AVO analysis of thin coalbed with dirt band

DOI

10.2991/iceeg-16.2016.54How to use a DOI?

Keywords

AVO, thin coalbed, dirt band

Abstract

Zoeppritz equations can only describe the reflection and transmission of plane waves incident on a single interface. It cannot deal with the thin bed case. The presence of dirt band in thin coalbed makes the problem even more complicated. We present an AVO (amplitude variation with offset) analysis of thin coalbed with dirt band. We derive equations to calculate the exact solution of reflection and transmission coefficients. Two models are built, one contains a single thin coalbed and the other one insert a dirt band into the coalbed. Both P-P and P-S reflection coefficients are analyzed with varying incidence angle, dominant frequency of plane wave, thickness and position of dirt band. We conclude: (1) dirt band has great effect on the reflection coefficients; (2) the dominant frequency and thickness of dirt band have greater effect on the reflection coefficients; (3) the position of dirt band may be difficult to be obtained using AVO response because it has little effect on the reflection coefficients.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yongxu Lu
AU  - Suping Peng
AU  - Wenfeng Du
AU  - Peng Lin
AU  - Le Xu
PY  - 2016/06
DA  - 2016/06
TI  - AVO analysis of thin coalbed with dirt band
BT  - Proceedings of the 7th International Conference on Environment and Engineering Geophysics & Summit Forum of Chinese Academy of Engineering on Engineering Science and Technology
PB  - Atlantis Press
SP  - 196
EP  - 199
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceeg-16.2016.54
DO  - 10.2991/iceeg-16.2016.54
ID  - Lu2016/06
ER  -