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E-123 - Well Logging & Qualitative Log Interpretation

5 days GEO/LOGBASIC
Level
Foundation
Audience
  • Geoscientists and other E&P professionals interested in log acquisition and interpretation.
Purpose
  • This course provides an overview of main logging tools and proposes an insight into fundamental well log interpretation for reservoir identification and characterization.
Learning Objectives
  • Upon completion of the course, participants will be able to:
  • acquire the concepts of log interpretation (Archie formula, invasion),
  • review mud logging, coring and wireline logging techniques,
  • perform a quick-look interpretation to characterize reservoirs: fluid contacts, lithology, porosity, saturation.
Prerequisite
  • No prerequisites for this course.
Ways and means
  • Interactive presentations and exercises to build a lithology and fluid column.

Basic interpretation concepts 1 day
  • Definition of main reservoir petrophysical and fluid properties (lithology, porosity, resistivity, saturation).
  • Environment of measurement (borehole, invasion profile).
  • Fundamental equations (Archie formula) for log interpretation in clean formations.
Review of log measurements & applications 1.25 days
  • Mud logging and coring techniques - Mud logs and use in log interpretation.
  • Wireline logging operations and wireline logs.
  • Logging-while-drilling techniques and LWD logs.
  • Well logs: header, calibration, parameters, repeat section, main log.
  • Wireline logging tools: principle and applications, limitation, calibration, log correction and quality control.
  • Caliper, Gamma Ray and GR spectrometry, Spontaneous Potential.
  • Resistivity (Induction, Laterolog) and Micro-resistivity measurements.
  • Porosity & lithology measurements: nuclear (Litho-Density, Neutron) and acoustic logging (Sonic, Dipole sonic) .
  • Application on case studies.
“Quick-look” interpretation 2 days
  • Qualitative well-log interpretation
  • Log responses in most common geological formations.
  • Identification of reservoirs and fluid contacts (overlay technique: water- and oil-based mud cases).
  • Hydrocarbon effect on density & neutron logs.
  • Determination of water resistivity Rw (SP, Ratio, Rwa) and formation resistivity (Rt, Rxo).
  • Determination of lithology, porosity, water and hydrocarbon saturations.
  • Shale effects on logs: introduction to shaly and complex lithology formations.
  • Cross-plot techniques with density, neutron, sonic and other logs (Pe, K, Th, etc.).
  • Application on case studies.
Pressure measurements & fluid sampling 0.5 day
  • Pressure measurements and fluid sampling: operation and applications.
  • Determination of fluid contacts, fluid gradients and fluid densities.
NMR, dipmeter & borehole imaging techniques 0.25 day
  • NMR log (nuclear magnetic resonance): principle and applications.
  • Dipmeter and borehole imaging tools: principle and applications.
2017 course calendar
Language Dates Location Tuition Register
Jun 12 - 16 Rueil €3,030 Online By email
Sep 18 - 22 Rueil €3,030 Online By email