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Professional Engineering Exam - Petroleum Engineering Questions And Answers 2025
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Professional Engineering Exam - Petroleum Engineering Questions And Answers 2025
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Terms in this set (100) Q&AProfessional Engineering Exam -
Petroleum Engineering Questions And
Answers 2025
Absolute Volume (Cementing) - volume of cement itself only
Active Solids - hydrate or chemically have the potential to react within the
mud system
Additive for Density Reduction (Cementing) - Additive SG
bentonite 2.65 (add 0.053% H2O for each 1%)
diatomaceous 2.10
gilsonite 1.07
,Terms in this set (100) Q&A
perlite 2.2
Additives for Density Increase (Cementing) - Additive SG
hematite 5.02
ilmenite 4.67
barite 4.23
Advantages of Horizontal and Vertical Separators - Horizontal:
- Better Separation (no countercurrent)
- Better foam handling (more bubble surface area)
Vertical:
- Better solids control (solids on bottom easier to remove)
- Better motion handling (small horizontal handling)
- Better surge protection (liquid level change no effect on gas capacity)
API & ISO Casing Connections - Long Round threads and couplings (LCs)
Buttress threads and couplings (BCs)
Extreme line threads and couplings (XCs)
API & ISO Threads - Round (8 round threads/inch; 8-round; 3/4 in/ft taper)
Buttress (rectangular; high tensile strength seal at face)
XC (integral joint; box machined into pipe for reduced OD)
,Terms in this set (100) Q&A
API Filter Press - API standard equipment that measures relative filtrate
volume
static filtration theory: Vf increases as sqrt(t)
Vf from 0 to 7.5 minutes equals Vf from 7.5 to 30 minutes (if no Vsp - Spurt
Volume)
To avoid Vsp: Vf @ 30 min can be calculated from doubling Vf @ 7.5 to 30
minutes
API Filter Press Area: 45 cm^3
API Filter Press Pressure: 100 psia = 6.8 atm
API High Pressure / High Temperature Filter Pressure - Used for high
pressure / high temperature conditions
Double V30 answer if from HTHP filter (Half area used)
Use normal Vsp for calculation, but if asking for it individually, double
API Joints - Threaded & Coupled T&C (pin-pin with coupling)
Integral Joint (box thickened or swaged for larger OD)
, Terms in this set (100) Q&A
Flush Joint (box OD = pipe OD)
Asphaltenes - Asphaltenes precipitate within reservoir: pressure decrease,
or oil, injected solvent mix
Asphaltenes precipitate near wellbore: drilling, completion, acid, fracs, etc.
Heavier crudes have less Asphaltenes-precipitation problems than lighter
crudes
Primary production has maximum Asphaltenes near saturation pressure
Asphaltenes precipitation/deposition envelope (APE) depends on both
pressure & temperature
APE: region Asphaltenes precipitation occurs
Asphaltenes & Waxes - Deposited solids: asphaltenes, waxes, or a mixture
(with resins, crude oil, fines, scale, water)
Characteristics: light C6 fraction (with N2, CO2, H2S); heavy end C6
Backpressure Equation - a non-linear IPR for gas but works for saturated
oil wells
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