5 Questions
What do Petrophysics & Log Analysis measure in terms of rock properties?
Density and Neutron
How is Water Saturation defined in the context of rock analysis?
The fraction of pore space occupied by water
What property does Permeability quantify in a rock formation?
Ability of fluid to flow through the rock
How are Porosity and Resistivity related in rock analysis?
They have an empirical correlation in core analysis
What is the significance of Reservoir Bed Thickness & Net Pay in relation to rock formations?
Show the amount of fluids that can flow within the rock
Study Notes
Petrophysics & Log Analysis
- Lithology is the study of the type of rock.
- Log measurements include: • GR (Gamma Ray) • Neutron • Density • Photoelectric • Resistivity
- Cuttings analysis and core analysis are used to examine the rock.
Porosity
- Porosity is the amount of pore space in the rock.
- Log measurements that help determine porosity include: • Neutron • Density • Sonic • NMR
- Core analysis is also used to determine porosity.
Water Saturation
- Water saturation is the fraction of the pore space occupied by water.
- It is determined by combining: • Porosity • Resistivity • Lithology
Permeability
- Permeability is the quantity of fluid that can flow as a function of time and pressure.
- It is measured using: • Formation testing • NMR logs
- Empirical correlation to porosity can also be used.
- Core analysis is used to determine permeability.
Reservoir Bed Thickness & Net Pay
- Reservoir bed thickness is the thickness of the rock with enough permeability to deliver fluids to a well bore.
- Net pay is the rock with enough permeability to deliver fluids to a well bore.
Test your knowledge on petrophysics, log analysis, and rock types including important aspects like porosity, water saturation, and permeability. Questions may cover log measurements, core analysis, and formation testing.
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