Petrophysics, Quick Look and Log Quality Control
This course covers the following topics:
- Geology of Carbonates and Clastics
- Gamma Ray (GR) and Spontaneous Potential: Tool physics and applications to estimate clay volume, clay type and formation water salinities.
- Porosity and Lithology: Density and Neutron tool physics and applications
- Acoustics: Tool physics and applications for rock mechanics, well bore stability, and secondary porosity
- Resistivity Measurements: Tool physics of Shallow Rxo, Laterolog and Induction and High Technology resistivity tools.
- Introduction to High Technology Tools: NMR, Borehole Imaging, Dielectric and Wireline Formation Testing.
- Interpretations: This covers the evaluation of:
- Clay Volume (Vsh, Vcl),
- Estimating the parameters of “m” and “n” in the Archie Equation,
- Quick look techniques to estimate the oil/water, gas/water and oil/gas contacts, salinity estimations of formation water and filtrate water, and unmoved hydrocarbon zones
- Estimation of water saturations in shaly-sands.
Workshops: 1-2 hours daily of workshop examples
- Reservoir Rock; Life of a well
- Tool Conveyance, depth Control, filtrate Invasion profiling
- Basics of Logging, Log Quality Control
- GR Spectroscopy
- The Spontaneous Potential
- Acoustic Log, secondary porosity, rock mechanical properties and wellbore stability
- The density and photoelectric capture cross section
- The Neutron Log, neutron spectroscopy and sigma neutron capture cross-section
- Density-Neutron applications for lithology, shale volume and effective and total porositiesBasics of Resistivity and the Archie Equation
- The concept and applications of the Formation Factor (FF) as a variable –m emulator
- Resistivity measurements in the invaded zone (Rxo)
- Resistivity measurements in the uninvaded zone using Induction and Laterolog
- The concept and applications of laterolog and induction array resistivity measurements
- Introduction to High Technology Tools
- Dielectric measurements
- Magnetic Resonance Imaging and its applications
- Borehole imaging
- Interpretation overview of important petrophysics parameters
- Estimating fluid salinities-Porosity-Lithology
- Wettability and the saturation exponent (n)
- Estimation of the volume of shale
- Computing the values of Sw using different techniques in clean and shaly formations
This course will be suitable for all geoscientists and engineers who will benefit greatly from a strong foundation in petrophysics, logging tool physics and log interpretations. This course will also be particularly useful to all new hires who will be working in upstream domains.