Fracture analysis of Paleozoic and cristaline rocks for oil and geothermal

Appraisal and development of fractured basement and Palaeozoic reservoirs remains a significant challenge because of the generally high degree of heterogeneity in the intensity, distribution and connectivity of the open fracture system. This fractured basements field course sets out to equip the oil industry geoscientist and reservoir engineer with the essential basic knowledge from structural geology, fracture characterisation and rock mechanics to work with fractured basement reservoirs.

Field trip guides: Jon Gutmanis and Valentí Turú
Location: central Pyrenees (Catalonia and Andorra), the workshop begins and ends in Barcelona
Level: basic / skill
Delivery: workshop + field trip
Physical demand: easy short hike on level terrain


Outcrops and facies

  • Cambro-Ordovician slates and gneiss
  • Cambro-Ordovician quartzites (tidal, shallow marine)
  • Devonian layered limestones (shallow vs deep water)
  • Permian granites (fractured, weathered)


  • An overview of Palaeozoic and basement reservoirs and their characteristics (classroom)
  • Structural geology and geomechanics for fractured reservoir characterisation (classroom)
  • Introduction to basement fracture models with case histories (classroom)
  • Drilling and geomechanics in basement reservoirs
  • Basement and Palaeozoic fracture types, properties and scales: from joints to fracture corridors to large faults and their damage zones
  • Relationships between fractures, facies and mechanical stratigraphy
  • The coupled relationship between in situ stress, mechanical anisotropy and fracture distribution
  • Properties of granite weathered zones

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