Petroleum Production Operations Practice Test 7

1. In general, formation rocks are oil wet in nature.

True

False

2. What is the percentage of sand control by resin coated gravel without screens?

15%

75%

55%

3. What do you mean by a surfactant has a stronger affinity for oil?

Oil soluble

Water Wet

Oil wet

Water soluble

4. Why the pre-flush is required in resin consolidation?

Remove undesired material

Remove gas

Remove oil

To remove the packer

5. How does increased viscosity of the reservoir fluid result in the formation damage mechanism?

Results from an increase in water saturation or oil wetting of the rock

Results from emulsions or high-viscosity treating fluids

Results due to a decrease in gas saturation

Results from plugging of pore channels by induced or inherent particles

6. What is the formula for calculating the pressure drop as shown in the diagram below?

ΔP_s=141.2kh/qμBs

ΔP_s=161.2qμBs/kh

ΔP_s=161.2kh/qμBs

ΔP_s=141.2qμBs/kh

7. If the uniformity coefficient is greater than 10 then what does it signifies?

Sand is uniform and is described by D₄₀ size

Sand is non-uniform and is described by D₄₀ size

Sand is very non- uniform and is described by D₇₀ size

Sand is uniform and is described by D₁₀ size

8. What is the percentage of sand control by gravel pack?

55%

75%

15%

9. Along the United States Gulf Coast, which of the following clay percentage decreases at deeper (9000-10,000ft) depths?

Illite

Smectite

Chloride and kaolinite mixed layers

Montmorillonite

10. What is the approximate diameter of dehydrated clay?

400 Micron

40 Micron

4 Micron

1 4 Micron