The document discusses technologies for re-fracturing drilled but uncompleted wellbores to access stranded hydrocarbons. It describes how existing wells that were inadequately completed 10 years ago can be re-stimulated using modern completion methods like reduced stage spacing, treating untreated rock between old stages, and perforations in new locations to maximize resource recovery. A case study from the Eagle Ford showed that re-fracturing a well with over 50% more fluid and proppant, closer stage spacing and additional perforations led to a 10x increase in oil production from the re-stimulated portion of the wellbore.

1. 1
Game Changing Completion
Technologies

2. PROVIDING VALUE THROUGH TECHNOLOGY
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MAXIMIZE EUR
for all wells
OPTIMIZE
Resource consumption
SAFE
Reliable
Efficient
Vision: Global leader in revitalizing wellbores

3. REFRAC WELLS 2018
Understanding, Potential & Success
Drilled-but-Uncompleted
Wellbores
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• Most existing wells have potential
• Previously inadequate completion’s
• Cluster / Stage spacing
• Poor hydrocarbon flow from matrix
• Treatment fluid
• Formation / proppant damage
• Geomechanics
• Proppant
• Proppant transport during stimulation
• Mesh size & volumes
• Success criteria
• Targeted isolation / focused energy
• Application of moderns completion
methods

4. REFRAC WELLS 2018
Current Technologies
Drilled-but-Uncompleted
Wellbores
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• Pump & Pray
• Pump as fast as possible & pray
• Precise placement uncontrolable
• Additional perforations may not accept treatment
• Diverters
• Designs - at perforations / far field
• Divert between existing stages
• New perforation stimulation unpredictable
• Difficult to override Geo-mechanics
• Scab liners
• Permanent reduction in well I.D.
• Mechanical isolation methodology
• Push / pull / twist
• Difficult to transmit forces downhole or onto lateral

5. Breathe New Life into Old Wells
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6. REFRAC WELLS 2018
10 Years makes a world of difference
Drilled-but-Uncompleted
Wellbores
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2008 COMPLETION
2018 COMPLETION
Stranded
Hydrocarbons
Stranded
Hydrocarbons
Stranded
Hydrocarbons
Stranded
Hydrocarbons

7. REFRAC WELLS 2018
Eagleford Re-Frac
Drilled-but-Uncompleted
Wellbores
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• Reduced stage-spacing with perforations between old
stages
• Treating untreated rock – accessing stranded hydrocarbon220 ft110 ft110 ft
New
Perforation’s
Old
Perforation’s

8. REFRAC WELLS 2018
Eagleford Re-Frac
Drilled-but-Uncompleted
Wellbores
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ISIP
Consistent with shut in pressure from initial completion
Tool
Activation
ISIP
Similar
to original frac
Tool
Reset

9. REFRAC WELLS 2018
Eagleford - Results
Drilled-but-Uncompleted
Wellbores
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Original Frac COMITT Re-Frac
Fluid Volume 35 bbls/ft 50 bbl/ft
Proppant Volume 500 lbs/ft 1000 lbs/ft
Stage spacing 220 ft 110 ft
• All treatments placed successfully
• Up to 170,000 lbs of sand placed into a single cluster
• Pump rates of up to 18 BPM
• Treatment response evidenced that previously untouched rock was
stimulated
• WHP increased from 0 psi pre-job to 1,400 psi post treatment
• 10x increase in oil production pre-stim/post-stim from refractured
portion of the lateral

10. REFRAC WELLS 2018
Breath New Life Into Old Wells
Drilled-but-Uncompleted
Wellbores
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11. EXCITEPIERCE
COMPLETE
TECHNOLOGY SOLUTIONS TO INCREASE
ECONOMIC LIFE-TIME OF YOUR WELL
COMITT WELL SOLUTIONS LLC 1411 Vander
Wilt Ln, Katy, TX 77449 www.comitt.net

12. COMITT WELL SOLUTIONS LLC 1411 Vander
Wilt Ln, Katy, TX 77449 www.comitt.net
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