Transcript Slide 1
When you know the code the secret to enhanced wellbore integrity is revealed.
Enhancer 923 ™ Cement Agent
Cementing Challenges During Drilling
Formation Interaction Reduce/Eliminate Formation Damage That Can Reduce Recovery Reduce Fluid Losses to the Formation Prevent fluid influx from the formation (i.e. gas migration) Avoid possible communication in the annulus Free water on high side of deviated or horizontal wells Decrease the need for remediation due to cement fallback © 2010 Halliburton. All Rights Reserved.
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Cementing Challenges During Completion
Resist failure and maintain isolation throughout the high pressures of hydraulic fracturing and drawdown during production Control the direction of stimulation treatments Avoid communication between fractures Optimize fracture direction / placement Enhance control over fracture initiation so that placement and size reflect the stimulation design © 2010 Halliburton. All Rights Reserved.
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Cementing Challenges During Production
Withstand stress loads brought on by cyclic loading and/or annular deformation Prevent water cut Avoid reduction in hydrocarbon production Avoid management, treatment and disposal costs of unwanted produced water Avoid lost gas (gas wells) Contain gas in a manner that enables maximized extraction Avoid environmental hazards / operational issues © 2010 Halliburton. All Rights Reserved.
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Cement System with Enhancer 923™ Agent Key Attributes
Enhanced early compressive strength Greater free water control Reduced API fluid loss
Enhancer 923 agent is locally sourced requiring slurries engineered for location-specific applications.
© 2010 Halliburton. All Rights Reserved.
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Cement System with Enhancer 923™ Agent Early Compressive Strength Development
Conventional vs. with Enhancer 923 Cement Agent Comparison at 12 Hours Conventional 14.5 lb/gal With Enhancer 923 agent Conventional 13.8 lb/gal With Enhancer 923 agent 200 °F BHST 205 °F BHST Conventional 15 lb/gal With Enhancer 923 agent Conventional 14.2 lb/gal With Enhancer 923 agent Conventional 15.8 lb/gal With Enhancer 923 agent 102 °F BHST 177 °F BHST 175 °F BHST Conventional 13.2 lb/gal With Enhancer 923 agent 225 °F BHST 0 200 400 600 800 Pounds per Square Inch (PSI) 1000 1200
Enhancer 923 agent is locally sourced requiring slurries engineered for location-specific applications.
© 2010 Halliburton. All Rights Reserved.
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Fluid loss
Cement System with Enhancer 923™ Agent Decreased Free Water
Free Water Conventional Cement System vs. Cement System with Enhancer 923 Cement Agent Conv. Slurry 16.4 lb/gal Enhancer 923 Slurry 16.4 lb/gal 0 5 10 Milliliters 15 20 25
Enhancer 923 agent is locally sourced requiring slurries engineered for location-specific applications.
© 2010 Halliburton. All Rights Reserved.
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Cement System with Enhancer 923™ Agent Reduced Fluid Loss
Fluid loss API Fluid Loss Conventional Cement System vs. Cement System with Enhancer 923 Cement Agent Conv. Slurry 12 lb/gal Enhancer 923 Slurry 12 lb/gal Conv Slurry 13 lb/gal Enhancer 923 Slurry 13lb/gal 0 100 200 300 Fluid Loss: cc/30 min.
400 500 600
Enhancer 923 agent is locally sourced requiring slurries engineered for location-specific applications.
© 2010 Halliburton. All Rights Reserved.
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Cement System with Enhancer 923™ Agent Field Comparison
Previous Tight Gas Cementing Solution Lead Density = 12.5 lb/gal Yield = 1.95 cu.ft/sk Water Requirement = 10.62 gal/sk Tail Density = 13.5 lb/gal Yield = 1.7 cu.ft/sk Water Requirement = 8.06 gal/sk Lab Results-Previous Solution Free Water 0% at 45o angle (lead & tail) Fluid Loss 930 API (lead) 219 API (tail) Compressive Strengths @ 170 o F 24 hr = 255 psi (lead) 72 hr = 637 psi (lead) 24 hr = 796 psi (tail) 72 hr = 1433 psi (tail) Cement System with Enhancer 923 Agent* 25% Enhancer 923 Agent by weight in the slurry Lead & Tail are same density Yield = 2.49 cu.ft/sk to 1.96 cu.ft/sk Water Requirement = 13.96 gal/sk to 9.96 gal/sk Lab Results – 12 lb/gal Cement System with Enhnacer 923 Agent* Free Water 0% at 45o angle (12 lb/gal and 13 lb/gal) Fluid Loss 117 API (12 lb/gal) 129 API (13 lb/gal) Compressive Strength @ 170 o F 24 hr = 470 psi (12 lb/gal) 72 hr = 721 psi (12 lb/gal) 24 hr = 740 psi (13 lb/gal) 72 hr = 1120 psi (13 lb/gal)
*Results are from the total cement system design, a design that included Enhancer 923 agent. Enhancer 923 agent is locally sourced requiring slurries engineered for location-specific applications.
© 2010 Halliburton. All Rights Reserved.
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Cement System with Enhancer 923™ Agent Field Comparison
Previous Slurry Rheologies 80 ° F
RPM
600 300 200 100 60 30 6 3 Agent Slurry Rheologies* 80 ° F
RPM
600 300 200 100 60
Dial RPM
36 600 20 300
Dial
54 130 ° F
RPM
600 32 300 18 200 22 200 14 100 14 100 14 60 10 60 13 30 8 30 12 6 5 6 11 3 5 3 30 6 3
Dial
23 10 8 7 6 6 5 4
A single cement blend with Enhancer 923 Agent replaces two-stage cementing RPM
130 ° F 600 300 200 100 60 30 6 3
Dial RPM
95 600 85 300 83 200 78 100 69 60 63 30 27 6 16 3
Dial
35 21 18 17 17 17 9 7
A single cement blend with Enhancer 923 Agent replaces two-stage cementing Dial
52 28 21 13 9 6 3 1
RPM
170 ° F 600 300 200 100 60 30 6 3
RPM
170 ° F 600 300 200 100 60 30 6 3
Dial RPM
132 600 131 300 119 200 112 100 106 60 62 30 20 6 15 3
Dial
43 32 28 26 26 25 17 12
A single cement blend with Enhancer 923 Agent replaces two-stage cementing Dial
58 33 24 15 10 7 2 1
*Results are from the total cement system design, a design that included Enhancer 923 agent. Enhancer 923 agent is locally sourced requiring slurries engineered for location-specific applications.
© 2010 Halliburton. All Rights Reserved.
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Previous Tight Gas Slurry – Static Gel Strength (SGS) Development – Field Data
© 2010 Halliburton. All Rights Reserved.
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Cement System with Enhancer 923 ™ Agent –12 lb/gal Static Gel Strength (SGS) Development – Field Data 600 500 400 300 200 100 0
0:00:00 0:18:00 0:36:00 0:54:00 1:12:00 1:30:00 1:48:00 2:06:00 2:24:00 3:04:00 3:22:00 3:40:00 3:58:00
Time
*Results are from the total cement system design, a design that included Enhancer 923 agent. Enhancer 923 agent is locally sourced requiring slurries engineered for location-specific applications.
© 2010 Halliburton. All Rights Reserved.
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Cement System with Enhancer 923 ™ Thickening Time – Field Data Agent –12 lb/gal
*Results are from the total cement system design, a design that included Enhancer 923 agent. Enhancer 923 agent is locally sourced requiring slurries engineered for location-specific applications.
© 2010 Halliburton. All Rights Reserved.
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Previous Tight Gas Slurry – Field Data
© 2010 Halliburton. All Rights Reserved.
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Cement System with Enhancer 923™ Agent Field Data
*Results are from the total cement system design, a design that included Enhancer 923 agent. Enhancer 923 agent is locally sourced requiring slurries engineered for location-specific applications.
© 2010 Halliburton. All Rights Reserved.
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Cement System with Enhancer 923™ Agent Benefits
Improves performance with light-weight slurries Lower Specific Gravity Higher Surface Area Enhanced Slurry Stability Cost efficient, higher performing slurries Single bulk blends Field-adjustable density for lead and tail slurries Can eliminate use of two-stage tools reducing cost and risk
Enhancer 923 agent is locally sourced requiring slurries engineered for location-specific applications.
© 2010 Halliburton. All Rights Reserved.
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Cement System with Enhancer 923™ Agent Field Results
Challenge: Tight Gas wells / Colorado Avoid gas migration issues common to conventionally cemented wells in the area Dramatically improve cement bond logs over previously logged wells in the area Solution: Deliver a fine-mesh slurry with Enhancer 923 Agent Achieved early compressive strength eliminating gas channeling Results: Cost savings of ~US$60K Single-stage cementing operation eliminated the need for a stage tool Excellent cement bond logs indicated no voids from gas flow, improved bonding to casing and the formation
Enhancer 923 agent is locally sourced requiring slurries engineered for location-specific applications.
© 2010 Halliburton. All Rights Reserved.
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Cement System with Enhancer 923™ Agent Field Results
Challenge: Coalbed Methane (CBM) / New Mexico Weak zones above and below the CBM seam Avoid common need for remedial services in the area due to cement fall back after achieving top of cement Solution: Cement System with Enhancer 923 Agent Control over fluid loss Immediate gel strength Results: Remedial cementing was eliminated Cement bond logs significantly improved over conventionally cemented offset wells
Enhancer 923 agent is locally sourced requiring slurries engineered for location-specific applications.
© 2010 Halliburton. All Rights Reserved.
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Cement System with Enhancer 923™ Agent Advantages Summarized
Cost efficient higher performing light-weight slurry Lightweight cement optimized for low-temperature compressive-strength enhancement Can enhance static gel strength development Increased free-water control & reactivity due to high surface area of the cement particles Lower Specific Gravity Higher Surface Area Fewer sacks blended on location Compatible with all: Currently used cementing additives Classes of Portland cement or commonly used ASTM cements One system blend Single slurry design with field-adjustable densities for lead and tail slurries can replace two-stage cementing Eliminates the need for a two-stage tool
Enhancer 923 agent is locally sourced requiring slurries engineered for location-specific applications.
© 2010 Halliburton. All Rights Reserved.
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Cement System with Enhancer 923™ Agent Key Attributes
Enhanced early compressive strength Greater free water control Reduced API fluid loss
Enhancer 923 agent is locally sourced requiring slurries engineered for location-specific applications.
© 2010 Halliburton. All Rights Reserved.
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