Friction Reducing Additives with Nanoparticles for Hydraulic Fracturing
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Solution Overview
Problem
Conventional hydraulic fracturing treatments in subterranean formations face energy losses due to friction, requiring high pressures and large amounts of fluid, which can lead to formation damage and inefficient fracture creation in low permeability formations.
Innovation Solution
The use of friction reducing additives comprising a combination of polymers and nanoparticles in treatment fluids, which interact to enhance viscosity and reduce friction, allowing for effective fracture creation with reduced energy input and minimal formation damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional friction reducing polymers are used in aqueous treatment fluids, then energy losses due to friction are reduced, but large amounts of polymer are required which increases cost and complexity
Solution Approach 1:
The patent combines polymers with nanoparticles (such as silica, metal oxides, or carbon-based particles) to create composite friction reducing additives. This composite structure leverages the viscosity-modifying properties of polymers and the surface-active properties of nanoparticles, achieving enhanced friction reduction efficiency with lower concentrations of both components compared to conventional polymer-only additives.
Solution Approach 2:
The patent utilizes shear-thinning non-Newtonian fluid behavior by selecting polymers and nanoparticles that change viscosity under different flow conditions. The treatment fluid maintains higher viscosity at low shear rates for better fracture conductivity but reduces viscosity at high shear rates during pumping to minimize friction losses and energy requirements.
2Power
If large amounts of water or fluids are pumped at high rates and pressures to create fractures, then sufficient energy is provided to form fractures of desired geometries, but formation damage and plugging may occur
Solution Approach 1:
The patent employs shear-thinning fluids that exhibit high viscosity at low shear rates to maintain fracture conductivity and low viscosity at high shear rates during injection to reduce pumping friction. This parameter change allows effective fracture creation with reduced energy input and minimizes formation damage by avoiding excessive shear stresses on formation particles.
Solution Approach 2:
The treatment fluid is designed with spatially varying properties: high viscosity in the fracture zone to maintain conductivity, and reduced viscosity in the wellbore during pumping to minimize friction. The polymer and nanoparticle concentrations can be optimized locally to achieve different rheological properties in different zones of the treatment system.
3Productivity
If small size proppant is used with low viscosity fluid in slickwater treatments, then fractures can be created in low permeability formations, but considerable energy is lost due to friction between turbulent flow and formation/tubular goods
Solution Approach 1:
The patent uses shear-thinning treatment fluids that transition from high viscosity at low shear rates (improving proppant suspension and transport in low permeability formations) to low viscosity at high shear rates (reducing friction losses during high-rate pumping). This dynamic parameter change resolves the contradiction between productivity and energy efficiency.
Solution Approach 2:
The combination of polymers and nanoparticles creates a composite fluid system that enhances proppant suspension capability while maintaining low friction during pumping. The nanoparticles provide additional surface area for fluid structure formation, improving proppant carrying capacity without requiring high fluid viscosity throughout the entire flow path.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The additives achieve enhanced viscosity and friction reduction, enabling more efficient fracture stimulation with less polymer usage, reduced plugging, and effective conductivity maintenance in subterranean formations, even in challenging fluids like brines.
Implementation Method 1
the nanoparticles may interact or associate with molecules of the polymer (e.g., via hydrogen bonding, hydrophobic association, covalent bonding, ionic associations, etc.)
Implementation Method 2
the nanoparticles may interact or associate with molecules of the polymer (e.g., via hydrogen bonding, hydrophobic association, covalent bonding, ionic associations, etc.)
Implementation Method 3
introducing the treatment fluid into a portion of a subterranean formation at or above a pressure sufficient to create or enhance at least one fracture
Data Source
AI summary
Compositions and methods for use in fracturing treatments using friction reducing additives that include nanoparticles are provided. In some embodiments, the methods include: providing a treatment fluid that includes an aqueous base fluid and a friction reducing additive, the friction reducing additive including at least one polymer and a plurality of nanoparticles; and introducing the treatment fluid into a portion of a subterranean formation at or above a pressure sufficient to create or enhance at least one fracture in the subterranean formation.