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Waterflood Performance

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Questions and Answers

Which factor is NOT a major determinant of areal sweep efficiency?

Total volume of fluid injected (correct)

Pattern type

Fluid mobility/mobility ratio

Areal heterogeneity

Which factor is NOT a major determinant of vertical sweep efficiency?

Total volume injection (correct)

Degree of gravity segregation

Vertical heterogeneity

Fluid mobilities/mobility ratio

Which flood pattern requires a smaller number of injection wells and is recommended for high aquifer fields?

External Water Injection (correct)

Five spot

Peripheral Injection Patterns

Regular Injection Patterns

Which of the following is a key difference between Improved Oil Recovery (IOR) and Enhanced Oil Recovery (EOR)?

IOR methods focus on supplementing reservoir forces and energy, while EOR refers to the recovery of oil left behind after primary and secondary recovery methods Signup and view all the answers

What is the main objective of waterflooding in oil recovery?

To maintain reservoir pressure Signup and view all the answers

What is the Voidage Replacement Ratio (VRR) used for in waterflooding?

To balance the injection and production rates at reservoir conditions Signup and view all the answers

Which type of recovery targets immobile oil that cannot be produced due to high capillary, IFT, or wettability?

Enhanced oil recovery (EOR) Signup and view all the answers

What is the most common technique used in secondary oil recovery when there is insufficient underground pressure to move the remaining oil?

Waterflooding Signup and view all the answers

What does EOR stand for in the context of oil recovery?

Enhanced oil recovery Signup and view all the answers

Which of the following injection patterns is similar to the five spot but with an extra injection well drilled at the middle of each side of the square?

Nine spot Signup and view all the answers

What is the difference between normal and inverted well arrangements in terms of injection wells per pattern?

Normal well arrangements have four injection wells per pattern, while inverted well arrangements have one injection well per pattern. Signup and view all the answers

Which injection pattern is typically used in gas injection projects?

Crestal injection Signup and view all the answers

What is the purpose of waterflooding performance monitoring?

To modify the original waterflood design and operating guidelines based on field production data. Signup and view all the answers

What modifications can be made to improve the performance of waterfloods?

All of the above. Signup and view all the answers

In which type of oil fields has waterflooding been used successfully?

Both offshore and onshore oil fields Signup and view all the answers