1. Water production from shale
oil and gas wells
Bing Bai
8/12/2013

2. Outline
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3. Wastewater characteristics
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5. Wastewater production
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1400
1600
1 51 101 151 201 251 301 351
WaterProduction,bbl
Time, days
Produced water (>164 days)
Transition water (31-163 days)
Frac Flowback (<30 days)

6. Wastewater production
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10 15 20 25 30
Percentage,%
Year
Produced water
Transition water
Frac flowback water

7. Water recovery ratio

8. DJ basin water production prediction
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DJ basin water production prediction

10. Sources of variability in water
production volumes

11. Sources of variability in water production
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0
200
400
600
800
1000
1200
1400
1600
1 51 101 151 201 251 301 351
WaterProduction,bbl
Time, days
Produced water (>164
days)
Transition water (31-163
days)
Frac Flowback (<30 days)

14. Time period
Water production
(bbl)
Water production volume
per stage
(bbl/stage)
Two tail t-test
(p value)
Long Normal Long Normal
Frac flowback 26130 13420 690 670 0.71
Transition water 14750 8340 390 420 0.66
Produced water 6520 3540 170 180 0.52
Total 47400 25300 1250 1260 0.51
Sources of variability in water production

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Sources of variability in water production
0
200
400
600
800
1000
1200
1400
1 6 11 16 21 26 31 36 41 46 51 56 61 66 71 76 81 86
Waterproduction,bbl
Time,days
Recycled
Non-recycled
Time period
Recycled/Fresh Blend (1/7)
(bbl)
Fresh Water
(bbl)
Two tail t-test
(p value)
Frac flowback 7620.32 8281.41 0.63
Transiton water 1783 1984.87 0.52

17. Water production prediction tools

18. Water production prediction tool
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Water production prediction tool