发明名称 |
WAVE-EQUATION MIGRATION VELOCITY ANALYSIS USING IMAGE WARPING |
摘要 |
An objective function is disclosed that extracts the velocity error information directly in the image domain without computing common-image gathers. Because of the dimensionality of the problem, gradient-based methods (such as the conjugate-gradient algorithm) are used in the optimization procedure. In order to include the full complexity of the wavefield in the velocity estimation algorithm, a two-way (as opposed to one-way) wave operator is considered, where the imaging operator is not linearized with respect to the model parameters (as in linearized wave-equation migration velocity analysis), and the gradient of the objective function is determined using the adjoint-state method. The velocity estimation methodology is illustrated with a few synthetic examples. |
申请公布号 |
EP2732312(A4) |
申请公布日期 |
2015.12.23 |
申请号 |
EP20120811440 |
申请日期 |
2012.07.12 |
申请人 |
COLORADO SCHOOL OF MINES;ENI S.P.A. |
发明人 |
SAVA, PAUL;PERRONE, FRANCESCO;ANDREOLETTI, CLARA;BIENATI, NICOLA |
分类号 |
G01V1/00 |
主分类号 |
G01V1/00 |
代理机构 |
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地址 |
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