Electrostatic Particle Assembly for Subterranean Fluid Loss Mitigation
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Solution Overview
Problem
Subterranean storage reservoirs face significant fluid loss due to natural and artificial pores, fractures, and hydraulic fracturing, which existing methods inadequately address, leading to uncontrolled fluid pressure and reservoir expansion.
Innovation Solution
Compositions comprising rock surface adhesion promoters, particles, and crosslinking agents are applied in layers to create a fluid-impermeable barrier through electrostatic interactions and chemical transformations, forming a self-healing, elastic coating that bridges fractures and voids, using materials like polyDADMAC, PHPA, and asphalt emulsions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical blockage materials are used to prevent fluid loss, then fluid leakage is reduced, but the treatment complexity and material requirements increase
Solution Approach 1:
The patent replaces mechanical blockage methods with electrostatic field-based particle assembly. Instead of using complex mechanical barriers or multiple layered materials, the invention uses an electric field to assemble particles into a cohesive seal at the fluid loss zone, simplifying the treatment approach while maintaining effectiveness.
Solution Approach 2:
The invention changes the state of particles from dispersed to assembled by applying electrostatic fields. This parameter change (from random distribution to organized assembly driven by electrostatic forces) creates an effective seal without requiring complex material compositions or multi-step mechanical insertion processes.
2Reliability
If existing seal materials are applied to reservoirs, then some fluid loss is prevented, but uncontrolled fluid pressure and reservoir expansion occur
Solution Approach 1:
The patent replaces mechanical compression of seal materials with electrostatic field-driven particle assembly. This substitution allows the seal to form without exerting excessive mechanical pressure on the reservoir, thereby preventing hydraulic fracturing and reservoir expansion while still achieving effective fluid loss prevention.
Solution Approach 2:
The electrostatic field acts as an intermediary mechanism that assembles particles into a seal without requiring direct mechanical compression. This intermediary approach creates the seal through electrostatic forces rather than mechanical pressure, avoiding the harmful side effects of excessive stress on the reservoir formation.
3Reliability
If polymer particles are used to thicken fluid and form gels, then fluid loss is reduced, but the gel may not achieve sufficient mechanical strength under cyclical stress
Solution Approach 1:
The patent replaces mechanical gel formation through polymer crosslinking with electrostatic field-driven particle assembly. This substitution creates a seal structure that achieves mechanical strength through electrostatic bonding and particle interlocking rather than relying on gel elasticity, providing better resistance to cyclical stress changes.
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 solution effectively prevents fluid loss by creating a uniform, water-impermeable coating that withstands cyclical stress, maintaining reservoir integrity and preventing further fluid leakage.
Implementation Method 1
assembly of particles on the formation's surfaces driven by electrostatic interactions
Implementation Method 2
The coatings provided by the layer-by-layer assembled coating are composed of viscous, water-insoluble liquids that provide self-healing properties to the coating
Data Source
AI summary
Compositions are provided for preventing or alleviating loss of fluids from natural or artificial reservoirs formed in subterranean geological formations and methods for deployment of said compositions. The compositions can be delivered to the subterranean reservoirs in any number of steps and are comprised of rock surface adhesion promoter(s), particles that may consist of solids, gels and liquids, crosslinking agent(s) and a liquid medium. The method of the invention uses the composition of the invention in preventing or alleviating loss of fluid stored in a reservoir existing in a subterranean formation. In the method, the composition is preferably provided in a series of weighted or unweighted “pills” for introduction into the reservoir. Such a series may include from one to any number of consecutive treatments. Multiple pills or treatments may be used if needed.