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E-221 - Quantitative Well Log Analysis

E-221 - Quantitative Well Log Analysis

5 days
RES/LOGADV
Sessions
Dates Location Tuition Register
Sep 24 - 28, 2018 Rueil 3,150 €
Online By email
Who should attend?

Audience

    • Geoscientists and technicians having an experience in qualitative log interpretation and willing to perform quantitative reservoir evaluation.

Level

  • Proficiency
  • 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.
Course Content

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.
Ways & Means
  • Hand computations followed by petrophysical software sessions.