Artificial Lift

ARTIFICIAL LIFT

PRESENTED BY :

ARSLAN JAVED EP010203 MSC Petroleum techs. FINAL Pet- 636University of Karachi.

NATURAL LIFT.There are basically six driving mechanisms that provide the naturalenergy necessary for oil recovery:

Rock and liquid expansion drive Depletion drive Gas cap drive Water drive Gravity drainage drive Combination driveArtificial Lift

Decreases backpressure against reservoir. pressure difference (draw-down) between reservoir and wellbore.PwfPhPrThe well:Flows if Pwf > Ph + Psurf

Dies if Ph + Psurf PwfP surfTypes of Artificial Lift

Jet PumpsGas LIFT

PCP

Beam Pumps

ESP

Comparative Study between the different lifting techniques SYSTEM

EFFICIENCY (%)ROD PUMP 30 40

GAS LIFT

25 32ELECTRIC SUBMERSIBLE PUMP ( ESP )50 - 60PROGRESSING CAVITY PUMP ( PCP )60 - 80JET PUMPING10 - 25HYDRAULIC PUMP30 - 40SYSTEM & EFFICIENCYChoice of Artificial LiftTotalOther7%Rod Pump64%Gas Lift19%ESP10%7Producing Oil Wells - TotalType of Well FSU ROW TotalRod Pump140,000475,000615,000Gas Lift 24,000155,000179,000ESP 63,000 30,000 93,000Other 23,000 40,000 63,000

Total250,000700,000950,000EARLY CONCEPT OF SUCKER ROD

NOW A DAYS

Rod Pumping (Nodding Donkey )AdvantagesLOW COST.Best understood by field personnel.Works in high temperatures.

10

GAS LIFTFor Deep Wells.

For off-Shore Wells.GAS LIFT ADVANTAGES

Electric submersible pump (ESP)