Drilling Engineering Knowledge

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