Benefits of utilizing a new class of graphene dispersions in drilling and hydraulic fracturing fluids to improve proppant efficiency and boost well productivity
1. Ultra-Low Friction and Lubrication (Nanoscale Lubrication)
Few-layer graphene in water- or oil-based systems forms a two-dimensional film that significantly reduces friction within rock pores.
- Enhances proppant transport through fractures → allowing deeper penetration and more uniform distribution.
- This is crucial for heterogeneous, fractured, or „depleted“ reservoirs where standard proppants tend to clog.
📣 Comparable to molybdenum or disulfide-based lubricants, but with superior chemical stability in aggressive environments.
2. Formation of Conductive Channels
Graphene dispersions can create electrically conductive bridges between proppants and fracture walls.
- Especially valuable when combined with electromagnetic stimulation of the reservoir → enhancing ionization effects and localized cavitation.
- Imparts antistatic properties, reducing the adhesion of fine particles to the proppant surface.
3. Protection and Stabilization of Proppant Structures
Graphene encapsulates proppant particles with a nanofilm that resists thermal and acidic degradation.
- Particularly relevant in high-temperature or saline-rich formations such as tight shales or carbonates.
- Improves proppant durability and mechanical resilience.
4. Rheological Optimization of Drilling and Fracturing Fluids
Few-layer graphene dispersions modulate:
- Viscosity
- Thixotropy
- Stability under pressure and temperature Graphene can retain moisture and act as a stabilizer for gel phases at elevated temperatures.
- Crucial for multi-stage hydraulic fracturing, where fluid consistency over time is essential.
5. Enhanced Recovery of Residual Oil and Gas
By interacting with pore structures, graphene reduces capillary pressure, enabling:
- More effective drainage
- Lower wettability
- Expulsion of residual hydrocarbon phases This improves output even from mature wells previously deemed uneconomical.
6. Anti-Corrosion and Antibacterial Properties
Graphene in fracturing fluids can inhibit the growth of sulfate-reducing bacteria (a major source of microbiologically influenced corrosion in wells).
- Also offers protection for metal components in casing and pumping systems.
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