1887

Abstract

Summary

We constrain fracture networks in flat-lying shallow water carbonates producing fracture models at scale from cm-to tens of meters over a large area of several tens of km2.Imaging is integrated with structural observation on the ground and isotope studies on the vein infill.

Structures observed are sub-vertical mode I and hybrid veins displaying a conjugate pattern, sub-vertical stylolites and sub-horizontal stylolites.

The structures formed during subsidence through a stress field characterized by the presence of a significant sub-horizontal tectonic stress.

Little deformation occurred in the uppermost 400-500m. Wholesale fracturing affected the carbonates at depths between 500 and 800m resulting in a pervasive network of open fractures and stylolites. Increasing development of sub-horizontal stylolites generated the calcite which eventually sealed the fractures.

Using the acquired fracture network, we test the impact of different aperture models on flow simulations

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201601355
2016-05-31
2020-03-29
Loading full text...

Full text loading...

References

  1. Bisdom, K., Bertotti, G. Nick, H.
    , submitted. The impact of different aperture distributions and critical stress criteria on equivalent permeability in complex fracture networks.
    [Google Scholar]
  2. 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, v. 54, p. 326–336, doi: 10.1016/j.cageo.2012.10.021.
    https://doi.org/10.1016/j.cageo.2012.10.021 [Google Scholar]
  3. de Matos, R.M.D.
    , 1992, The Northeast Brazilian Rift System: Tectonics, v. 11, no. 4, p. 766, doi: 10.1029/91TC03092.
    https://doi.org/10.1029/91TC03092 [Google Scholar]
  4. Nogueira, F.C.C., Marques, F.O., Bezerra, F.H.R., de Castro, D.L., and Fuck, R.A.
    , 2015, Cretaceous intracontinental rifting and post-rift inversion in NE Brazil: Insights from the Rio do Peixe Basin: Tectonophysics, v. 644–645, p. 92–107, doi: 10.1016/j.tecto.2014.12.016.
    https://doi.org/10.1016/j.tecto.2014.12.016 [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201601355
Loading
/content/papers/10.3997/2214-4609.201601355
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