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WorksheetsDrilling Engineering Knowledge
Total questions: 20
Worksheet time: 11mins
During drilling operation, which of these combinations best describe a potential kick?
Low shale density, High bottom-hole temperature, Increasing d-exponent
High shale density, High bottom-hole temperature, Decreasing d-exponent
Low shale density, High bottom-hole temperature, Decreasing d-exponent
High shale density, Low bottom-hole temperature, Increasing d-exponent
Repeat formation testers (RFT) can only work in a permeable formation?
True
False
After drilling, which well logging tool gives the most accurate result?
Resistivity log
Density log
Gamma ray log
Sonic log
What is the meaning of DST?
Drill stem test
Drill stem tool
Drill shale test
None of the options
What is bullheading?
Forcefully pumping heavy mud into the well to circulate out the influx
Pumping lower density mud into the wellbore
Increasing the pressure on the drill-pipe to maintain bottom-hole - pressure
Increasing the mud weight overbalance to maintain formation pressure
Which of these rocks acts as the best cap rock?
Evaporites
Limestone
Conglomerate
Basalt
What is the distinctive difference between a hard-shut-in and soft-shut-in procedure?
The magnitude of the formation pressure encountered
The operation of the BOP
The release of pressure buildup
The duration of operation
During offshore operations, the rig communicate with the well via?
Marine piping systems
Marine risers
Marine drill pipes
Which of these reasons is why drilling through the crest of a gas reservoir can be catastrophic?
Formation instability at the crest
High gas compressibility at the crest
Abnormal pressure due to reservoir structure
Abnormal pressure due to fluid density difference
A mud of weight of 12ppg can best be applied in which of these formations?
Pore pressure gradient = 10ppg, Fracture pressure gradient = 11ppg
Pore pressure gradient = 8ppg, Fracture pressure gradient = 10ppg
Pore pressure gradient = 10ppg, Fracture pressure gradient = 15ppg
Pore pressure gradient = 14ppg, Fracture pressure gradient = 16ppg
The density of a formation gotten from a MWD test is 2.75 gm/cc. If the formation extends 12,000ft from the surface to the top of the reservoir, calculate the overburden pressure acting on the reservoir.
14,290 psi
15,290 psi
12,390 psi
None of the options
Which drilling environment is more prone to Abnormal pressure zones?
Swamp
Offshore
Onshore
Which of these shows a correct casing setting order in a wellbore
conductor, intermediate, surface, production
conductor, surface, intermediate, production
surface, conductor, intermediate, production
surface, intermediate, conductor, production
What is the meaning of SCSSV?
Surface controlled subsurface valve
Subsurface controlled surface valve
Surface controlled shut-in valve
Subsurface controlled shut-in valve
Resistivity log data cannot be used as qualitative indicators of Abnormal pressure?
True
False
The ECD of a circulated mud is 15ppg. If the mud circulation is stopped, calculate the original mud weight. Assume well depth to be 1200ft, annular pressure loss =0.75ppg, drill pipe pressure loss = 0.25ppg
14.25 ppg
15.75ppg
14.75ppg
14ppg
The hoisting system does not include
Block and tackle system
Rotary system
Draw works
None of the options
Which of the following fluid requires a certain level of pressure gradient to induce flow in a pipe?
Bingham plastic model
Newtonian fluid model
Power law fluid
All of the options
Which type of BOP is capable of closing on any piece of equipment?
Shear ram
Pipe ram
Annular preventer
Blind ram
Which of the following is not a key rheological property of drilling fluids?
Yield point
Funnel viscosity
Plastic viscosity
Gel strength
