southwestern energy presentation - hydraulic fracturing
DESCRIPTION
Hydraulic Fracturing - Technology Description by Southwestern EnergyTRANSCRIPT
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June 20, 2014
Mark K. Boling President
HYDRAULIC FRACTURING OPERATIONS:
SEPARATING FACT FROM FICTION
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Development Considerations
1
Surface Considerations
Subsurface Considerations
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Surface Considerations
2
Air Emissions
Water Use Water Handling Water Reuse & Disposal
Surface Impact • Drilling Locations • Truck Traffic & Road Damage • Infrastructure
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Subsurface Considerations
3
Protecting Underground Water Resources
Frac Fluid Disclosure
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Protecting Underground Water Resources
4
Well Integrity Is the Key!
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Well Integrity
5
Well Construction Standards 2 Evaluate Stratigraphic Confinement 1
Evaluate Mechanical Integrity of Well 3 Monitor Frac Job & Producing Well 4
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4000’ of Sediment
Surface Casing 550’
400’ Usable Fresh Water
2100’ Various Atoka Sands & Shales
1300’ Upper Hale
600’ Morrow Shale
Hindsville
300’ Fayetteville Shale
Evaluating Stratigraphic Confinement
6
Cross sectional view
Virtually all fresh water wells are less than 500 feet deep in the Fayetteville Shale area
Thousands of feet of rock separates the Fayetteville Shale from shallow, freshwater zones
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Evaluating Stratigraphic Confinement Shallow Wells and “Frac Hits”
7
850’
400’ Usable Fresh Water
300’ Fayetteville Shale
450’ Atoka Sands & Shales
Abandoned Well
Transmissive Fault
In most shallow formations (less than ~2,000’), the hydraulic fracture will propagate in a horizontal direction.
Cross sectional view
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FRESH WATER AQUIFER ZONE
SHALLOW PRODUCING ZONE
CONDUCTOR PIPE
SURFACE CASING
PRODUCTION CASING
TARGET PRODUCING ZONE
GOOD MECHANICAL INTEGRITY
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CEMENT CHANNELING
PRESSURE BUILDS UP
CONDUCTOR PIPE
SURFACE CASING
PRODUCTION CASING
FRESH WATER AQUIFER ZONE
SHALLOW PRODUCING ZONE
TARGET PRODUCING ZONE
CAS
ING
CEM
ENT
FOR
MAT
ION
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Surface Considerations
10
Air Emissions
Water Use Water Handling Water Reuse & Disposal
Surface Impact • Drilling Locations • Truck Traffic & Road Damage • Infrastructure
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Regulating Air Emissions
11
Reduction Technology • Catalytic reduction • Ultra-low sulfur diesel fuel • LNG and CNG fuels • Oxidation catalysts • Green completions, vapor recovery
units, low bleed/no bleed pneumatic devices, plunger lift systems, leak detection
Emission Type • NOx • SO2 • CO • Particulates • CH4 • VOCs (incl. BTEX)
Emission Levels • EPA • Industry • State regulators • Research groups
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Water Issues
12
Water Use Water Handling Water Reuse & Disposal
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13
US Shale Resources
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14
USA Baseline Water Stress
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Water Use Issues
15
Location, Rate & Timing of
Withdrawals Cumulative Impact
Assessment
15
Volumes Needed
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Water Handling
16
Trucks vs. Pipeline • Truck Traffic • Road Damage Impoundments vs. Tanks
• Closed-Loop Drilling Systems • Recycling Logistics • Air Emissions
Tracking Wastewater • Characterize Wastewater • Record Volumes Produced • Verify Volumes Delivered
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Water Reuse & Disposal
Water Recycling & Reuse • Volume and quality of wastewater • Chemical compatibility • Storage and transportation logistics
Water Treatment Facilities • Flowback & produced water
chemistry • Capacity & Capability limitations
(NORM, DBPs, heavy metals) • Central vs. drill site facilities
Water Disposal Wells
• Geological & hydrological limitations • NIMBY concerns • Triggered seismicity considerations
17
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25,000’
IGNEOUS BASEMENT
LIMESTONE
SHALE
TRIGGERED SEISMICITY WATER DISPOSAL WELL WATER DISPOSAL WELL HORIZONTAL SHALE WELL
SAND
The largest recorded seismic event generates the same amount of energy as would be released when dropping a gallon of milk from chest high to the floor.
EXISTING STRESS
NEW STRESS
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Surface Impact
19
Infrastructure • Compressors • Pipelines • Roads • Water treatment
facilities
Truck Traffic & Road Damage
Drilling Locations • Pit construction • Erosion and
sedimentation • Chemical storage
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June 20, 2014
Mark K. Boling President
HYDRAULIC FRACTURING OPERATIONS:
SEPARATING FACT FROM FICTION