Water Production from Shale Oil and Gas Wells

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Water Production from Shale Oil and Gas Wells

  1. 1. Water production from shale oil and gas wells Bing Bai 8/12/2013
  2. 2. Outline • • • • • •
  3. 3. Wastewater characteristics • – – – – • – – – –
  4. 4. Wastewater production 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)
  5. 5. Wastewater production • • • • 0 10 20 30 40 50 60 70 80 90 100 10 15 20 25 30 Percentage,% Year Produced water Transition water Frac flowback water
  6. 6. Water recovery ratio
  7. 7. DJ basin water production prediction • • • • • •
  8. 8. • • • • • DJ basin water production prediction
  9. 9. Sources of variability in water production volumes
  10. 10. Sources of variability in water production • 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)
  11. 11. 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
  12. 12. • 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
  13. 13. Water production prediction tools
  14. 14. Water production prediction tool •
  15. 15. • Water production prediction tool

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