Shale volume determination using sonic, density and neutron data

Walid M. Mabrouk; Mostafa H. Kamel

doi:10.1071/EG10014

ISSN: 0812-3985
E-ISSN: 1834-7533

Shale volume determination using sonic, density and neutron data
Authors Walid M. Mabrouk^a,b and Mostafa H. Kamel^a
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^a Geophysics Department, Faculty of Science, Cairo University, Giza, Egypt. ^b Coresponding author. Email: [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 42, Issue 2, Jun 2011, p. 155 - 158
DOI: https://doi.org/10.1071/EG10014
- Received: 07 Mar 2010
- Accepted: 11 Mar 2011
- Published online: 01 Jun 2011

Abstract

The volume of shale calculation based on naturally occurring gamma rays frequently overestimates shale volume when radioactive material other than shale is present, for example where sand appears to be shale. In this situation, shale volume calculations from other methods are highly recommended in order to avoid overestimation or underestimation of shale volume. This paper introduces an equation relating shale volume to porosity logs (neutron, density and acoustic logs), which takes into account the effect of matrix, fluid and shale parameters. This equation, which is based on the effective porosity definition and the Dresser Atlas (1982) equation, has been successfully applied to many shaly formations, regardless of the type and distribution of shale. Solved examples are used to test and compare this equation and the results come close to what actually exists, with the amount of error ranging from –5 to +5%.

The advantages of the proposed equation can be summarised as: (1) it is a function of several parameters that affect the determination of shale volume in one formula; (2) it collects the three porosity tools for a more accurate calculation; and (3) it works best where radioactive material other than shale is present.

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References

Clavier C. Hoyle W. R. Meunier D. 1971Quantitative interpretation of TDT logs. Parts I and II: Journal of Petroleum Technology 23 743 763 10.2118/2658‑A
https://doi.org/10.2118/2658-A [Google Scholar]
Dresser Atlas, 1979, Log interpretation charts: Dresser Industries.
[Google Scholar]
Dresser Atlas, 1982, Log interpretation charts: Dresser Industries.
[Google Scholar]
Fertl W. H. 1987Log-derived evaluation of shaly clastic reservoirs: Journal of Petroleum Technology 39 175 194 10.2118/14061‑PA
https://doi.org/10.2118/14061-PA [Google Scholar]
Hilchie, D. W., 1978, Applied open hole log interpretation: Golden, Colorado: D. W. Hilchie.
[Google Scholar]
Kamel M. H. Mabrouk W. M. 2003Estimation of shale volume using a combination of the three porosity logs: Journal of Petroleum Science Engineering 40 145 157 10.1016/S0920‑4105(03)00120‑7
https://doi.org/10.1016/S0920-4105(03)00120-7 [Google Scholar]
Ruhovets N. 1990A Log analysis technique for evaluating laminated reservoirs in the Gulf Coast area: The Log Analyst 31 294 303
[Google Scholar]
Schlumberger, 1975, A guide to wellsite interpretation of the Gulf Coast: Schlumberger Well Services.
Steiber R. G. 1973 Optimization of shale volumes in open hole logs: Journal of Petroleum Technology 31 147 162
[Google Scholar]
Tenchov G. G. 1998Evaluation of electrical conductivity of shaly sands using the theory of mixtures: Journal of Petroleum Science Engineering 21 263 271 10.1016/S0920‑4105(98)00072‑2
https://doi.org/10.1016/S0920-4105(98)00072-2 [Google Scholar]
Waxman W. H. Smits L. J. M. 1968Electrical conductivities in oil-bearing shaly sands: Transactions AIME 243 107 122
[Google Scholar]
Worthington P. F. 1985The evaluation of shaly-sand concepts in reservoir evaluation: The Log Analyst 26 23 40
[Google Scholar]

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Shale volume determination using sonic, density and neutron data

Exploration Geophysics 42, 155 (2011); https://doi.org/10.1071/EG10014

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Article Type: Research Article

Keyword(s): shale volume, sonic density and neutron logs, shale volume from porosity.

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Shale volume determination using sonic, density and neutron data

Abstract

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