ARTIFICIAL LIFT OIL AND GAS PDF
A vast majority of the oil and gas wells around the world require artificial lift technology to maintain and maximize production. Our unmatched portfolio of efficient. Plunger lift is a cost-effective, completely rigless solution to deliquify gas wells to maintain stable gas production, as well as to enhance production in oil wells. Predicting changes occurring in the oil well conditions can be difficult in an artificial lift operation. As the reservoir in the well is depleting, the characteristics also.
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Artificial Lift | Schlumberger
Good data are required for a complete present-value analysis, and these data are not always broadly available. Environmental and geographical considerations may be overriding issues. For example, sucker-rod pumping is, by far, the most widely used artificial lift method in onshore US operations.
However, in a densely populated city or on an offshore platform with 40 wells in a very small deck area, sucker-rod pumping might be a poor choice.
Also, deep wells producing several thousands of barrels per day cannot be lifted by beam lift; other artificial lift oil and gas must be considered.
Drives for artificial lift
Such geographic, environmental, and production considerations can limit the choices artificial lift oil and gas only one method of lift; determining the best overall choice is more difficult when it is possible to apply several of the available lift methods.
Artificial lift method selection should be a part of the overall well design. Once the method is selected, the wellbore size required to obtain the desired production rate must be considered.
Many times, a casing program has been designed to minimize well-completion costs, but it is later artificial lift oil and gas that the desired production could not be obtained because of the size limitation on the artificial lift equipment.
This can lead to an ultimate loss of total reserves. Even if target production rates can be achieved, smaller casing sizes can lead to higher long-term well-servicing problems.
If oil prices are low, it is tempting to select a small casing size to help with current economics. Obviously, wells should be drilled and completed with future production and lift methods in mind, but this is often not the case.
Reservoir pressure and well productivity Among the most important factors to consider when selecting an artificial lift system are current and future reservoir pressure and well productivity.
If producing artificial lift oil and gas or liquid rate is plotted X axis against producing bottomhole pressure BHP [Y axis], one of two inflow performance relationships IPR usually is seen.
Above the bubblepoint pressure, the liquid rate vs. Below the bubblepoint pressure, a relationship similar to that described by Vogel  occurs.
ESP is a very versatile artificial lift method and can be found in operating environments all over the world.
They can be artificial lift oil and gas to handle contaminants commonly found in oil, aggressive corrosive fluids such as H2S and CO2and exceptionally high downhole temperatures. Increasing water cut has been shown to have no significant detrimental effect on the ESP performance.
It is possible to locate them in vertical, deviated, or horizontal wells, but it is recommended to deploy them in a straight section of casing for optimum run life performance.
Artificial lift -
Although latest developments are aimed to enhance the ESP capabilities to handle gas and sand, they still need more technological development to avoid gas locks and internal erosion. This delivers a complete downhole system booster or back up - downtime is minimal, workovers artificial lift oil and gas less and there are savings in other operational areas.
ESP Dual Systems bring a significant enhancement of well profitability.
Gas Lift[ edit ] Gas lift is another widely used artificial lift method. As the name denotes, gas is injected in the tubing to reduce the weight artificial lift oil and gas the hydrostatic columnthus reducing the back pressure and allowing the reservoir pressure to push the mixture of produce fluids and gas up to the surface.
Gas lifts can cope well with abrasive elements and sand, and the cost of workover is minimum.