1887
Volume 8, Issue 3
  • ISSN: 1354-0793
  • E-ISSN:

Abstract

The connectivity of reservoir bodies has been tested in unfaulted and variably faulted, high resolution 3D geocellular stratigraphic models (16 million cells in a 20 km × 20 km × . 600 m volume) from the East Pennine Coalfield, UK. These deterministic stratigraphic–structural models are underpinned by high density borehole and mineplan data. The stratigraphy extends from mid-Westphalian A to base Westphalian C and represents a low net:gross (0.03–0.27) coal-bearing, delta top/fluvial reservoir analogue. The models contain up to 1467 post-depositional normal faults with maximum displacements ranging from 1 m to 140 m. Using two sets of facies as net, the effect of fault size on inferred reservoir connectivity has been assessed for stratal intervals with different sedimentary architecture, interval net:gross and thickness.

Faults often disconnect reservoirs in thinner, lower net:gross intervals containing only laterally discontinuous, channelized bodies. By contrast, faults generally increase reservoir connectivity in thick, relatively high net:gross intervals containing laterally extensive, tabular reservoir bodies. The most significant factor for fault-related reservoir connectivity is the dimensionality and scale of reservoir bodies in relation to the displacement distribution along faults. Populations of small, sub-seismic, faults (<5 m throw) can reconnect reservoir bodies that are dissected by larger displacement, seismic resolvable, faults (>20 m throw).

Loading

Article metrics loading...

/content/journals/10.1144/petgeo.8.3.263
2002-09-01
2020-05-31
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/journals/10.1144/petgeo.8.3.263
Loading
/content/journals/10.1144/petgeo.8.3.263
Loading

Data & Media loading...

  • Article Type: Research Article
Keyword(s): fault (geology) , reservoir characteristic and reservoir model
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