The Effect of Condensate Banking on Production

1
The Effect of CondensateBanking on Production

• FracTech Work Shop
• June 2003

2
Condensate Banking (From a fracturing point of
view)

• 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

3
WellWhiz Models
4
Rel Perm
5
Condensate effects on 1.50 mD reservoir
Gas rates
Condensate rates
6
Frac Lf200 ft-16/20 3 Lb/ft2
7
Condensate Banking
Time 0
8
Condensate Saturation after 212 days
9
Zoomed
10
Condensate in the frac
11
Gas Rate (unfractured), K10 mD
12
K10 mD, 16/20 3 Lb/ft2
Cumulative
Rate
13
K10 mD, 20/40 1 Lb/ft2
Cumulative
Rate
14
Cumulative Production (BCF)
15
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