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B A S I C P E T R O P H Y S I C S
An outline of the full length Basic Petrophysics training course
follows. This course would normally take a relaxed 10 days, or a very
intensive 5 days. Note that this course is fully customisable to suit
client requirements.
What is Petrophysics?
• Detective Work!
• Why bother?
• Who Uses This Stuff?
• What do they want?
• Why do they want it?
• How is this stuff related?
• Porosity
• Permeability
• Water saturation
• FWL, OWC & GOC
• Drainage & Imbibition Capillary Pressure
• Shales and Effective & Total Porosity Systems
The Measurements
• From Drilling
• Rate of Penetration
• Gas shows
• Cuttings Descriptions
• Well Deviation
• From Wireline Measurements
• Gamma Ray
• Sonic
• Neutron
• Density
• NMR
• Resistivity
• Spontaneous Potential
• Image Tools
• Pressure Testers
• Seismic Velocity Surveys (WST, VSP)
• Sidewall Cores
• Cased Hole Logs
• Carbon/Oxygen (C/O)
• Pulsed Neutron (PNC)
• Cement Bond Logs
• Borehole Gravimeter
• Perforation
Measurement While Drilling (MWD or LWD)
• Gamma Ray
• Sonic
• Neutron
• Density
• NMR
• Resistivity
• Spontaneous Potential
Testing and Pressure Measurements
• DST’s
• Production Tests
• Pressure Build Ups & Horner Analysis
Coring and Core Analyses
• Why Core?
• Plugging
• The Measurements
• What measurements should we take?
• SCAL Plug Selection
Pre-Interpretation
• Depth-Matching
• Normalisation
• Log-Editing & Quality Control
• Borehole & Environmental Corrections
• Mud Parameters & Temperature
• Log Modelling
Interpretation
• Tram Tracks & Derailments
• Deterministic
• Probabilistic
• Porosity & Permeability
• Core Calibration
• Formation Water Resistivity
• Common Water Saturation Formulae
• Invaded Zone Information
• SCAL Interpretation
• NMR Interpretation
• Pressure Interpretation
• Image Log Interpretation
• C/O and PNC Log Interpretation
• Cement Log Interpretation
• Reconciliation of All Data
• Interval Selection
• Uncertainty!
• Documentation & Audit Trail!
Common Problems
• Identifying Reservoir
• Thin Beds
• Log-Core Mismatch
• Logs Missing or Incomplete
Time-Depth Conversion
• From Velocity Survey
• From Sonic Log
• What to Use?
Implementation in Modelling
• Saturation-Height Functions
• Reconciliation with Log Evaluation
• Implementation in Static Models
• Implementation in Dynamic Models
Summary
• The Basics Again
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