STRAT OIL QUIZ

What is the primary purpose of fault seal analysis?

• Predicting seismic wave velocities

• Evaluating if faults act as barriers or conduits to fluid flow

• Estimating hydrocarbon reserves

• Mapping surface topography

Why is fault seal analysis critical in hydrocarbon exploration?

• To calculate drilling costs

• To ensure faults act as traps for hydrocarbons

• To identify geothermal resources

• To measure reservoir temperature

Which parameter quantifies the clay content in a fault zone?

• API gravity

• Shale Gouge Ratio (SGR)

• Porosity-permeability index

• Young's modulus

How can CO₂-induced geochemical alterations affect fault seal integrity in CCS?

• Precipitation of minerals always strengthens the seal

• Dissolution of carbonate minerals may increase fault permeability*

• Geochemical changes have no long-term impact

• CO₂ increases clay content in faults

What does a high Shale Gouge Ratio (SGR) indicate?

• Low sealing potential

• High fault permeability

• Strong sealing potential

• High reservoir porosity

Juxtaposition sealing occurs when:

• Fault gouge is rich in quartz

• Reservoir rocks align against non-reservoir rocks

• Stress direction parallels the fault

• CO₂ dissolves in brine

Which method evaluates the continuity of clay layers along a fault?

• Membrane Seal Capacity (MSC)

• Clay Smear Potential (CSP)

• Seismic inversion

• Net-to-gross ratio

Fault seal analysis helps prevent:

• Overpressure in drilling mud

• Compartmentalization of reservoirs

• CO₂ mineralization

• Seismic acquisition errors

A fault with low SGR is likely to:

• Trap hydrocarbons effectively

• Act as a migration pathway

• Increase reservoir porosity

• Reduce geomechanical stress

Which factor is NOT used in fault seal analysis?

• Fault throw

• Capillary entry pressure

• API gravity of oil

• Clay content