1887

Abstract

Summary

The Kuqa foreland basin is rich in oil and gas resources. However, the images of interest subsalt overthrust structures often have significant distortions due to strong lateral heterogeneity in the shallow and middle-deep velocity. The precise velocity estimation is the key to solve this imaging problem. In this paper, two steps are taken: Firstly, we obtain the accurate shallow velocity with the tomographic inversion based on BP (back propagation) neural network. Secondly, we build the proper middle-deep velocity with the ADCIGs (angle domain common imaging gathers) based tomographic inversion under the constraints of geological knowledge and logging data. The resulting PSDM (prestack depth migration) images are greatly improved and consistent with well data.

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/content/papers/10.3997/2214-4609.201801651
2018-06-11
2020-05-27
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References

  1. Liu, Z., and Bleistein, N.
    [1992] Velocity analysis by residual moveout: 62th Annual International Meeting, SEG, Expanded Abstracts, 1034–1036.
    [Google Scholar]
  2. Jinming, Z., John, M. and Gail, L.
    [2010] A case study for azimuthally anisotropic prestack depth imaging of an onshore Alaska prospect: Geophysics, 75(4), 177–186.
    [Google Scholar]
  3. Jorge, O., Ursula, I., and Jonathan, S.
    [2014] Parra Neural network and rock physics for predicting and modeling attenuation logs: 84th Annual International Meeting, SEG, Expanded Abstracts, 633–637.
    [Google Scholar]
  4. Biondi, B. and Tisserant, T.
    [2004] 3D angle-domain common-image gathers for migration for migration velocity analysis: Geophysical Prospecting, 52(4), 575–591.
    [Google Scholar]
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