Seismic characterization of reservoirs containing multiple fracture sets

2007 ◽  
Author(s):  
Colin M. Sayers
Keyword(s):  
Multiple Fracture ◽  
Seismic Characterization

scholarly journals Seismic characterization of multiple fracture sets at Rulison Field, Colorado

Geophysics ◽  
2007 ◽  
Vol 72 (2) ◽  
pp. B19-B30 ◽  
Author(s):  
Ivan Vasconcelos ◽  
Vladimir Grechka
Keyword(s):  
Velocity Model ◽  
Multiple Fracture ◽  
Fracture Characterization ◽  
Seismic Reflection Data ◽  
Characterization Methods ◽  
S Waves ◽  
Reflection Data ◽  
Seismic Characterization ◽  
Inversion Procedure

Conventional fracture-characterization methods assume the presence of a single set of aligned, vertical cracks in the subsur-face. We relax this assumption and demonstrate the feasibility of seismic characterization of multiple fracture sets. Our technique relies on recent numerical findings indicating that multiple, differently oriented, possibly intersecting planar cracks embedded in an otherwise isotropic host rock result in a nearly orthorhombic (or orthotropic) effective medium. Here, the governing parameters of crack-induced orthotropy are estimated from 3D, wide-azimuth, multicomponent seismic reflection data acquired over the tight-gas Rulison Field in Colorado. We translate strong azimuthal variations of the normal-moveout velocities intointerval crack densities, fracture orientations, type of fluid infill, and velocities of P- and S-waves in an unfractured rock. Our inversion procedure identifies a set of cracks aligned in approximately west northwest-east southeast direction in the western part of the study area and multiple, likely intersecting fractures in its eastern part. We validate both our underlying theoretical model and the obtained estimates by two independent measurements: (1) the estimated fluid-infill parameter indicates dry cracks as expected for the gas-producing sandstones at Rulison; and (2) the obtained crack orientations are supported by well observations. As a by-product of fracture characterization, we build an anisotropic velocity model of the Rulison reservoir which, we believe, is the first orthorhombic velocity field constructed from surface seismic data.

Seismic Characterization of the Shuaiba Formation in the Western Region of UAE, a Predictive Tool to unravel Shuaiba Facies Mosaic?

2017 ◽  
Author(s):  
Valentina Zampetti ◽  
Sonia Perrotta ◽  
Ghassen Chaari ◽  
Thomas Krayenbuehl ◽  
Matthias Braun ◽  
...  
Keyword(s):  
Western Region ◽  
Predictive Tool ◽  
Seismic Characterization ◽  
The Western Region

Sharing Geophysical Data for Seismic Characterization of the Matera (Southern Italy) Urban Area

2021 ◽  
Author(s):  
N. Tragni ◽  
G. Calamita ◽  
L. Lastilla ◽  
V. Belloni ◽  
R. Ravanelli ◽  
...  
Keyword(s):  
Urban Area ◽  
Southern Italy ◽  
Geophysical Data ◽  
Seismic Characterization

Seismic characterization of hyperconcentrated flows in a volcanic environment

2018 ◽  
Vol 43 (10) ◽  
pp. 2219-2231 ◽  
Author(s):  
Velio Coviello ◽  
Lucia Capra ◽  
Rosario Vázquez ◽  
Victor H. Márquez-Ramírez
Keyword(s):  
Seismic Characterization ◽  
Volcanic Environment

scholarly journals Geometry and seismic characterization of the subsoil below the Amphitheatrum Flavium, Rome

2017 ◽  
Vol 60 (4) ◽  
Author(s):  
Ettore Cardarelli ◽  
Michele Cercato ◽  
Luciana Orlando
Keyword(s):  
Seismic Characterization
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