Transcript The Effect of Condensate Banking on Production

Fracture
Technologies
The Effect of Condensate
Banking on Production
FracTech Work Shop
June 2003
Condensate Banking
(From a fracturing point of
view)
Fracture
Technologies
• For some time the fracturing industry has realized that
condensate has an adverse effects on well productivity
• In some cases, fracturing was applied to overcome
condensate banking around the well, with some
success
• However, either with un-fractured wells, or with
fractured wells condensate banking is seldom
modelled or considered in frac design
WellWhiz Models
Fracture
Technologies
Rel Perm
Fracture
Technologies
Condensate effects on 1.50 mD reservoir
Fracture
Technologies
Gas rates
Condensate rates
Frac Lf=200 ft-16/20 3 Lb/ft2
Fracture
Technologies
Fracture
Technologies
Time =0
Condensate Banking
Fracture
Technologies
Condensate Saturation after 212 days
Fracture
Technologies
Zoomed
Fracture
Technologies
Condensate in the frac
Gas Rate (unfractured), K=10 mD
Fracture
Technologies
K=10 mD, 16/20 3 Lb/ft2
Fracture
Technologies
Cumulative
Rate
K=10 mD, 20/40 1 Lb/ft2
Cumulative
Rate
Fracture
Technologies
Fracture
Technologies
Cumulative Production (BCF)
Frac Quality
Gas Prod.
(Condensate
banking)
POOR FRAC
(1 Lb/ft2 20/40)
6.80
GOOD FRAC
(3 Lb/ft2 16/20)
8.80
Fracture
Technologies
Conclusions
• Condensate banking can now be modelled
• Condensate banking necessitates fracture
design with TSO and large proppants
• Condensate banking will have an effect on
proppant flow back due to multi-phase effects