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PETE 2031 LSU (ACTUAL 2025/2026) EXAM 1
QUESTIONS AND VERIFIED ANSWERS
put fine sand in a jar of water and shake it up - which particles will settle first
(small, large, no difference)? - (answers)large particles
petroleum engineers are mostly concerned with _____ rocks (rock type) -
(answers)sedimentary
sorting occurs during _____ - (answers)sedimentation
Organics --> kerogen --> bitumen --> liquid petroleum (and/or graphite and
methane) - (answers)creation of hydrocarbon
what fluids are in reservoirs today - (answers)water, oil, gas
"water" is _____, either from seawater or fresh followed by chemical
dissolution/precipitation - (answers)brine
during the formation of _____ _____, silts and clays sediment in low energy
waters along with plant matter. Under anaerobic conditions, bacteria break the
oxygen bonds not the C-C bonds. - (answers)source rock
migration out of source rock - (answers)primary migration
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migration into a trap - (answers)secondary migration
what is it called when buoyance separates gas, oil, and brine -
(answers)separation
what is the approximate density of brine? - (answers)1.3 g/cm3
what is the approximate density of oil? - (answers)0.8 g/cm3
what is the approximate density of water - (answers)1 g/cm3
pressure in reservoirs _____ with depth - (answers)increase
what quantifies the increase in pressure with depth (think simple) -
(answers)pressure gradient
a combination of fluid static pressure and lithostatic pressure -
(answers)overburden pressure (Po)
pressure build up if fluid cannot escape - (answers)abnormal pressure
A material that undergoes continuous deformation when exposed to a shear
stress - (answers)fluid
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liquids are sometimes called "_____" (hint: compresibility) -
(answers)incompressible
All _____ media are porous - (answers)permeable
All permeable media are _____ - (answers)porous
not all _____ media are permeable - (answers)porous
not all porous media are _____ - (answers)permeable
porosity is reported as a _____ or _____ - (answers)fraction, percent
porosity is associated with _____ _____ - (answers)storage capacity
what are a couple of factors that affect porosity? - (answers)grain size
distribution, grain shape, settling and compaction, reactions during diagenesis
Fraction of the pore volume occupied by a phase - (answers)saturation
most generic sand porosity (in case it isn't given, assume this) - (answers)36% or
0.36
PETE 2031 LSU (ACTUAL 2025/2026) EXAM 1
QUESTIONS AND VERIFIED ANSWERS
put fine sand in a jar of water and shake it up - which particles will settle first
(small, large, no difference)? - (answers)large particles
petroleum engineers are mostly concerned with _____ rocks (rock type) -
(answers)sedimentary
sorting occurs during _____ - (answers)sedimentation
Organics --> kerogen --> bitumen --> liquid petroleum (and/or graphite and
methane) - (answers)creation of hydrocarbon
what fluids are in reservoirs today - (answers)water, oil, gas
"water" is _____, either from seawater or fresh followed by chemical
dissolution/precipitation - (answers)brine
during the formation of _____ _____, silts and clays sediment in low energy
waters along with plant matter. Under anaerobic conditions, bacteria break the
oxygen bonds not the C-C bonds. - (answers)source rock
migration out of source rock - (answers)primary migration
,2|Page
migration into a trap - (answers)secondary migration
what is it called when buoyance separates gas, oil, and brine -
(answers)separation
what is the approximate density of brine? - (answers)1.3 g/cm3
what is the approximate density of oil? - (answers)0.8 g/cm3
what is the approximate density of water - (answers)1 g/cm3
pressure in reservoirs _____ with depth - (answers)increase
what quantifies the increase in pressure with depth (think simple) -
(answers)pressure gradient
a combination of fluid static pressure and lithostatic pressure -
(answers)overburden pressure (Po)
pressure build up if fluid cannot escape - (answers)abnormal pressure
A material that undergoes continuous deformation when exposed to a shear
stress - (answers)fluid
, 3|Page
liquids are sometimes called "_____" (hint: compresibility) -
(answers)incompressible
All _____ media are porous - (answers)permeable
All permeable media are _____ - (answers)porous
not all _____ media are permeable - (answers)porous
not all porous media are _____ - (answers)permeable
porosity is reported as a _____ or _____ - (answers)fraction, percent
porosity is associated with _____ _____ - (answers)storage capacity
what are a couple of factors that affect porosity? - (answers)grain size
distribution, grain shape, settling and compaction, reactions during diagenesis
Fraction of the pore volume occupied by a phase - (answers)saturation
most generic sand porosity (in case it isn't given, assume this) - (answers)36% or
0.36
