those of tight shales for which the use of conventional core analytical approaches appears to be questionable.
Weizmann Institute of Science, Rehovot 76100, Israel. Electronic address: david.vartsky@weizmann.ac.il.
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Vartsky
Herzbergstr. 20, Gründau 63584, Germany.
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Goldberg
Physikalisch-Technische Bundesanstalt (PTB), Braunschweig 38116, Germany.
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Dangendorf
Weizmann Institute of Science, Rehovot 76100, Israel; Nuclear Research Center of the Negev, P.O.Box 9001, Beer Sheva, Israel.
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Israelashvili
Soreq NRC, Yavne 81800, Israel.
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Mor
Soreq NRC, Yavne 81800, Israel.
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Bar
Physikalisch-Technische Bundesanstalt (PTB), Braunschweig 38116, Germany.
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Tittelmeier
Physikalisch-Technische Bundesanstalt (PTB), Braunschweig 38116, Germany.
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Weierganz
Physikalisch-Technische Bundesanstalt (PTB), Braunschweig 38116, Germany.
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Bromberger
Weizmann Institute of Science, Rehovot 76100, Israel.
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Breskin
Core analysis; Core fluid content; Fast Neutron Resonance Radiography; Petrophysical analysis