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Fracture Spacing and Orientation Estimation from Spectral Analyses of Azimuth Stacks
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2005)
Discrete, vertically aligned fracture systems impart one or more notches in the spectral ratios of stacked reflected seismic traces. This apparent attenuation is due to the azimuth dependant scattering introduced by the ...
Nonlinear Soil Response in the Near-Field of a Vibrator Truck: Application to Land Seismic Surveys
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2007)
The nonlinear behavior of soils can significantly modify the wavelet radiated from
vibrator trucks. In this paper, we describe a field experiment designed to measure the
nonlinear response of a natural soil formation in ...
Orientation Estimation for Multiple Large Fractures by Scattering Energy
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2006)
We have done the numerical modeling of seismic response to multiple sets of vertical large fractures by using finite-difference method (FD), which can easily handle media with monoclinic anisotropy. We consider three types ...
Spatial Orientation And Distribution Of Reservoir Fractures From Scattered Seismic Energy
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2005)
We present the details of a new method for determining the reflection and scattering characteristics of seismic energy from subsurface fractured formations. The method is based upon observations we have made from 3D finite ...
Fracture Characterization from Scattered Energy: A Case Study
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2006)
We use 3D surface seismic data to determine the presence and the preferred orientation of fracture corridors in a field. The Scattering Index method is proving to be a robust tool for detecting and mapping fracture corridors. ...
Spatial Orientation and Distribution of Reservoir Fractures from Scattered Seismic Energy
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2006)
We present the details of a new method for determining the reflection and scattering characteristics of seismic
energy from subsurface fractured formations. The method is based upon observations we have made from 3D ...
Comparison of Discrete Fracture and Effective Media Representation of Fractures on Azimuthal AVO
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2005)
In fractured reservoir development, azimuthal AVO (AVOaz) properties of reflected PP waves from reservoir tops are often used to infer fracture properties. The fracture parameter inversion is based on either an effective ...
Fracture Detection using Amplitude versus Offset and Azimuth Analysis of a 3D P-wave Seismic Dataset and Synthetic Examples
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2004-05-26)
Amplitude versus offset (AVO) analysis of seismic reflection data has been a successful tool in describing changes in rock properties along a reflector. This method is extended to azimuthal AVO (AVOA) in order to characterize ...
F-K Characteristics of the Seismic Response to a Set of Discrete Parallel Fractures
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2006)
We model seismic wave propagation in a reservoir with discrete fracture zones using a finite difference scheme, which implements the Coates-Schoenberg formulation for fractured media. We study the variation of scattered ...
Imaging Salt Dome Flank and Dipping Sediments Using Time Reversed Acoustics
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2006)
In this paper we define the theory and basic principles to move (redatum) the surface shots from a walk away VSP to be as if they had been located in the borehole. We will refer to this theory using several of the terms ...