Q.1
Oil wetting a normally water-wet formation can reduce the permeability by an average of 40%.
  • a) True
  • b) False
Q.2
Corrosion inhibitors and surfactants are generally cationic surfactants.
  • a) True
  • b) False
Q.3
Which of the following is incorrect in the context of surfactant used in the oil and gas industry?
  • a) Most cationic surfactant oil wet sandstone
  • b) Most cationic surfactant oil wet sandstone
  • c) Most cationic surfactant destabilizes water in oil emulsions
  • d) Organic corrosion inhibitors are usually cationic surfactants
Q.4
Emulsion – blocking and water – blocking is usually not a problem in _____ reservoirs except during acidizing.
  • a) Sandstone
  • b) Shale
  • c) Evaporites
  • d) Limestone and Dolomite
Q.5
Which of the following is incorrect in the context of cationic surfactant used in the oil and gas industry?
  • a) Most cationic surfactant oil wet sandstone
  • b) Surfactants should always swell and shrink
  • c) Most cationic surfactant stabilizes water in oil emulsions
  • d) Organic corrosion inhibitors are usually cationic surfactants
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