WorksheetsPre-Quiz Pore Pressure and Geomechanics
Total questions: 10
Worksheet time: 5mins
What is hydrostatic pressure definition?
Hydrostatic pressure is the pressure exerted by the weight of column of fluid.
Hydrostatic pressure is the pressure exerted by the weight of static column of fluid.
Hydrostatic pressure is the pressure exerted by the weight of rock matrix.
What is overburden stress?
The stress exerted by the weight of overlaying sediments (include fluid and air).
The stress equal with the weight of overlaying sediments.
The stress due to matrix of overlaying sediments.
What is the difference pressure and stress?
Pressure is scalar quantity and stress is tensor quantity.
Pressure in PSI and stress in Mega Pascal.
No difference between pressure and stress.
What is overpressure?
The pressure equals with the normal hydrostatic pressure.
The pressure excess over the normal hydrostatic pressure.
The pressure less than the normal hydrostatic pressure.
What is normal compaction trend in pore pressure definition?
Theoretical curve that tries to model the porosity evolution on a zone.
Theoretical curve that tries to model the sonic trend on a zone.
The sonic trend that tries to model the porosity evolution on a zone.
What is effective stress?
Pore pressure = Vertical stress
Pore pressure - Vertical stress
Vertical stress - Pore pressure
What is fracture pressure?
The pressure is required to initiate a fracture in the rock.
The strongest points are related to rock strength.
Lower pore pressure ≠ lower overburden stress.
Calculate the pressure exerted by a 1500 m fluid column (density: 1.07 g/cc)?
157.4 bars equivalent to 2282 psi.
140.5 bars equivalent to 2038 psi.
200.8 bars equivalent to 2912 psi.
What is indirect values data source for pressure (exclude)?
Seismic Velocities.
Wireline Formation Tester.
Gas Detection, Mud Weight & Drilling Parameters.
You are told that the normal hydrostatic pressure is 360bars at 3500m. This means that the average fluid density in g/cc is:
1.30 g/cc
1.15 g/cc
1.05 g/cc
