Hydraulic Fracturing Challenges

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Robust Subsurface Performance

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Dr. Hanafy is a research scientist for the oil and gas division at Pilot Chemical Company. He holds a B.Sc. and an M.Sc. in Chemical and Nuclear Engineering from Cairo University in Egypt and a Ph.D. in petroleum engineering from Texas A&M University in the USA. Before joining Pilot, he worked as a drilling engineer in North Africa for a major oil service company and as an assistant lecturer at the British University in Egypt. His research focus is on hydraulic fracturing, acidizing, formation damage, and oilfield chemicals for conventional and unconventional reservoirs.


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Ahmed Hanafy, Ph.D.

Research Scientist

Pilot® FR Slurry Application

Pilot® FR Slurry is intended for use in hydraulic fracturing applications between 0.25 and 3.0 gallons per thousand gallons of frac fluid (gpt). Water quality, sand schedule, and formation response typically dictate an optimized FR concentration. Early frac stages (toe stages) should remain more conservative, with higher concentrations, than middle and late stages closer to the heel stages. Pilot® FR Slurry can be added into the blender tub or injection side of the blender unit on-site. However, injection in through the discharge side of the blender unit will result in a less sheared system, and typically will give better performance. Pilot® FR Slurry can be used during coiled tubing and drillout operations, at similar concentrations.

Subsurface Performance Challenges

  • Lack of performance with different water sources and high TDS 
  • Incompatibility with hydraulic fracturing chemistries 
  • Piping and wellhead tree exceed safety ratings 
  • Early screenout due to inability to place proppant according to schedules
  • Lack of product stability under harsh conditions 
  • Excess surface equipment failures 
  • Requirement of additional surface equipment and lack of on-the-fly addition 
  • Inconsistent performance

Operational Challenges

Why Pilot® FR Slurry?

Flexible Surface Handling

Builds viscosity and provides proppant carrying capacity

Quicker inversion capacities in a wide range of chemistries

High stress tolerance over time 

Enhanced maximum friction reduction

Compatible with hydraulic fracturing additives

Stable at challenging storage conditions:up to 135°F and down to -5°F for 6 months

Specifications

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Friction Reduction vs. Time

Flow loop testing commonly provides an early indication of performance in the field.

Figure A shows a standard commercially available high viscosity friction reducer and Pilot® FR Slurry-HV in tap water in a flow loop running at 5 gpm under turbulent flow. The graph illustrates that the Pilot® FR Slurry-HV solution provides both superior inversion and greater overall friction reduction, which translates directly to better field performance. 

Fig. A shows percentage of friction reduction versus time for Pilot® FR Slurry-HV against commercial HVFR product

High Stability

Figure B depicts Pilot™ FR Slurry resistance to phase separation, a common issue in this class of product. The image on the right shows  Pilot™ FR Slurry after subjecting it to heating at 135°F for three days, compared to a commercial product on the left. The  Pilot™ FR Slurry is highly stable to this accelerated environmental testing.

Fig. B shows Pilot™ FR Slurry suspension capability after three days at 135°F versus a commercial FR slurries.

Superior Viscosity

Figure C shows a viscosity comparison between Pilot™ FR Slurry and a standard commercially available friction reducer; both are measured in tap water after blending in a Waring blender at a high shear rate for 2 minutes. At both low and high loading, Pilot™ FR Slurry exhibits high viscosity, which translates to better proppant carrying capacity. 

Figure D shows a viscosity comparison between Pilot™FR Slurry-HV and a standard commercially available high viscosity friction reducer; both are measured in tap water after blending in a Waring blender at a high shear rate for 2 minutes. The Pilot™ FR Slurry-HV exhibits a similar viscosity response to the commercial HVFR.

Figure C shows Pilot™ FR Slurry’s superior viscosity versus a commercial FR fluid. Both FRs mixed in tap water at the same conditions.

Figure D shows Pilot™ FR Slurry-HV’s viscosity versus a commercial HVFR fluid.

Better Carrying Capacity

Figure E shows a proppant carrying capacity comparison between the Pilot™ FR Slurry-HV and a standard commercially available high viscosity friction reducer;  both are measured in tap water after blending in the Waring blender at a high shear rate for 2 minutes. The Pilot™ FR Slurry-HV shows better proppant carrying capacity, which translates to less screen out potential.

Fig. E shows Pilot™ FR Slurry-HV’s enhanced proppant carrying capacity compared to a commercial invert emulsion HVFR

Explore

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Friction Reducer Slurries for Efficient Hydraulic Fracturing

Pilot® FR Slurry friction reducers provide superior inversion and high overall friction reduction, which translates directly to better field performance.

Want to Learn More? 

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Friction Reducer Slurries for Efficient Hydraulic Fracturing

Pilot® FR Slurry friction reducers provide superior inversion and high overall friction reduction, which translates directly to better field performance.

Request a SampleDownload Data SheetsDownload Brochure

Download the Oil & Gas Brochure

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Oil & Gas Brochure

Friction Reducer Slurries

With Pilot’s expertise in surfactant chemistry, our oil & gas products provide cost-effective solutions to common problems during hydrocarbon production, fracturing operations, and more.

Pilot uses innovative processes to manufacture the highest quality performance chemical solutions to help our customers grow profitably. With a firm commitment to continuously adapting to the dynamic needs 
of the marketplace, we’re ready for the future and can support your company’s long-term success.

 As your preferred solutions provider, we have:     
- 7 patents in Oil & Gas Applications, with an additional 9 pending 
- Flexible in-house formulated delivery method for a wide range of FR options     
- A variety of surfactant chemistries for reservoir specific solutions 
- Surfactant manufacturing capabilities for market’s unmet needs

Our customers benefit from our new state-of-the-art innovation center, an expansion of the Pilot Polymer Technologies laboratory facility. We have six additional manufacturing facilities, including two located in Texas- in New Waverly and Houston.

Why Pilot

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