Actas de congresos
Effect Of Overburden Pressure On Anisotropic Parameters In A Layered Orthorhombic Medium
Registro en:
9781617829666
73rd European Association Of Geoscientists And Engineers Conference And Exhibition 2011: Unconventional Resources And The Role Of Technology. Incorporating Spe Europec 2011. Society Of Petroleum Engineers, v. 7, n. , p. 5315 - 5319, 2011.
2-s2.0-80052451958
Autor
Omoboya O.
De Figueiredo J.J.S.
Dyaur N.
Stewart R.R.
Institución
Resumen
A physical modeling study of the effect of overburden pressure on anisotropic parameters was conducted using intrinsically orthorhombic phenolic boards as the model. These boards were coupled together with the help of a pressure device and uniaxial stress was gradually increased while time arrival and velocity measurements were repeated. Results show maximum increase in compressional and shear wave velocities ranging from 4% to 10% in different directions as a function of increasing uniaxial stress. Anisotropic parameter gamma generally diminished with increasing pressure and ranged from 0% to 33%. We observed anisotropic behavior attributable to both orthorhombic and VTI symmetries. Polar anisotropy behavior is due primarily to layering or bedding and tends to increase with pressure. Certain anisotropic parameters however unveil inherent orthotropic symmetry of phenolic. 7
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