Method for fracture detection using multicomponent seismic data

Details Method for fracture detection using multicomponent seismic data Method for fracture detection using multicomponent seismic data

1998-07-23

1999-12-07

Oda, Christine K

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-refraction type

367 75, 367 37, 367 73, 364421, G01V 130

Patent

active

05999486&

ABSTRACT:
The present invention provides a method for interpreting shear-wave seismic data to detect fractures in the subsurface of the earths crust. Seismic shear waves are acquired along medium symmetry planes and their corresponding AVO intercepts and gradients are estimated. The resulting AVO attributes are combined using a weighted least squares solution to estimate the change in splitting parameter and fast shear velocity, which are diagnostic of the presence of fractures. The method is also useful in assessing the porosity of the subsurface. Knowledge of subsurface fracturing and porosity is useful in locating, for example, oil and gas wells.

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Ruger, A.,Center for Wave Phenomena, Reflection Coefficients and Azimuthal AVO Analysis in Anisotropic Media, pp. 1-131, Feb. 18, 1997, Arthur Lakes Library at Colorado School of Mines.
R.H. Tatham and M.D. McCormack, Multicomponent Seismology in Petroleum Exploration, pp. i-248, 1991, U.S.A.

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