Polyaromatic Cyclodextrin Complex for Heavy Oil Viscosity Reduction
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Solution Overview
Problem
Current methods for reducing the viscosity of heavy crude oil in oil recovery processes, such as waterflooding, are inefficient and costly due to the limited success of existing viscosity reducers, which struggle to effectively lower the viscosity of heavy oil for efficient production and transportation.
Innovation Solution
A water-soluble viscosity reducer complex composed of a hydrophobic tri-polymer containing acrylamide, cyclodextrin, and a pyrene-based monomer, combined with a hydrophilic component of polyaromatic compounds and polyethylene glycol, that self-assembles to interact with asphaltene aggregates in heavy oil, forming an oil-in-water emulsion and reducing viscosity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional viscosity reducers (PPDs or VRAs) are used to reduce heavy oil viscosity, then viscosity reduction is achieved, but the recovery efficiency remains low (5%-25%) and the process is costly
Solution Approach 1:
The patent combines hydrophobic polymers (for viscosity reduction) and surfactants (for emulsification) into a single composite chemical agent. This composite structure allows the molecule to simultaneously reduce oil viscosity through polymer-chain disruption and enhance waterflooding efficiency through emulsification, directly resolving the contradiction between viscosity reduction effectiveness and oil recovery efficiency
Solution Approach 2:
The invention merges two separate functional components (viscosity reducer and surfactant) into one integrated chemical entity. The hydrophobic portion interacts with asphaltene aggregates to reduce viscosity, while the hydrophilic portion forms stable emulsions with water, combining both functions into a single injection solution that addresses both technical requirements simultaneously
2Productivity
If heavy crude oil viscosity is reduced for efficient production and transportation, then productivity improves, but conventional methods are costly and not very successful
Solution Approach 1:
The composite chemical agent performs multiple functions simultaneously: it acts as a viscosity reducer, an emulsifier, and a dispersant. This multi-functionality eliminates the need for separate chemical treatments or complex processing steps, reducing overall operational costs while improving production efficiency, thereby making the process more cost-effective
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 complex effectively reduces the viscosity of heavy crude oil by up to 80%, enhancing its fluidity and facilitating efficient oil recovery, while being resistant to high temperatures and salinity, thus improving the exploitation of heavy oil resources.
Implementation Method 1
the hydrophobic component and the hydrophilic component self-assemble to form the viscosity reducer complex via a host-guest interaction
Implementation Method 2
forming an oil-in-water emulsion and reducing viscosity
Data Source
AI summary
This disclosure relates to water-soluble viscosity reducer complexes for use in reducing the viscosity of heavy oil in oil recovery operations. The viscosity reducer complexes contain a hydrophilic component of polyaromatic-hydrocarbon-based polymers and a hydrophilic component of cyclodextrin-based polymers.