1887

Abstract

Summary

We present results of processing of microseismic events induced by hydraulic fracturing and detected by dual downhole monitoring arrays in nearly optimal geometry providing unique insight into hydraulic fracturing. We detected and located microseismic events, determined their magnitudes, source mechanisms and inverted stress field orientation. Event locations were forming a highly linear trend above the stimulated intervals. The source mechanisms were computed only for higher quality events which were detected on sufficient number of receivers to obtain reliable result. All detected source mechanisms were dip-slip mechanisms with a steep and nearly horizontal nodal plane. The source mechanisms represent shear events, non-double-couple components were very small consistent with the noise level in data and velocity model uncertainties. The strikes of inverted mechanisms corresponding to the nearly vertical fault plane are (within the error of the measurement) identical with the strike of the location trend. Finally, regional principal stress directions were inverted from the source mechanisms. The least principal stress σ3 is perpendicular to the strike of the trend of the locations, indicating that the hydraulic fracture propagated in the direction of maximum horizontal stress.

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/content/papers/10.3997/2214-4609.201600720
2016-05-30
2024-04-26
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References

  1. Angelier, J.
    [2002] Inversion of earthquake focal mechanisms to obtain the seismotectonic stress IV — a new method free of choice among nodal lines. Geophys. J. Int., 150, 568–609.
    [Google Scholar]
  2. Baig, A. and Urbancic, T.
    [2010] Microseismic moment tensors: A path to understanding frac growth. The Leading Edge, 29(3), 320–324, doi: 10.1190/1.3353729.
    https://doi.org/10.1190/1.3353729 [Google Scholar]
  3. Eisner, L., Hulsey, B.J., Duncan, P., Jurick, D., Werner, H., and Keller, W.
    [2010] Comparison of surface and borehole locations of induced seismicity. Geophysical Prospecting, 58, 809–820, doi: 10.1111/j.1365‑2478.2010.00867.x.
    https://doi.org/10.1111/j.1365-2478.2010.00867.x [Google Scholar]
  4. Eisner, L., Gei, D., Hallo, M., Opršal, I., and Ali, M.
    [2013] The peak frequency of direct waves for microseismic events. Geophysics, 78(6), A45–A49, doi: 10.1190/geo2013‑0197.1.
    https://doi.org/10.1190/geo2013-0197.1 [Google Scholar]
  5. Rutledge, J., Yu, X., and Leaney, S.
    [2014] The Signature of Shearing Driven by Hydraulic Opening. AAPG/SEG/SPWLA HEDBERG CONFERENCE “Fundamental Parameters Associated with Successful Hydraulic Fracturing – Means and Methods for a Better Understanding”, December7–11, 2014 – Austin, Texas.
    [Google Scholar]
  6. Shearer, P.
    [2009] Introduction to Seismology. Cambridge University Press, Cambridge, UK.
    [Google Scholar]
  7. Staněk, F., and L.Eisner
    [2013] New model explaining inverted source mechanisms of microseismic events induced by hydraulic fracturing. SEG Technical Program Expanded Abstracts, 2201–2205, doi: 10.1190/segam2013‑0554.1.
    https://doi.org/10.1190/segam2013-0554.1 [Google Scholar]
  8. Vavryčuk, V.
    [2007] On the retrieval of moment tensors from borehole data. Geophysical Prospecting, 55 (3), 381–391.
    [Google Scholar]
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