Lithology and Petrophysics Quiz

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.