Seismic and sonic wave attenuation of carbonate rocks in an onshore abu dhabi oil field

Fateh Bouchaala, Mohammed Y. Ali, Jun Matsushima

Research output: Contribution to journalConference articlepeer-review

Abstract

Obtaining reliable attenuation values in highly heterogeneous carbonate rocks developed in Abu Dhabi oil fields is important to characterize their reservoir properties. In this study, we estimated seismic wave attenuation from first arrival waveforms of zero-offset Vertical Seismic Profiling (VSP) data by using recently developed method based on combination of seismic interferometry (SI) and modified median frequency shift (MMFS) methods. The results show that the total P-wave attenuation (1/Q) varies between 0.01 and 0.25, with significant contribution of scattering, which is due to highly heterogeneous media. Furthermore, we estimated the P- and S-wave attenuation from monopole and two kinds of dipole sonic waveforms by using the MMFS method. The monopole attenuation ranges from 0.032 and 0.052, dipole inline attenuation from 0.048 to 0.092 and dipole offline attenuation from 0.06 to 0.106. Our sonic attenuation results are compared and correlated with other petrophysical parameters, allowing us to discuss possible attenuation mechanisms for obtained attenuation results. We also demonstrated that the S-wave attenuation anisotropy is sensitive indicator of the high density of fractures.

Original languageBritish English
Pages (from-to)2780-2785
Number of pages6
JournalSEG Technical Program Expanded Abstracts
Volume35
DOIs
StatePublished - 2016
EventSEG International Exposition and 86th Annual Meeting, SEG 2016 - Dallas, United States
Duration: 16 Oct 201121 Oct 2011

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