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Published byBethany Bridgwater Modified over 10 years ago
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Moving Beyond Misinformation: Education and Engagement
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The Process
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Misperception: Hydraulic Fracturing is Injecting Fluids into Groundwater
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Drilling Distance Wells Fargo Center ~700 ft 7000 ft. Aquifer 400-800 ft.
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Casing Multiple layers surrounding the aquifer Cement Conductor Casing Cement Surface Casing Drilling Mud/Cement Production Casing Production Tubing
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Surface Casing Purpose Protect ground water Provide stable wellbore during drilling operation Provide well control during drilling Depth Requirements Set by State and BLM regulations Extends below the aquifer Cement Helps Protect casing from corrosion Provide zonal isolation Support casing in wellbore
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Production Casing Purpose Provide zonal isolation Provide well control Well path to productive intervals Cement Requirements Set by State regulations Set by BLM regulations Operator requirements Cement Helps Protect casing from corrosion Support casing in wellbore
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Misperception: Hydraulic Fracturing is Not Engineered
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Fracture Design Data Required Petrophysics/Formation properties k, Φ, ν, E, σ, Pp, BHT Fluid properties Multitude of fluid types n’, K’, μ, break profile, Pf, Proppant properties Variety of proppant types β, sg, size, CD Predict-K 3.0
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Pump Schedule A pump schedule is required for the simulator to determine the predicted fracture geometry Fluid and proppant volumes Treatment rate Additive rates Frac Job
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Treatment Graph Frac Job
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Misperception: Drilling is Getting Riskier
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Fractured Contact
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Footprint 1 Well Pad or 32?
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Misperception: Drilling and Hydraulic Fracturing Uses Too Much Water
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Colorado Water Use Total (Million gallons/Day)Total (Billion gallons/Year) Irrigation (crop)12,3224497 Irrigation (golf course)4114 Public-supply864315 Domestic3412 Industrial14252 Livestock3312 Mining218 Thermo-electric12345 Total withdrawals13,5814957 Source: USGS 2005 Estimated Withdrawals and Use of Water in Colorado, 2005
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Horizontal Well Activity 2011 517 Horizontal wells permitted 2009-2011 220 Horizontal wells spud Example: 1,000 wells x 5M gal = 5B gal 0.11% of Colorado annual irrigation water use 0.10% of Colorado annual water use
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Estimate All Well Activity 2010 2098 wells completed 2011 Estimate Water Use 1000 horizontal wells (5M gal) 1500 vertical wells (1M gal) Conservative Estimate: 0.14% of Colorado annual irrigation water use 0.13% of Colorado annual water use
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Water Requirements Natural gas has one of the lowest water usage rates per MMBTU
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Misperception: There is No Data Showing Groundwater is Protected
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COGCC Groundwater complaints Hundreds of complaints No verified instances of hydraulic fracturing harming groundwater in Colorado Water sampling Since 2000, baseline and periodic water sampling for over 2,000 water wells in the San Juan Basin Independently verified; no significant increase in chemical concentrations
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Meaningful Engagement and Education
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FracFocus Website 23 http://fracfocus.brocodev.com/hydraulic-fracturing-process http://fracfocus.brocodev.com/
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HF Disclosure Example
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Baseline Water Sampling Pre and Post-drilling water samples taken around new well starts Increased transparency & accountability for industry
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COGA Fast Facts
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Resources Hydraulic Fracturing Fact Sheet COGCC Gasland Correction Document COGA’s The Truth About Gasland Other Fact Sheets Natural Gas Facts Socioeconomic Benefits Produced Water Natural Gas Supply www.coga.org
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Questions? Thank you for your interest in Colorado’s oil and gas industry! www.coga.org
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