STOR

Which recovery method is characterized by utilizing naturally existing reservoir pressure to drive oil towards the wellbore?

• Enhanced Oil Recovery (EOR)

• Secondary Recovery

• Waterflooding

• Primary Recovery

Secondary recovery techniques, like waterflooding, are implemented when natural reservoir pressure is insufficient to sustain economic oil production, aiming to displace remaining oil.

• True
• False

What is the primary goal of Enhanced Oil Recovery (EOR) techniques?

• To extract the 'easy' oil that flows naturally.

• To reduce the cost of primary recovery.

• To increase the viscosity of the oil.

• To recover oil left behind after primary and secondary methods.

Define Improved Oil Recovery (IOR) and how it differs from Enhanced Oil Recovery (EOR).

Evaluate responses using AI:

OFF

In the context of hydrocarbon recovery, waterflooding falls under the category of ______ recovery methods.

During waterflooding, what causes the oil to be swept toward the producing wellbore?

• The natural pressure of the reservoir rock

• The decrease in water density

• The increase in oil viscosity

• The flow of water through the formation

Match each type of oil recovery with its typical oil recovery percentage range:

• Less than 30%

• Primary Recovery

• Greater than 50%

• Secondary Recovery

• 30-50%

• Tertiary Recovery

Which of the following is a key objective of waterflooding in oil reservoirs?

• To increase volumetric sweep efficiency

• To increase gas saturation in the oil

• To decrease the reservoir pressure

• To increase oil viscosity

Injecting water below a VRR of 1 is often due to issues like water unavailability and surface constraints.

• TRUE

• FALSE

What happens to oil viscosity as pressure decreases below the bubble point?

• Increases linearly

• Increases sharply

• Decreases rapidly

• Remains constant