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E-190 - Well Logging & Basic Log Interpretation

32 heures LOG/BLWLI
Niveau
Fondamentaux
Public
  • Geologists, geophysicists, reservoir engineers interested in well log interpretation
Finalité
  • To provide a practical understanding of basic concepts and methodology of well log acquisition and interpretation for subsurface or reservoir studies
Objectifs
  • To understand wireline and mud log acquisition techniques
  • To grasp fundamental physics of log measurements and perform log quality control
  • To perform basic log interpretation to identify and characterize reservoirs
Les + pédagogiques
  • Before training starts, 2 hours are dedicated to introduce the training agenda, methods and tools
  • The exact needs and expectations of each participant are also assessed and discussed (MCQ and phone interview with the tutor)
Observation
Total duration of the training is 32 hours, spread over an 8-week period

Basic interpretation concepts 8 heures
  • Seals and reservoirs
  • Definition of main reservoir petrophysical and fluid properties (lithology, porosity, resistivity, saturation)
  • Fundamental equations for log interpretation in clean formations
  • Environment of measurement (drilling, borehole, invasion process)
Measurements and applications 12 heures
  • Mud logging and coring operations
  • Wireline logging operations
  • The log: header, calibrations, parameters, repeat section, main log
  • Logging tool principle, limitation, application, quality control
  • Caliper, gamma ray and GR spectrometry, spontaneous potential
  • Resistivity (induction, laterolog) and microresistivity measurements
  • Porosity and lithology measurements: nuclear (litho-density, neutron) and acoustic logging
Basic log interpretation 12 heures
  • Wireline log interpretation in clean formations:
  • Identification of shales, common geological formations and reservoirs
  • Cross-plot technique with density and neutron
  • Identification of fluid contacts
  • Hydrocarbon effects on logs
  • Determination of lithology and porosity
  • Determination of Rw (SP, Ratio, Rwa)
  • Determination of water and hydrocarbon saturations
  • Case of oil based mud
  • Estimation of h.Phi.So