Quantitative Well Log AnalysisRCM/LOGADV

Who should attend?

  • This course provides participants with some experience in qualitative log interpretation.
Audience :
  • Geoscientists and technicians having an experience in qualitative log interpretation and willing to perform quantitative reservoir evaluation.

Level : Proficiency

Course Content

  • PREPARATION FOR QUANTITATIVE LOG ANALYSIS

      • 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

      • 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)

      • 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

      • Introduction to the multi-mineral model and general optimization method.
      • Case study.

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.

Ways & Means

  • Hand computations followed by petrophysical software sessions.