Graphene oxide as a high-performance fluid-loss-control additive in water-based drilling fluids

Area of Science:

• Materials Science
• Chemical Engineering
• Petroleum Engineering

Background:

• Traditional drilling fluids often use clay and polymer suspensions for filtration control.
• These additives can be less effective under high-temperature and high-pressure conditions.
• There is a need for advanced materials to improve drilling fluid performance.

Purpose of the Study:

• To evaluate graphene oxide (GO) as a filtration additive in water-based drilling fluids.
• To compare the performance of GO with conventional clay-based additives.
• To investigate the potential of GO for high-temperature well applications.

Main Methods:

• Standard American Petroleum Institute (API) filtration tests were performed.
• Aqueous dispersions of graphene oxide (GO) and xanthan gum were analyzed.
• Scanning electron microscopy (SEM) was used to examine filter cake structure and GO morphology.

Main Results:

• Graphene oxide (GO) at 0.2% carbon content significantly reduced fluid loss (6.1 mL) compared to clay-based additives (7.2 mL).
• A 3:1 ratio of large-flake GO to powdered GO yielded the thinnest filter cake (~20 μm).
• SEM revealed GO's pliability, enabling it to pass through small pores.

Conclusions:

• Graphene oxide (GO) is a highly effective filtration additive for water-based drilling fluids.
• GO-based additives offer superior performance and thinner filter cakes than conventional materials.
• GO's shear thinning, temperature stability, and pliability make it suitable for demanding high-temperature well conditions.