gas lift

))ومن يتوكل على الله فهو حسبه((

1ENG.MOHAMMED SALAH

ENG.MOHAMMED SALAH 2

*When an oil well ceases to flow naturally or uneconomical production .(drawing IPR)

There are two methods of artificial lifting;

1 -sucker rod pump2 -jet pump

3 -ESP (electrical submersible pump)4 -PCP (progressive cavity pump)


*


*Example show how can gas lift increase production Well tbg 2 7/8” at 5000 ft

, PI=0.5 ,

GLR 300 cuft/bbl -What will be flow rate if Pr= 1400 , 1350 , 1300

psi

Solution

AOF=pr*PI= 0.5* (1400,1350,1300)=(700,675,600)

Then draw IPRENG.MOHAMMED SALAH 12

*Then from gilbert charts , at pwh= 100 psi , draw VLP


Q Eq. of THP Eq. of pwf Pwf

50 500 5500 1250

100 700 5700 1150

200 800 5800 1050

400 800 5800 975

600 800 5800 910

*


*As from Gilbert chart used 300 cuft/bbl , but if we use optimum GLR


Q Optimum GLR

Eq. of pwh 100

Eq of pwf pwf

50 8.8 5000 10000 230

100 6.3 4000 9000 270

200 4.3 3400 8400 320

400 3.25 2200 7200 380

600 2.4 1800 6800 430

*


Optimum GLR

Q

GLR

*


Will produce

475 bbl/day

*


Optimum GLR with 475

bbl/day is 2.9 mscf/bbl

Q

GLR

So at optimum required 2.9 mscf/bbl to produce475 BPDTotal daily volume of gas =2900*475Daily vol. from formation =300*475Need volume of gas = 475*2600

= 1.235*10^6 scf

Also need pressure 400 psi to over come pwf


*



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