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Influence of the Pore System Properties on P-wave Attenuation in CarbonatesNormal access

Authors: L.C. Oliveira, R. Missagia, I. Lima Neto and M.A. Ceia
Event name: 80th EAGE Conference and Exhibition 2018
Session: Poster: Rock Physics A - Carbonates and Source Rocks
Publication date: 11 June 2018
DOI: 10.3997/2214-4609.201800864
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 3.98Mb )
Price: € 20

Summary:
Biot's theory of poroelasticity provides a theoretical basis for phenomena understanding of the attenuation due to the elastic wave propagation. Carbonate rocks have complex pore system with a variety of pore types and a wide range of pore size. Many studies indicate that pore size, pore shape and geometry, and amount of micropores are important factors influencing P-wave attenuation in rock pores, and can explain the variation of attenuation at the same porosity. Therefore, the effects of the pore structure and its properties on elastic wave attenuation cannot be neglected. In this work, the petrophysical and physical properties of carbonates data set were obtained from literature and the P-wave attenuation was estimated through the Dvorkin-Mavko model to investigate the influence of petrophysical, mineralogy, geometrical parameters and porosity scale in P-wave propagation and attenuation. The results allowed to correlate the pore geometry properties of the medium such as DomSize and PoA to attenuation effects and contributed to the understanding of the attenuation in seismic studies of carbonates and complexities of the pore system.


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