Azimuthal offset‐dependent attributes applied to fracture detection in a carbonate reservoir
Author(s)
Shen, Feng; Sierra, Jesus V; Burns, Daniel R; Toksoz, M. Nafi
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Offset-dependent attributes-amplitude versus offset (AVO) and frequency versus offset-are extracted from 2-D P-wave seismic data using the multiple signal classification technique. These attributes are used to detect fracture orientation in a carbonate reservoir located in the Maporal field in the Barinas basin of southwestern Venezuela. In the fracture normal direction, P-wave reflectivity is characterized by a large increase of amplitude with offset (large positive AVO gradient) and a large decrease of frequency with offset (large negative frequency versus offset gradient). In the fracture strike direction, P-wave reflectivity shows a scattered variation in AVO but a small variation in frequency with offset. Our results also show that the reservoir heterogeneity can lead to large variations of AVO signatures and that using azimuthal offset-dependent frequency attributes can help lessen the ambiguity when detecting fracture orientation.
Date issued
2002-03Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences; Massachusetts Institute of Technology. Earth Resources LaboratoryJournal
Geophysics
Publisher
Society of Exploration Geophysicists
Citation
Shen, Feng et al. “Azimuthal Offset‐dependent Attributes Applied to Fracture Detection in a Carbonate Reservoir.” GEOPHYSICS 67.2 (2002): 355–364. © 2002 Society of Exploration Geophysicists
Version: Final published version
ISSN
0016-8033
1942-2156