Polyacid-Polyamine Adhesive Coating for Proppant Flowback Control
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Solution Overview
Problem
Hydraulic fracturing operations face challenges with fines migration and proppant flowback, leading to reduced conductivity and increased well maintenance costs, while current dust control methods using polymeric resins are brittle and prone to mechanical degradation, causing secondary dust issues.
Innovation Solution
A composition comprising a reaction product of polyacids and polyamines, combined with specific branched, cyclic, or linear aliphatic acids, is used to create an adhesive coating for substrates, which adheres fines to sand, preventing migration and aggregation, and provides a flexible coating layer to maintain conductivity and reduce dust.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If polymeric resin coatings are used for dust control, then dust generation is reduced, but the coating becomes brittle and prone to mechanical degradation causing secondary dust
Solution Approach 1:
The patent changes the chemical composition parameters by using a reaction product of polyacid and polyamine instead of conventional polymeric resins. This chemical parameter change results in a coating that maintains flexibility while providing dust control, eliminating the brittleness issue of traditional polymer coatings.
Solution Approach 2:
The invention creates a composite coating material by combining the reaction product of polyacid-polyamine with specific aliphatic acids (branched, cyclic, or linear). This composite approach produces a coating that integrates both dust control properties and mechanical flexibility, avoiding the brittleness of single-component polymer systems.
2Reliability
If tacky chemicals are added to reduce proppant flowback, then flowback is reduced, but equipment and wellbores may become clogged during operation
Solution Approach 1:
The patent modifies the tackiness parameter by using a reaction product of polyacid and polyamine with specific aliphatic acids, which provides controlled adhesion. This parameter optimization reduces proppant flowback while preventing excessive stickiness that would cause clogging of equipment and wellbores during operation.
3Reliability
If curable resin coated proppant is used to reduce flowback, then flowback is reduced, but coating erosion occurs during loading and off-loading
Solution Approach 1:
The invention changes the coating composition parameters by using a reaction product of polyacid-polyamine combined with specific aliphatic acids. This creates a coating with optimized mechanical properties that resists erosion during handling operations while maintaining flowback control performance.
4Object-affected harmful factors
If polymer coatings are applied to control dust, then dust generation is reduced, but complex compositions and procedures are required
Solution Approach 1:
The patent develops a composite coating system using the reaction product of polyacid-polyamine with specific aliphatic acids. This composite material achieves effective dust control while simplifying the composition compared to conventional polymer systems, reducing both formulation complexity and application procedure complexity.
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 adhesive composition effectively adheres fines to sand, preserving conductivity and reducing dust generation, while being flexible to prevent mechanical degradation and clogging, thus enhancing the performance and longevity of hydraulic fracturing operations.
Implementation Method 1
The present invention particularly relates to compositions and products for reducing or mitigating the production of dust from the handling of substrates... adheres fines to sand, preventing migration and aggregation
Data Source
AI summary
The embodiments described herein generally relate to methods and chemical compositions for fracturing fluid applications. In one embodiment, a fracturing fluid composition is provided comprising a fracturing fluid and an additive composition including a reaction product of a diglycidyl ether or a polyacid selected from the group consisting of an aromatic polyacid, an aliphatic polyacid, an aliphatic polyacid with an aromatic group, and combinations thereof; and a polyamine; and one or more compounds selected from the group consisting of a branched aliphatic acid, a cyclic aliphatic acid with a cyclic aliphatic group, a linear aliphatic, and combinations thereof.