3D OBS->OBS Interferometry

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3D OBS->OBS Interferometry. Sherif Hanafy February 2009. Outline. Problem: Missing and sparse traces Theory: Interferometric interpolation and extrapolation Numerical results: SEG/EAGE model Conclusions and future work. Outline. Problem: Missing and sparse traces - PowerPoint PPT Presentation

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  • 3D OBS->OBS InterferometrySherif Hanafy

    February 2009

  • OutlineProblem: Missing and sparse tracesTheory: Interferometric interpolation and extrapolationNumerical results: SEG/EAGE modelConclusions and future work

  • OutlineProblem: Missing and sparse tracesTheory: Interferometric interpolation and extrapolationNumerical results: SEG/EAGE modelConclusions and future work

  • ProblemIn marine surveys, receiver interval could be large (especially in cross line direction)

    Solution: Use interferometric interpolation

  • OutlineProblem: Missing and sparse tracesTheory: Interferometric interpolation and extrapolationNumerical results: SEG/EAGE modelConclusions and future work

  • TheoryVirtual sourceVirtual receiver

  • WorkflowInput Field DataWater Layer ThicknessGenerate GF for Water MultiplesInterpolate/Extrapolate Missing DataMax. Itr (MF)Get Virtual CSGMax Iter Intr/ExtrFinal CSGNMatching FilterNYYInput DataUnfiltered VirtualFiltered VirtualG(x|B)G(B|A)G(x|A)

  • OutlineProblem: Missing and sparse tracesTheory: Interferometric interpolation and extrapolationNumerical results: SEG/EAGE modelConclusions and future work

  • SEG/EAGE Velocity Model

  • Acquisition ParametersInput8 StreamersCrossline offset is 30 m Inline offset is 12 m170 receivers/streamerTotal number of receivers 1360Goal22 StreamersCrossline offset is 10 m Inline offset is 4 m508 receivers/streamerTotal number of receivers 11176

  • SEG/EAGE Model Input Data

  • SEG/EAGE Model Virtual Data

  • SEG/EAGE Model Real Data

  • OutlineProblem: Missing and sparse tracesTheory: Interferometric interpolation and extrapolationNumerical results: SEG/EAGE modelConclusions and future work

  • Conclusions3D marine SSP data can be interpolated with interferometry.Proposed approach is successfully tested on a synthetic model.Number of receivers can be increased 8 to 10 times by interferometry.

  • Future WorkExtrapolation of the dataTest on field data, we need field data to complete this part

  • AcknowledgementWe would like to thank the UTAM 2008 sponsors for their support.Thank You