COMBINATION OF COMPRESSIONAL AND SHEAR ATTENUATIONS TO INVESTIGATE A CARBONATE RESERVOIR

F. Bouchaala, M. Y. Ali, J. Matsushima

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Combining seismic attenuations of P and S waves may be an efficient tool for reservoir characterization. However, extraction of S waves is challenging especially in carbonate reservoirs known by their high heterogeneity and their complex texture. To overcome such challenge, we carefully processed three component VSP data before a proper extraction of S downgoing waves. The high scattering magnitudes is in agreement with high heterogeneous nature of carbonate rocks. The attenuation show a good sensitivity to the presence of the oil and helps for the distinction between reservoir and dense zones. Such distinction is possible because of the difference in attenuation mechanisms in both zones. Contrary to fully saturated sandstones, compressional to shear attenuation ratio in the fully saturated reservoir zone is higher than one. This is because physical models describing attenuation in partial and fully sandstones are too simple for carbonate rocks.

Original languageBritish English
Title of host publication82nd EAGE Conference and Exhibition 2021
Pages4648-4652
Number of pages5
ISBN (Electronic)9781713841449
StatePublished - 2021
Event82nd EAGE Conference and Exhibition 2021 - Amsterdam, Virtual, Netherlands
Duration: 18 Oct 202121 Oct 2021

Publication series

Name82nd EAGE Conference and Exhibition 2021
Volume6

Conference

Conference82nd EAGE Conference and Exhibition 2021
Country/TerritoryNetherlands
CityAmsterdam, Virtual
Period18/10/2121/10/21

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