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E-123 - Well Logging & Qualitative Log Interpretation

E-123 - Well Logging & Qualitative Log Interpretation

5 days
GEO/LOGBASIC
Sessions
Dates Location Tuition Register
Sep 17 - 21, 2018 Rueil 3,030 €
Online By email
Who should attend?

Audience

    • Geoscientists and other E&P professionals interested in wireline log acquisition and well-log interpretation.

Level

  • Foundation
  • 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),
  • to review mud logging, coring and wireline logging techniques,
  • to perform a quick-look interpretation to characterize reservoirs: fluid contacts, lithology, porosity, saturation.
Course Content

BASIC INTERPRETATION CONCEPTS & WIRELINE LOG RECORDING

1 day

  • Foundational concepts. Reservoir petrophysics (lithology, porosity, resistivity, saturation) and fluid properties.
  • Environment of measurement (borehole, invasion profile) and related parameters.
  • Fundamental equations (Archie formula) for log interpretation in clean formations.
  • Mud logging, measurements during drilling, coring and wireline logging techniques. Applications.
  • Well logs examples.

REVIEW OF LOG MEASUREMENTS & APPLICATIONS

1.25 days

  • 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, limitations, calibration, environmental corrections 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).
  • 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), formation resistivity (Rt, Rxo) and flushed zone diameter.
  • Determination of lithology, porosity, water and hydrocarbon types and saturations.
  • Cross-plot techniques with density, neutron, sonic and other logs (Pe, K, Th, etc.).
  • Shale effects on logs: introduction to shaly and complex lithology formations.
  • Application on case studies.

PRESSURE MEASUREMENTS & FLUID SAMPLING

0.5 day

  • Pressure measurements and fluid sampling: operation and applications.
  • Pressure analysis: determination of fluid contacts, fluid gradient and fluid density.

NMR, DIPMETER & BOREHOLE IMAGING TECHNIQUES

0.25 day

  • NMR log (Nuclear Magnetic Resonance): principle and applications.
  • Dipmeter and borehole imaging tools: principle and applications.
Ways & Means
  • Interactive presentations and exercises to build a lithology and fluid column.