1887

Abstract

Summary

Natural fracture patterns in folded carbonates are highly heterogeneous. The present-day fractures are often the result of pre-folding, syn-folding and post-folding related fractures. Furthermore, syn-folding fractures may differ in different domains of the fold. Although there are studies that characterize fracture patterns in outcropping folds, there is still a poor understanding of the relation between large-scale deformation (i.e. folding), and small-scale deformation (i.e. fractures), especially in terms of stresses and process-based predictions of fractures. Our overarching goal is to assess the sensitivity of reservoir-scale flow to different fracture patterns and different fracture properties. Therefore we build multi-scale models of 3D fracture networks in outcropping folds in the foothills of the Tunisian Atlas (central Tunisia). The fracture data is collected from outcrops using efficient methods that collect both fractures and the 3D geometry of the outcrops. We interpret small-scale deformation in terms of stresses and combine this with fold-scale mechanical models to predict the fracture patterns in 3D throughout the fold. The 3D model is used to model fracture fluid flow. This work presents a new approach to outcrop studies, that distinguishes different stages of fracturing and uses stresses to make predictions about fracture patterns in similar structures.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.20140621
2014-06-16
2020-05-30
Loading full text...

Full text loading...

References

  1. Becker, S.P., Eichhubl, P., Laubach, S.E., Reed, R.M., Lander, R.H. and Bodnar, R.J.
    [2010] A 48 m.y. history of fracture opening, temperature, and fluid pressure: Cretaceous Travis Peak Formation, East Texas basin. Geological Society of America Bulletin, 122(7–8), 1081–1093. doi:10.1130/B30067.1
    https://doi.org/10.1130/B30067.1 [Google Scholar]
  2. Bergbauer, S. and Pollard, D.D.
    [2004] A new conceptual fold-fracture model including prefolding joints, based on the Emigrant Gap anticline, Wyoming. Geological Society of America Bulletin, 116(3–4), 294–307. doi:10.1130/b25225.1
    https://doi.org/10.1130/b25225.1 [Google Scholar]
  3. Hardebol, N.J. and Bertotti, G.
    [2013] DigiFract: A software and data model implementation for flexible acquisition and processing of fracture data from outcrops. Computers & Geosciences, 54, 326–336. doi:10.1016/j.cageo.2012.10.021
    https://doi.org/10.1016/j.cageo.2012.10.021 [Google Scholar]
  4. Smart, K.J., Ferrill, D.A. and Morris, A.P.
    [2009] Impact of interlayer slip on fracture prediction from geomechanical models of fault-related folds. AAPG Bulletin, 93(11), 1447–1458. doi:10.1306/05110909034
    https://doi.org/10.1306/05110909034 [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.20140621
Loading
/content/papers/10.3997/2214-4609.20140621
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error