1887

Abstract

Summary

Advances in full wavefield inversion (FWI), 4D seismic technology, and depth migration of seismic data have led to the application of FWI to 4D seismic data in which time lapse changes of velocity model can be directly obtained from the data. It has been shown that correcting for velocity changes due to production in depth migration improves 4D imaging repeatability. In this paper, we present a detailed workflow to correct for large acoustic velocity changes due to production using the FWI 4D results. Through FWI 4D application, we achieved seismic processing cycle time reduction in a recent 4D seismic project. We have also tested the FWI 4D methodology in areas of poor seismic repeatability due to production facility obstruction to seismic data acquisition.

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/content/papers/10.3997/2214-4609.201413461
2015-06-01
2019-12-10
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References

  1. 1.Routh, P., Palacharla, G., Chikichev, I., and Lazaratos, S., 2012, Full Wavefield Inversion of Time-Lapse Data for Improved Imaging and Reservoir Characterization. SEG Technical Program Expanded Abstracts 2012: pp. 1–6. doi: 10.1190/segam2012‑1043.1
    https://doi.org/10.1190/segam2012-1043.1 [Google Scholar]
  2. 2.Chen, G., Chu.D., Helgerud, M., Chang, D., Gorysheva, I., Palacharla, G., Zantout, S., Dewberry, S., Trantham, C., Leveque, T., Hernandez, D., Contreiras, O., Hohrath, A., Johnston, D., and Hodges, E., 2014, Improving 4D Seismic Imaging by Modifying Baseline Depth Migration Velocity Model, EAGE Expanded Abstracts.
    [Google Scholar]
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