Powder River Basin Wyoming Produced CBNG Water Summary

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Powder River Basin WyomingProduced CBNG Water
Summary
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Perspective
Powder River Basin EIS analyzed and disclosed the
environmental impacts of drilling 51,000 CBNG
wells over a 10 year period.

• 25,169 CBNG wells completed (60,126 APDs
  approved)
• Since 2001, average of 74,900 ac/ft of water
  produced each year.
• Storage capacity of Lake Mead
  35,000,000 ac/ft

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PRB Produced Water Volumes
PRB FEIS States that 4 of the PRB groundwater
will be produced with CBNG.
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Historic CBNG Produced Water Management
Strategies(Federal Minerals)

• Direct Discharge to Drainage 30
• Discharge to Full Containment 19
• Discharge to Unlined Impoundments 33
• Injection 4
• Active Treatment (RO, EMITS, etc,) 10
• Land Application Disposal (LAD) 3

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Example Water Analyses
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Beneficial Use
Wyoming State Engineers Office requires CBNG
Operators to obtain a permit to appropriate
groundwater with the beneficial use being the
production of methane. After 3 years, the
water/gas ratio must not exceed 10 bbl/mcf of gas
produced to maintain compliance.
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Direct Discharge to Drainage
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Discharge to Infiltration Impoundments
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Livestock Operations
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Stock Watering
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Land Application Disposal

• The disposal of CBNG water using irrigation,
• with or without soil amendments. Most
  applications are
• seasonally limited.
• Misting
• Surface Irrigation
• Center Pivots
• Side Rolls
• Subsurface Irrigation

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Misting
Seasonal
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Land Application Disposal
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Subsurface Drip Irrigation
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Subsurface Drip Irrigation
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Dust Control
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Active Treatment
EMITs Ion Exchange
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Thats All Folks!