The Technology of Artificial Lift Methods vol 1
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An engineer has two common methods of artificial lift to choose from — gas lift and pumping. The engineer will determine the optimum artificial lift method, depending on the well location, production rate and characteristics of the fluids being produced. Under this method, gas from an outside source is injected into the wellbore. This reduces the weight of the fluids in the wellbore and reduces the pressure needed to allow the fluids to flow up to the surface.
Gas lift works for a wide range of production rates, anywhere from 50 to 50, barrels of oil per day. However, gas lift is not very effective or efficient if the production rate or reservoir pressure gets too low.
When this occurs, other artificial lift methods must be utilized. The second method for artificial lift involves pumping. Examples are a rod pump, an electrical submersible pump and a hydraulic pump. If you have visited or lived in oil producing regions, you are already familiar with rod pumping systems.
A rod pump utilizes equipment on the surface — the big metal horsehead pumping units bobbing in a field. To understand how a rod pump works, think about the needle and syringe when you got your last flu shot. When you fill a syringe with medicine, you put the needle into the medicine bottle and pull up on the plunger inside the barrel of the syringe.
That sucks the medicine out of the bottle and up into the barrel of the syringe. The same thing happens with a rod pump as the horsehead goes up and down. A rod pump works very efficiently on wells with low production rates, anywhere from 1 to about 3, barrels of oil per day. An electrical submersible pump, referred to as an ESP, involves installing a long, skinny electric motor with a protector into the wellbore. A pump is stacked onto the top of the electric motor and the unit is screwed into the bottom of the tubing string to reach the produced fluids. Select the flow regime.
Gas Lift Volume 1
Refer to Fig. Determine slip velocity. If separate calculations are made for oil and for water as if they were flowing alone, the distance calcu lated is 1, ft. In working this problem for 2 in, tubing, the same proce dure was followed and a Ah of 2, ft was found when using the average oil-water mixture properties and a ah of 2, ft was found when calculations were made for water and oil as if they were flowing alone. Read Free For 30 Days. Description: Reservoir engineering description, with formula and index.
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PEH:Artificial Lift Systems - PetroWiki
Related titles. Carousel Previous Carousel Next. Brow 1. Brown, K. Kermit E. Brown - Overview of Artificial Lift Systems. Jump to Page. Search inside document. Calculate slip velocity, Vs Region lI : S 6. PLtTL 1. Loh Chun Liang.