Petroleum Science >2015, Issue 2: 264-272 DOI: https://doi.org/10.1007/s12182-015-0029-6
A rock physics model for the characterization of organic-richshale from elastic properties Open Access
文章信息
作者：Ying Li,Zhi-Qi Guo,Cai Liu,Xiang-Yang Li and Gang Wang
作者单位：
College of Computer Science and Technology, Jilin University, Changchun 130012, Jilin, China;College of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, Jilin, China;College of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, Jilin, China;British Geological Survey, Edinburgh EH9 3LA, UK CNPC Key Laboratory of Geophysical Prospecting, China University of Petroleum, Beijing 102249, China;College of Computer Science and Technology, Jilin University, Changchun 130012, Jilin, China
投稿时间：2014-07-24
引用方式：Li, Y., Guo, ZQ., Liu, C. et al. Pet. Sci. (2015) 12: 264. https://doi.org/10.1007/s12182-015-0029-6
文章摘要
Kerogen content and kerogen porosity play a
significant role in elastic properties of organic-rich shales.
We construct a rock physics model for organic-rich shales
to quantify the effect of kerogen content and kerogen
porosity using the Kuster and Tokso¨z theory and the selfconsistent
approximation method. Rock physics modeling
results show that with the increase of kerogen content and
kerogen-related porosity, the velocity and density of shales
decrease, and the effect of kerogen porosity becomes more
obvious only for higher kerogen content. We also find that
the Poisson’s ratio of the shale is not sensitive to kerogen
porosity for the case of gas saturation. Finally, for the
seismic reflection responses of an organic-rich shale layer,
forward modeling results indicate the fifth type AVO responses
which correspond to a negative intercept and a
positive gradient. The absolute values of intercept and
gradient increase with kerogen content and kerogen porosity,
and present predictable variations associated with
velocities and density.
significant role in elastic properties of organic-rich shales.
We construct a rock physics model for organic-rich shales
to quantify the effect of kerogen content and kerogen
porosity using the Kuster and Tokso¨z theory and the selfconsistent
approximation method. Rock physics modeling
results show that with the increase of kerogen content and
kerogen-related porosity, the velocity and density of shales
decrease, and the effect of kerogen porosity becomes more
obvious only for higher kerogen content. We also find that
the Poisson’s ratio of the shale is not sensitive to kerogen
porosity for the case of gas saturation. Finally, for the
seismic reflection responses of an organic-rich shale layer,
forward modeling results indicate the fifth type AVO responses
which correspond to a negative intercept and a
positive gradient. The absolute values of intercept and
gradient increase with kerogen content and kerogen porosity,
and present predictable variations associated with
velocities and density.
关键词
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Rock physics Organic-rich shale Kerogen content Kerogen porosity AVO