Functionalized Nanoparticle Foaming Agents for EOR Foam Stability
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Solution Overview
Problem
Existing foaming chemistries for enhanced oil recovery (EOR) are high-cost, unstable, and cause interface issues in downstream equipment, reducing the effectiveness of foam-displacement EOR techniques.
Innovation Solution
A functionalized foaming agent is developed, comprising nanoparticles, polymers, or a combination thereof, with functional groups derived from donor molecules such as organosilicon molecules and alkyl halides, which are used to generate and stabilize foam for hydrocarbon production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional foaming chemistries are used, then foam can be generated for EOR, but the foam is unstable and high-cost
Solution Approach 1:
The patent changes the chemical parameters of the foaming agent by using functionalized nanoparticles and polymers with specific functional groups (donor molecules) that alter the foam stabilization mechanism. This provides cost-effective foam stability through chemical modification rather than traditional expensive surfactants.
Solution Approach 2:
The invention combines nanoparticles and polymers into a composite foaming system where the functional groups on nanoparticle surfaces interact with polymer chains to create stabilized foam. This composite approach replaces traditional single-component high-cost foaming chemistries.
2Reliability
If large volumes of polymers/surfactants with high molecular weight are introduced, then foam can be generated, but interface issues occur in downstream equipment
Solution Approach 1:
The patent uses functionalized nanoparticles that provide foam stabilization through surface functional groups rather than relying on large volumes of high molecular weight polymers. This reduces the harmful interface effects in downstream equipment while maintaining foam generation capability.
3Quantity of substance
If foam front expands due to gas-liquid interface expansion, then foam is produced, but foam mobility decreases and EOR effectiveness is reduced
Solution Approach 1:
The functional groups on nanoparticle surfaces change the interfacial properties of the foam, allowing for better mobility control. The modified surface chemistry prevents excessive foam front expansion while maintaining adequate foam volume for effective oil displacement.
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 functionalized foaming agent provides low-cost, efficient, and thermostable foam generation, reducing residence time, toxicity, and interface issues, thereby enhancing the effectiveness of foam-assisted EOR processes.
Implementation Method 1
the at least one nanoparticle, the at least one polymer, or the combination thereof further includes a functional group from a donor molecule
Implementation Method 2
the donor molecule may be organosilicon molecules, alkyl halides with a chain of eight or more carbon atoms, and combinations of the same
Data Source
AI summary
Functionalized foaming agents can be used to produce and improve stabilized foamers for use in the recovery of petroleum products from subterranean formations. In some embodiments, the functionalized foaming agent includes at least one nanoparticle, at least one polymer, or a combination thereof, where the nanoparticle(s), the polymer(s), or the combination thereof includes a functional group from a donor molecule. Suitable donor molecules include organosilicon molecules, alkyl halides with a chain of eight or more carbon atoms, and combinations of the same. In other embodiments, the functionalized foaming agent includes at least one nanoparticle, at least one polymer, or a combination thereof and a carrier fluid. The functionalized foaming agent can be introduced into a well or reservoir as part of an enhanced oil recovery (EOR) by injecting slugs of the functionalized foaming agent and slugs of gas in an alternating pattern to produce a foam.