FRACTURED BASEMENTS

Fracture analysis and facies of Palaeozoic rocks and granites

 

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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.

Cost: €1,000
Dates: September 12-16, 2017 (closing date September 1)
Instructors: Jon Gutmanis and Valentí Turú
Assistant: Lluís Ardèvol i Oró
Location: central Pyrenees (Catalonia and Andorra), the course begins and ends in Barcelona
Meeting point: Barcelona, Cullera de Boix bar, 26 Ronda Sant Pere; September 12, 14:00h/after lunch
Trip end: September 16, Barcelona airport 17:30h; meeting point around 18:00h
Level: basic / skill
Delivery: field trip + 1h daily classroom
Physical demand: easy short hike on level terrain

FIELD TRIP OUTLINE

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)

Fractures

  • 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