1887

Abstract

Summary

Previous methods (e.g.: Zoback, 2007) for fracture reactivation assumed a uniform stress field to apply on either fault or fracture. However, local stress is often perturbed by different mechanisms such as faulting, folding, mechanical contrast between layers, salt body effect or even subsidence caused by reservoir production. Ignoring local perturbation on the stress field can lead to unrealistic reactivation map and dramatically fail to assess fracture seal integrity. In the present work, we propose to compare fracture reactivation maps based on a uniform stress field (classic method) and a more realistic heterogeneous stress-field using a Mohr-Coulomb failure criterion. To do so, we introduce a geomechanically-based stress inversion method iBem3D that generates stress-field controlled by faulting and regional tectonic stress ( ), which are the mechanisms considered in this present work. The resulting maps show that reactivation can be dramatically different in places where seal integrity can be breached in places for uniform stress-field while likely intact for the heterogeneous stress field.

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/content/papers/10.3997/2214-4609.201800026
2018-02-05
2020-07-08
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References

  1. Maerten, F.
    , 2010, Geomechanics to solve geological structure issues: forward, inverse and restoration modeling, PhD thesis, 13 chapters, 450 pages.
    [Google Scholar]
  2. MaertenF., MaddenE., PollardD.D., Maerten, L.
    , 2016a, Incorporating fault mechanics into inversions of aftershock data for the regional remote stress, with application to the 1992 Landers, California earthquake, V 674, P. 52–64, Tectonophysics.
    [Google Scholar]
  3. Maerten, L., Maerten, F., Lejri, M., Gilespi, P.
    , 2016b, Geomechanical stress inversion using fracture data, V 89, P. 197–213, Journal of structural Geology.
    [Google Scholar]
  4. Maerten, F., Maerten, L.
    , 2016c, Stress and fracture modeling using the principle of superposition, US patent US9164192 B2.
    [Google Scholar]
  5. Maerten, L., & Maerten, F.
    , 2006, Chronologic modeling of faulted and fractured reservoirs using geomechanically based restoration: Technique and industry applications. AAPG bulletin, 90(8), 1201–1226.
    [Google Scholar]
  6. Maerten, F., Maerten, L., Plateaux, Joonnekindt, JP., Chabbert, A., Aribi, N.
    2017, Method to determine regions of potential fracture reactivation, Provisional patent application IS16.1677.
    [Google Scholar]
  7. Lejri, M., Maerten, F., Maerten, L., & Soliva, R.
    , 2015, Paleo stress inversion: A multi-parametric geomechanical evaluation of the Wallace–Bott assumptions. Tectonophysics, 657, 129–143.
    [Google Scholar]
  8. Rispoli, R.
    , 1981. Stress fields about strike-slip faults inferred from stylolites and tension gashes. Tectonophysics75, 29e36.
    [Google Scholar]
  9. Zobach, M.D.
    , 2010, Reservoir geomechanics. Cambridge, 2007.
    [Google Scholar]
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