evolution of the williston basin drilling pad ;. drilling pad what affects a drilling pad types of...
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Evolution of the Williston Basin Drilling Pad;
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Drilling Pad
What affects a drilling pad
Types of pads in North Dakota
Advances in pad construction
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What affects a drilling padPlacement
• Geology
• Unit spacing
• Topography
• Protected Easements
• Road infrastructure
• Gathering infrastructure
• Flood potential
• Erosion control
• City / county / state regulation
Size
• Rig foot print• Number of wells• Battery size• Flare orientation• Panic line
distance• Topography• Necessary Frac
crew space• Solids control
plan
Construction
• Soil Moisture
• Number of wells on pad (Traffic Volume)
• Weather
• Seasonal consideration of operations
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Prehistoric Drilling Pad(pre 2000’s - 2011)
A thing of the PAST
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Single Well Pad
Purpose:
HBP and Test a spacing unit
Size: 300’x500’
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Dual Well PadPurpose: Develop a single 1280 and minimize impact
• Allows for full development with only 4 locations
Size: 300’x550’
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Three Well Pad
Purpose: Develop a full 2560 acre spacing unit and minimize impact of foot print
Size: 395’x550’
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Eco PadFour Wells
Purpose: Develop a full 2560 acre spacing unit & minimize foot print
Size: 395’x550’
SIMULTANEOUS OPERATIONS Four Well Eco Pad: 550’x700’
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Eco Well Pad
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10
Cyclone # 28
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Multi Well Pad
Purpose:• Meet requirements for multiple
wells
• Minimize impact
• Overcome rough terrain, & access issues (water)
Size: 6 - 14 Wells 550 x 750
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Multi Well Pad
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13
Cyclone #2
Total Footage: 79,521’ @ Day 80
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Lifecycle of Drilling Pads
Scoria – 2 yrs. – Avg. maintenance $5-7K / yr.
Gravel – 5 yrs. – Avg. maintenance $2-4K / yr.
Textile Reinforced – 7 – Avg. maintenance $1.5-3K / yr.
Cement Stabilized – 10 – Avg. maintenance $500-2000 / yr.
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Materials to Extend Lifecycle of Pads
2 ply wood mats: wood mats interlocking form surface on location
Composite mats: Composite mat systems form surface on location
Reinforced Geotextiles: High strength fabrics for separation & reinforcement of soil and aggregate
Geo Cell System: Plastic 3-D soil confinement system
Cement Stabilization: Blending cement with native soil to create a more durable surface.
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2-Ply Wood Mats - OK
Advantages:
• Less expensive
• Available
Disadvantages:
• Absorb Liquid
• Damage Easily
• Slip & trip hazard when wet
Cost• $2.50 / sq. yd.
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Composite Mats - Good
Advantages:
• Light weight, easy to move
• More durable
• Low or no work over pad cost when placed over surfacing
• Minimize days to sales
Disadvantages:
• Leasing - Mats not for sale
• Time to place on location
• High demand
Cost• $5.00 / sq. yd.
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Geotextiles - Good
Advantages
• One size fits all solution
• Deployed quickly
Disadvantages
• Not easily removed
• Difficult to “repair”
• Life and stability of material is dependant upon load size, traffic, water
Cost
• $4.00 – 7.00 / sq. yd.
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Geo Cell System - BetterAdvantages
• Reduce vertical and lateral movement
• Less surface material required
• Product life estimated 25 years
• Can be placed in low temps where cement cannot
Disadvantages
• Labor intensive to place
Cost• $7.50 – 10.00 / sq. yd.
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Cement Stabilization - BestAdvantages
• Reduces Trucking Impacts – Less surfacing material
• Harder sub-grade
• Lower maintenance
Disadvantages
• Must be placed in temps above 40°F
• Time for shipping and coordinating product
• Preplanning of battery, electrical, flow lines, etc.
Cost
• $7.50 – 10.00 / sq. yd.