1887

Abstract

Summary

Faults are 3D narrow zones of highly and heterogenously strained rocks, with petrophysical properties differing from the host rock, and are primary controls on fluid flow in reservoirs. We present a synthetic workflow to assess the potential of seismic data for imaging fault structure and internal properties. The workflow is based on a discrete element model (DEM) of faulting, simple relations to modify the seismic properties based on volumetric strain, and a ray-based modelling (pre-stack depth migration or PSDM simulator). Parameters such as wave frequency and their impact on the resulting seismic image are evaluated with the PSDM simulator. We illustrate the application of the workflow to a large displacement 3D normal fault in an interlayered sandstone-shale sequence in two mdoels, one with constant fault slip and the second with linearly variable fault slip along strike. DEM produces realistic fault geometries and strain fields. Seismic cubes at a high wave frequencies show the complexity of the faults, with reflectors offset and laterally affected. As the wave frequency decreases the fault traces become simplier. Seismic extracted fault geobodies make a direct link between the seismic, the DEM and the internal properties of the faults.

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/content/papers/10.3997/2214-4609.20141072
2014-06-16
2020-07-02
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References

  1. Botter, C., Cardozo, N., Hardy, S., Lecomte, I. and Escalona, A.
    [2012] Mechanical Modelling and Seismic Imaging of Fault Zones. Extended Abstract, 3rd International Conference on Fault and Top Seals - From Characterization to Modelling, Montpellier.
    [Google Scholar]
  2. Faulkner, D.R., Jackson, C.A.L., Lunn, R.J. et al.
    [2010] A review of recent developments concerning the structure, mechanics and fluid flow properties of fault zones. Journal of Structural Geology, 32, 1557–1575.
    [Google Scholar]
  3. Hardy, S., McClay, K.R. and Muñoz, J.A.
    [2009] Deformation and fault activity in space and time in high-resolution numerical models of doubly-vergent thrust wedges. Marine and Petroleum Geology, 26, 232–248.
    [Google Scholar]
  4. Lecomte, I.
    [2008] Resolution and illumination analyses in PSDM: A ray-based approach. The Leading Edge, 27, 650–663.
    [Google Scholar]
  5. Long, J.J. and Imber, J.
    [2011] Geological controls on fault relay zone scaling. Journal of Structural Geology, 33(12), 1790–1800.
    [Google Scholar]
  6. Mora, P. and Place, D.
    [1993] A lattice solid model for the non-linear dynamics of earthquakes. International Journal of Modern Physics, 4, 1059–1074.
    [Google Scholar]
  7. Skurtveit, E., Torabi, A., Gabrielsen, R.H. and Zoback, M.D.
    [2013] Experimental investigation of deformation mechanisms during shear-enhanced compaction in poorly lithified sandstone and sand. Journal of Geophysical Research: Solid Earth, 118(8), 4083–4100.
    [Google Scholar]
  8. Townsend, C., Firth, I.R., Westerman, R., Kirkevollen, L., Harde, M. and Andersen, T.
    [1998] Small seismic-scale fault identification and mapping. In: Jones, G., Fisher, Q.J. and Knipe, R.J. (Eds)Faulting, Fault Sealing and Fluid Flow in Hydrocarbon Reservoirs. Geological Society of London, Special Publications, 147, 1–25.
    [Google Scholar]
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