APPLICATIONS OF TECHNOLOGY: Imaging hydrocarbon reservoirs


ABSTRACT: Berkeley Lab’s AnisWave2D software is computationallyefficient, fully anisotropic finitedifference code for modeling seismic wave propagation in complex media like that surrounding hydrocarbon reservoirs. Most hydrocarbon reservoirs are overlain by low seismic velocity and anisotropic sediments whose effects on the wavefield must be considered in order to successfully image deeper structures. Conventional uniformgrid finitedifference (FD) schemes running on a single processor cannot tackle largescale anisotropic models with realistic velocity structure. AnisWave’s use of variable grid spacing improves the efficiency of the FD method by avoiding the oversampling of high velocity zones that occurs in uniform grid methods. This enables more efficient modeling of materials with strong velocity contrasts, such as boreholes, fractures and soft marine sediments. The use of variablegridding combined with parallelization and optimization of the code greatly increases the complexity of the problems that can be tackled, without sacrificing accuracy.


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REFERENCE NUMBER: CR1878, 2089 

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