Assessment Additives in Acidizing Fluids
1. What should be done to a new string of tubing before acidizing a well?
A .Circulate acid down the tubing and up the annulus.
B .Circulate acid down the annulus and up the tubing.
C .Pump acid down the tubing and then reverse circulate it out. ✔
2. Which iron is considered worse for the formation?
A .Ferrous
B .Ferric ✔
3. It is necessary to control leak off when acid fracturing.
A .True ✔
B .False
4. The bacterium causing the greatest concern to oil producers is the sulfate-reducing organism.
A .True ✔
B .False
5. Before selecting an acid mixture for a simulation treatment, it is important to test the mixture’s compatibility with which of these formation fluids:
A .Oil and water. ✔
B .Oil only.
C .Water only.
6. Which of these fluids is typically used in conjunction with clay-stabilizing materials to combat formation damage?
A .2% KCl
B .4% NaCl
C .3% NH4Cl
D .(A), (B) and (C) can all be used. ✔
7. Corrosion inhibitor is added to all acids before pumping into a well.
A .True ✔
B .False
8. Acid can break down some friction reducers.
A .True ✔
B .False
9. If left unchecked, ferric iron precipitates out of solution when ___________.
A .the pH decreases.
B .the pH increases. ✔
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