Dextran-Fatty Acid Surfactant for Low Surface Tension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional surfactants used in the oil and gas industry face challenges such as poor biodegradation, high surface tension, and regulatory issues, limiting their effectiveness in emulsification and foaming applications, particularly in subterranean formations.
Innovation Solution
Biopolymer-based compounds, specifically saccharide polymers like dextran and maltodextrin reacted with fatty acids, are used to create reaction products with tunable hydrophilic-lipophilic balance, which interact synergistically with neutral surfactants to achieve low surface tension and enhance emulsification or de-emulsification, foaming, and foaming stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional synthetic surfactants are used, then emulsification and foaming functions are achieved, but biodegradation is poor and environmental compatibility is reduced
Solution Approach 1:
The invention changes the chemical composition parameters of surfactants by using biopolymer-based compounds (saccharide polymers like dextran and dextrin) reacted with fatty acids, while maintaining the required emulsification and foaming functions. This parameter change enables improved biodegradation and environmental compatibility without sacrificing functional performance.
Solution Approach 2:
The invention creates composite surfactant systems by combining biopolymer reaction products with neutral or zwitterionic surfactants. This composite approach allows the formulation to achieve both the desired functional performance and improved environmental compatibility, as the biopolymer component enhances biodegradation while the surfactant component maintains emulsification and foaming functions.
2Reliability
If ionic surfactants are used for foaming, then foam formation is promoted, but incompatibilities with divalent ions occur and regulatory constraints apply
Solution Approach 1:
The invention changes the charge parameter of surfactants from ionic to neutral or zwitterionic, eliminating incompatibilities with divalent ions while maintaining foam formation capability. The biopolymer-based compounds provide a neutral charge foundation that avoids precipitation issues with calcium and magnesium ions present in formation water.
Solution Approach 2:
The invention uses biopolymer-based compounds that are biodegradable and environmentally friendly, replacing expensive ionic surfactants that face regulatory constraints. These biopolymer surfactants provide effective foaming without the regulatory and compatibility issues, offering a more versatile and compliant solution.
3Reliability
If surfactants with high surface tension at critical micelle concentration are used, then emulsification function is achieved, but pumping downhole becomes difficult
Solution Approach 1:
The invention changes the surface tension parameter by formulating surfactant systems that achieve low surface tension values even at or above the critical micelle concentration. The combination of biopolymer reaction products with neutral or zwitterionic surfactants creates synergistic effects that maintain low surface tension across a range of concentrations, ensuring both emulsification function and ease of pumping.
4Device complexity
If a single class of surfactant compounds is used, then formulation simplicity is maintained, but tunability to particular downhole conditions is limited
Solution Approach 1:
The invention creates a universal surfactant platform using biopolymer-based compounds that can be tuned for multiple functions (emulsification, de-emulsification, foaming) and adapted to various downhole conditions. The neutral or zwitterionic base provides broad compatibility while the biopolymer component allows for chemical structure modification to optimize performance for specific applications and conditions.
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 reaction products effectively lower surface tension, improve emulsification and de-emulsification performance, and provide more stable foams compared to traditional surfactants, offering a cost-effective and environmentally friendly alternative for industrial and consumer products.
Implementation Method 1
The reaction product is present at a concentration effective to lower a surface tension of the neutral surfactant or zwitterionic surfactant
Implementation Method 2
surfactants may promote solubility of an otherwise sparingly soluble solid, increase foaming, facilitate emulsification or de-emulsification
Implementation Method 3
surfactants are also commonly employed for promoting foam formation in aqueous fluids
Data Source
AI summary
Compositions comprising a neutral surfactant or a reaction product thereof and a reaction product of a saccharide polymer and a fatty acid may be obtained in the presence of water and a hydroxide base (optionally in the presence of the neutral surfactant), the saccharide polymer comprising a dextran, a dextrin compound, or any combination thereof. The reaction product of the saccharide polymer and the fatty acid may be present at a concentration effective to lower surface tension of the neutral surfactant. Depending on the fatty acid identity, among other factors, the compositions may promote emulsification or de-emulsification. In addition, the compositions may promote foam formation under appropriate conditions. Treatment fluids comprising the compositions, including foamed treatment fluids, may be introduced into a subterranean formation to perform a treatment operation in which fluid emulsification or de-emulsification may occur. The reaction products may be incorporated in soaps and other personal care products.