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Evaluation of Water Resources for Hydraulic Fracturing in the Barnett Shale

Evaluation of Water Resources for Hydraulic Fracturing in the Barnett Shale. Mary Hingst GISWR Fall 2011. Answering the ultimate question of geology…. Where to dig a hole?. The Barnett Shale. Taken from the AAPG website. Gas Production in the Barnett Shale. 5,000 mi 2

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Evaluation of Water Resources for Hydraulic Fracturing in the Barnett Shale

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  1. Evaluation of Water Resources for Hydraulic Fracturing in the Barnett Shale Mary Hingst GISWR Fall 2011

  2. Answering the ultimate question of geology…. Where to dig a hole?

  3. The Barnett Shale Taken from the AAPG website

  4. Gas Production in the Barnett Shale • 5,000 mi2 • Total NG volume estimated around 250 TCF • Recoverable 43 TCF • About 1.315E15 kWh

  5. Hydraulic Fracturing • “Fracking” • Increase permeability (“flow”) of formations containing resources • Shales and mudrocks often contain a lot of compartmentalized gas and oil in their pores • Fluids (primarily water) is pumped into an injection well to increase pressure beyond rock strength • Propping agent then injected to keep fractures open • Once gas or other resource is extracted, the fracturing fluid rises towards surface from pressure of formation • Mismanagement of the treatment and disposal of these fluids along with the potential of methane seepage into aquifers have made ‘fracking’ controversial

  6. Counties of Interest Montague Wise Parker Hood

  7. How low must we go? • Need to avoid the Trinity Aquifer Trinity

  8. Well Logs Bad Good

  9. Data

  10. Depth to Water

  11. Specific Capacity (Pump Rate/Drawdown)

  12. Best Locations (actual data) Greater Number = Better

  13. Conclusions and precautions • If you want a shallow hole dig in Montague, but if you want more water, dig in Hood. • Given the amount of missing data, well logs may not be the most accurate • Missing data may show better results in Parker • Old wells may now be dry • Water may mix with Trinity Aquifer • If you dig a hole, write down what you find!

  14. Resources • TCEQ Water Well Reports • Texas Parks and Wildlife GIS Lab Map Downloads • Texas Water Development Board GIS Data • Texas Railroad Commission • US Dept. of Energy, Energy Citations Database – Mechanics of hydraulic fracturing • AAPG Website • USGS (Barnett Shale info)

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