Evaluation of Water Resources for Hydraulic Fracturing in the Barnett Shale
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Evaluation of Water Resources for Hydraulic Fracturing in the Barnett Shale Mary Hingst GISWR Fall 2011
description
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 - PowerPoint PPT Presentation
Transcript of Evaluation of Water Resources for Hydraulic Fracturing in the Barnett Shale
Evaluation of Water Resources for Hydraulic Fracturing in the Barnett Shale
Mary HingstGISWR 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 Shale5,000 mi2Total NG volume estimated around 250 TCF
◦Recoverable 43 TCF About 1.315E15 kWh
Hydraulic Fracturing“Fracking” Increase permeability (“flow”) of formations
containing resources◦ Shales and mudrocks often contain a lot of
compartmentalized gas and oil in their poresFluids (primarily water) is pumped into an injection
well to increase pressure beyond rock strengthPropping agent then injected to keep fractures openOnce 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
Counties of Interest
Montague
Wise
Parker
Hood
How low must we go?Need to avoid the Trinity Aquifer
Trinity
Well Logs
Good Bad
Data
Depth to Water
Depth Below Surface to Water (ft)
txgridselectWat_Dpth
0
1 - 50
51 - 100
101 - 150
151 - 200
201 - 250
251 - 300
301 - 350
351 - 400
401 - 450
451 - 505
Specific Capacity (Pump Rate/Drawdown)
Specific Capacity (GPM/ft)txgridselectSpfc_Cap
0.000
0.001 - 0.250
0.251 - 0.500
0.501 - 0.750
0.751 - 1.000
1.001 - 1.500
1.501 - 2.000
2.001 - 5.000
5.001 - 30.000
Best Locations (actual data)
Best Locations
txgridselectTOT_RANK
0
1 - 45
46 - 75
76 - 80
81 - 90
91 - 100
101 - 110
111 - 120
121 - 130
Greater Number = Better
Conclusions and precautionsIf 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 dryWater may mix with Trinity AquiferIf you dig a hole, write down what you
find!
ResourcesTCEQ Water Well ReportsTexas Parks and Wildlife GIS Lab Map
DownloadsTexas Water Development Board GIS DataTexas Railroad CommissionUS Dept. of Energy, Energy Citations
Database – Mechanics of hydraulic fracturing
AAPG WebsiteUSGS (Barnett Shale info)
