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Fracture-Induced Frequency-Dependent Anisotropy, Yibal Field, OmanNormal access

Authors: A. Al-Anboori, M. Kendall and M. Chapman
Event name: 68th EAGE Conference and Exhibition incorporating SPE EUROPEC 2006
Session: Passive Seismic
Publication date: 12 June 2006
DOI: 10.3997/2214-4609.201402236
Organisations: SPE, EAGE
Language: English
Info: Extended abstract, PDF ( 259.4Kb )
Price: € 20

Fracture size is one of the main parameters that reservoir engineers are interested in due to its importance in hydrocarbon production. We estimate the fracture size using the Chapman (2003) theory of frequency-dependent shear-wave splitting on microseismic data recorded in the Yibal field. The Natih A reservoir demonstrates the largest fracture size and fracture density of 2 m and 0.07-0.23, respectively, as expected for a highly fracture reservoir. In contrast, the Fiqa exhibits moderate fracture density (3%) with fine-scale fractures (<0.1 micrometer in size) as expected for a seal rock. Collectively, the results of frequency-dependent S-wave splitting are mainly controlled by lithology.

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