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E-221 - Quantitative Well Log Analysis

5 days RES/LOGADV
Level
Proficiency
Audience
  • Geoscientists and technicians having an experience in qualitative log interpretation and willing to perform quantitative reservoir evaluation.
Purpose
  • This course provides participants with some experience in qualitative log interpretation.
Learning Objectives
  • Upon completion of the course, participants will be able to:
  • perform sound quality-control and environmental correction of logs, determine Rt, Rxo, Di,
  • evaluate shale content of reservoirs, apply shale and hydrocarbon corrections,
  • perform quantitative log interpretation in case of water and oil based mud, determine porosity, permeability, net sand, net reservoir and net pay characteristics.
Prerequisite
  • Participants should know the principles and applications of common wireline logging tools and must be used to perform a quick-look (lithology, porosity, Rw, Sw).
Ways and means
  • Hand computations followed by petrophysical software sessions.

Preparation for quantitative log interpretation 1 day
  • Petrophysical concepts and relationships.
  • Quality control of the data.
  • Determination of geological formations and reservoirs - Zonations.
  • Environmental corrections of logs - Determination of Rt, Rxo, Di.
  • Case studies (water and oil based muds).
Interpretation of clean formations 1 day
  • Determination of fluid contacts (WOC, GOC).
  • Determination of matrix and fluid parameters, Rw (SP, Ratio, Rwa).
  • Determination of lithology, porosity, fluid type, water and hydrocarbon saturations.
  • Cross plots techniques: N-D-S, Pe-RHOB, K-Th, etc.
  • Case studies.
Quantitative log interpretation of shaly formations (deterministic approach) 2.5 days
  • Influence of shale on logging tool response - Introduction to complex lithology - D-N cross-plot.
  • Determination of shale parameters, shale content Vsh and effective porosity.
  • Hydrocarbon effects on logs and hydrocarbon correction.
  • Determination of water and hydrocarbon saturations (various equations).
  • Comparison of porosity and permeability results to core data (PHI-K relationship and SCAL).
  • Determination of net sand, net reservoir and net pay thicknesses and associated characteristics (Vsh, H, Phie, So).
  • Case studies: integration & interpretation of pressure tests and NMR data, if available.
  • Cross-section between wells and comparison of interpretation results.
Other interpretation methods 0.5 day
  • Introduction to the multi-mineral model and general optimization method.
  • Case study.
2017 course calendar
Language Dates Location Tuition Register
Jun 19 - 23 Rueil €3,150 Online By email
Sep 25 - 29 Rueil €3,150 Online By email