28 Questions
Which drive mechanism is primarily used for gas reservoirs?
Pressure depletion
What is the purpose of tertiary recovery in reservoir development?
To increase the reservoir's energy
Which method is NOT used in tertiary recovery?
Horizontal wells
Which factor is associated with viscous fingering at high Mobility ratios?
Mobility = 2.4
What is the recovery factor range for gas cap drive?
20-50%
What is the main challenge in gas field development?
Sustainable plateau production rate
What is the recovery factor range for water drive?
35-75%
What is the recovery factor of the largest Norwegian oil fields on average?
47%
What does the gas formation volume factor (BG) represent?
Reservoir volume to surface volume ratio
Which recovery mechanism requires communication with an aquifer?
Water drive
What is the primary recovery factor range for solution drive?
5-30%
What is the main challenge in oil reservoir primary recovery?
Depletion drive
What is the recovery factor range for primary recovery in oil reservoirs?
47%
What is the compressibility comparison between gas and water?
Gas compressibility is lower than water
What does tertiary recovery involve?
Changing flow paths and fluid properties of the reservoir
What is the primary recovery mechanism used in the largest Norwegian oil fields?
Water drive
What does the gas formation volume factor (BG) measure?
The volume in barrels that one standard cubic foot of gas occupies as free gas in the reservoir
What is the primary recovery factor range for water drive?
50-60%
What is the primary recovery factor range for solution drive?
5-30%
What is the main challenge posed by the low permeability of gas reservoirs?
Hindering efficient gas extraction
What is the aim of tertiary recovery in reservoir development?
To improve sweep efficiency by injecting additional fluids or energy into the reservoir
What is the primary recovery mechanism associated with gas cap drive?
Expanding the gas cap as the reservoir is produced, pushing oil towards the production wellbore
What is the primary recovery mechanism associated with pressure depletion?
Utilizing the natural pressure of the reservoir to drive gas to the surface
What is the primary recovery factor range for water drive?
50-60%
What is the primary recovery factor range for water drive?
50-60%
What is the primary recovery factor range for water drive?
50-60%
What is the primary recovery factor range for water drive?
50-60%
What is the primary recovery factor range for water drive?
50-60%
Study Notes
Gas Reservoir Development and Drive Mechanisms
- The gas formation volume factor (BG) measures the volume in barrels that one standard cubic foot of gas occupies as free gas in the reservoir, typically around 1000 rbl/scf.
- Kinsale gas field, which has produced over 2 TCF of gas, is being considered as a potential CO2 sequestration and green hydrogen storage site.
- Pressure depletion is commonly used for primary recovery in gas reservoirs, utilizing the natural pressure of the reservoir to drive gas to the surface.
- The primary recovery factor range for water drive is typically between 50-60%, achieved through water injection to displace oil and improve recovery.
- Low permeability of gas reservoirs poses a significant challenge in gas field development, hindering efficient gas extraction.
- Water drive requires a reservoir in communication with an aquifer to provide the bulk of the energy for driving gas to the surface.
- The primary recovery factor range for solution drive is typically 5-30%.
- Viscous fingering at high Mobility ratios is associated with the mobility ratio in gas reservoirs.
- The primary recovery factor range for water drive is 35-75%.
- Gas cap drive, associated with pressure depletion, expands the gas cap as the reservoir is produced, pushing oil towards the production wellbore.
- Tertiary recovery in reservoir development aims to improve sweep efficiency by injecting additional fluids or energy into the reservoir.
- Depletion drive is commonly used for oil reservoirs with an initial gas cap, involving the expansion of the gas cap to enhance the drive mechanism.
Test your knowledge of gas reservoir development and drive mechanisms with this quiz. Explore concepts such as pressure depletion, water and solution drive, gas cap drive, and tertiary recovery factors. Learn about challenges and strategies for efficient gas extraction in low-permeability reservoirs.
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