Well Logging & Basic Log Interpretation (BL)METH/BLWLI

Who should attend?

  • This course provides a practical understanding of basic concepts and methodology of well log acquisition and interpretation for subsurface and reservoir studies.
Audience :
  • Geologists, geophysicists, reservoir engineers interested in well log interpretation.

Level : Foundation

Course Content

  • BASIC INTERPRETATION CONCEPTS

      • 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).
  • MEASUREMENTS & APPLICATIONS

      • 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.
  • BASIC LOG INTERPRETATION

      • 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.

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.

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).