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E-156 - Well Logging & Basic Log Interpretation

E-156 - Well Logging & Basic Log Interpretation

32 hours

  • Well log acquisition and basic interpretation of clean formations.

This course is not scheduled.
Who should attend?


    • Geologists, geophysicists, reservoir engineers interested in well log interpretation.


  • Foundation
  • This course provides a practical understanding of basic concepts and methodology of well log acquisition and interpretation for subsurface and reservoir studies.
Learning Objectives
  • Upon completion of the course, participants will be able to:
  • understand wireline and mud log acquisition techniques,
  • grasp fundamental physics of log measurements and to perform log quality control,
  • perform basic log interpretation in order to identify and characterize reservoirs.
Course Content


8 hours

  • Seals and reservoirs.
  • Definition of main reservoir petrophysical and fluid properties (lithology, porosity, resistivity, saturation).
  • Fundamental equations for log interpretation in clean formations.
  • Measurement environment (drilling, borehole, invasion process).


12 hours

  • Mud logging and coring operations.
  • Wireline logging operations.
  • Well 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.


12 hours

  • 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.
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Ways & Means
  • The first 2 hours are dedicated to introducing agenda, methods and tools.
  • Specific needs and expectations of each participant are also assessed and discussed (MCQ and phone interview with the tutor).