When the well head Natural pressure drops, it’s time for artificial lift.
Oil reservoirs don’t produce indefinitely on their own. The first stage of oil production involves natural pressure, which makes crude extraction effortless. Subsequently, that pressure falls, flow reduces, and wells risk going quiet.
This is where artificial lift systems come into play. It ensures wells keep producing, and without them, oil trapped underground would remain unreachable.
The importance of these systems can be seen in industry projections. According to GMI Research, the Artificial Lift market will be valued at $10.7 Billion by 2032. This shows that Artificial lift systems have become as important as anything in modern oil production.
What Artificial Lift Means
Artificial lift means what it’s called. With crude oil, secondary recovery often entails the use of artificial lift. This requires the addition of energy to assist fluids flow upward, from sinking to surface.
Different wells require different solutions. Depth. Thickness of the fluids. Gas content. Rate of production. These factors determine which lift method is best.
One technology does not suit all. That is why there are various lift technologies. Each serves its niche.
Beam Pumps That Keep On Working
Beam pumps are an oil field staple. A surface pump jack moves up and down. A rod connects to an downhole pump at the end of the stroke to pump the fluid up to the surface.
They are dependable and easy to use. They are best in shallow to medium depth wells and in scenarios of viscous oil. They do require regular maintenance, but they are proven.
Electric Submersible Pumps for High Output Wells
Some wells demand more productive inflow. That is where electric submersible pumps stand out. A motor is situated near the bottom of the well and is connected to a multi-stage pump which applies strong pressure to push the fluids up.
They do deep wells and high volumes easily. Their lifespan can be shortened due to sand and heat, but in the right conditions, ESPs provide exceptional results.
Gas Lift Uses Gas to Move Oil
Gas lift takes a different approach. Compressed gas is injected into the well, lightening the fluid column so reservoir pressure can push everything upward.
This method is effective for offshore use and in wells that contain high gas content or have complicated well trajectories. There are fewer moving components which reduces the number of possible mechanical breakdowns. The downside is the requirement of a constant gas supply.
Progressing Cavity Pumps for Heavy Oil
Thick or heavy oil flows slowly. Cavity pumps work to fix this by employing a helical rotor that rotates and moves dense liquids upward.
They work to effectively handle sand, solid, and high viscosity oil. There are depth constraints, but in the case of heavy oil fields, PCPs are typically the optimal solution.
Hydraulic and Plunger Lift for Special Cases
In hydraulic lifting, produced fluid is lifted by fluid under pressure from deep or deviated wells. It is a flexible system, but very complex, and a continuous supply of lifting fluid is needed.
Plunger lift is less complex and is more economical. A plunger travels up the well, pushing liquid to the surface. It is effective in wells that are low in production and in wells that have high gas production.
How Artificial Lift Extends the Life of Wells
The real value of artificial lift is to keep wells alive longer.
It allows the re-opening of marginal wells that have been shut down. It keeps mature fields producing even when pressure drops. It helps horizontal and deviated wells overcome flow difficulties. It keeps heavy oil reservoirs in the productive stage.
Every additional barrel recovered adds value. Every additional year improves field economics.
Final Remarks
Today’s oil industry is more than just drilling. It’s about sustaining flow long after natural pressure has diminished. Artificial lift systems make that possible.
From beam pumps on land to ESPs offshore, every technology has its purpose in sustaining the flow of energy. As reservoirs age, the importance of artificial lift will only become more pronounced. Although wells may weaken over time, intelligent lift technologies will ensure that production does not.