gas-lift well

Incorrect. While gas injection does affect pressure, the primary principle is to reduce the fluid column density.

Correct! Gas injection decreases the density of the fluid column, driving it upwards.

Incorrect. Gas injection does not increase fluid viscosity.

Incorrect. While gas injection can create pressure differences, it does not create a vacuum.

Incorrect. The Gas Lift Valve controls the flow of gas into the annulus.

Correct! Injection valves regulate the amount of gas injected at different intervals.

Incorrect. Tubing carries produced fluids.

Incorrect. The Gas Source provides the gas for injection, but doesn't control its flow.

Incorrect. While intermittent gas lift can save on gas usage, it's not always the more cost-effective option overall.

Incorrect. Both types of gas lift have their own applications.

Correct! Intermittent gas lift allows for periods of gas injection and production, conserving gas and optimizing lift efficiency.

Incorrect. Both systems require regular maintenance.

Incorrect. This is a major challenge, as obtaining and handling gas can be costly.

Incorrect. Wellbore integrity is essential to prevent gas leakage and ensure efficient operation.

Incorrect. High-pressure gas handling requires specialized equipment.

Correct! Gas lift actually helps maintain reservoir pressure, promoting efficient recovery.

Incorrect. Gas lift is itself an artificial lift method.

Correct! Gas lift maintains pressure in the reservoir, improving recovery.

Incorrect. All wells require regular maintenance.

Incorrect. Gas lift has specific applications, not all reservoirs are suitable.

Here are some factors that might influence the decision to implement gas lift, along with explanations:

• Reservoir characteristics: * Reservoir Pressure: Low reservoir pressure is a primary indicator for gas lift. If the pressure is too low for natural flow, gas lift can be a solution. * Fluid Properties: The type of fluid (oil, gas, or water) and its viscosity will impact the effectiveness of gas lift. Gas lift is generally more suitable for oil and gas wells. * Reservoir Size and Geometry: The size and geometry of the reservoir can influence the feasibility and efficiency of gas lift.
• Wellbore Conditions: * Wellbore Integrity: A wellbore with good integrity is necessary to prevent gas leakage and ensure efficient operation. * Wellbore Depth: Deeper wells require higher gas injection pressures, which could increase costs and operational complexity.
• Economics: * Gas Availability and Cost: The availability and cost of gas for injection are key factors. If gas is readily available and cost-effective, gas lift becomes more attractive. * Project Costs: The initial investment for installing a gas lift system, including equipment and labor, needs to be weighed against potential production increases. * Operational Costs: Ongoing costs associated with gas handling, injection, and maintenance need to be considered.