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Evolution of the Williston Basin Drilling Pad ;. Drilling Pad. What affects a drilling pad Types of pads in North Dakota Advances in pad construction. What affects a drilling pad. Placement Geology Unit spacing Topography Protected Easements Road infrastructure - PowerPoint PPT Presentation
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Evolution of the Williston Basin Drilling Pad;
Drilling Pad
What affects a drilling pad
Types of pads in North Dakota
Advances in pad construction
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
Prehistoric Drilling Pad(pre 2000’s - 2011)
A thing of the PAST
Single Well Pad
Purpose:HBP and Test a spacing unit
Size: 300’x500’
Dual Well PadPurpose: Develop a single 1280 and minimize impact• Allows for full development with only
4 locations
Size: 300’x550’
Three Well Pad
Purpose: Develop a full 2560 acre spacing unit and minimize impact of foot print
Size: 395’x550’
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’
Eco Well Pad
10
Cyclone # 28
Multi Well Pad
Purpose:• Meet requirements for multiple
wells• Minimize impact• Overcome rough terrain, &
access issues (water)
Size: 6 - 14 Wells 550 x 750
Multi Well Pad
13
Cyclone #2
Total Footage: 79,521’ @ Day 80
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.
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.
2-Ply Wood Mats - OKAdvantages:• Less expensive• Available
Disadvantages:• Absorb Liquid• Damage Easily• Slip & trip
hazard when wet
Cost• $2.50 / sq. yd.
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.
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.
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.
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.