Alkylamine-Modified Titanium Disulfide Nanomaterial for Oil Displacement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current nanomaterials used for tertiary oil recovery suffer from small specific surface area, high cost, poor dispersion stability, and limited oil recovery improvement, with traditional surfactants causing irreversible damage to reservoirs and low sweep efficiency.
Innovation Solution
A modified titanium disulfide nanomaterial is prepared by grafting a hydrophobic alkylamine chain onto a hydrophilic titanium disulfide nanosheet, reducing interfacial tension and enhancing dispersion stability through a specific preparation method involving ketone compounds and alkylamine additives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If traditional surfactants are used for tertiary oil recovery, then interfacial tension between oil and water is reduced, but adsorption loss increases and reservoir damage occurs
Solution Approach 1:
The patent changes the chemical parameters by replacing traditional surfactant molecules with nanoscale titanium disulfide particles having different physical and chemical properties. The nanomaterials exhibit size-dependent surface area, quantum effects, and unique surface chemistry that alter interfacial behavior without the adverse adsorption characteristics of conventional surfactants.
Solution Approach 2:
The patent employs composite nanomaterials consisting of titanium disulfide core particles with surface-modified functional groups. This composite structure combines the structural stability of inorganic nanomaterials with the surface activity needed for interfacial tension reduction, achieving effective oil recovery without surfactant adsorption losses.
2Productivity
If polymer with high viscoelasticity is injected to improve sweep efficiency, then crude oil displacement is enhanced, but pore throat blockage occurs causing irreversible reservoir damage
Solution Approach 1:
The patent replaces the mechanical viscoelastic polymer system with a nanomaterial-based system that achieves similar displacement enhancement through different mechanisms. The nanomaterials reduce interfacial tension and generate structural separation pressure without relying on high viscosity, thereby avoiding pore throat blockage while maintaining sweep efficiency.
Solution Approach 2:
The nanomaterials provide localized action at the oil-water interface and within pore structures, reducing interfacial tension precisely where needed without creating bulk viscosity that would block pores. This localized quality enhancement achieves displacement improvement without the harmful side effects of polymer flooding.
3Force
If conventional nanomaterials are used for oil recovery, then interfacial tension is reduced, but specific surface area is small and dispersion stability is poor
Solution Approach 1:
The patent segments the nanomaterial system into individually stabilized particles with controlled surface properties. Each nanoscale titanium disulfide particle is independently functionalized to prevent aggregation, maximizing the exposed surface area available for interfacial activity while maintaining stable dispersion in the injection fluid.
Solution Approach 2:
The patent optimizes critical parameters including particle size distribution, surface area to volume ratio, and surface functional group density. These parameter changes increase the effective specific surface area while simultaneously improving dispersion stability through controlled surface chemistry that prevents particle aggregation.
4Productivity
If conventional nanomaterials are used for tertiary oil recovery, then some oil recovery improvement is achieved, but cost is high and dispersion stability is poor
Solution Approach 1:
The patent adopts a cost-effective nanomaterial approach using titanium disulfide, which is more economically viable than precious metal-based nanomaterials. The materials are designed to provide effective oil recovery enhancement at lower cost, with optimization of dosage and injection strategy to maximize return on investment.
Solution Approach 2:
The patent optimizes material parameters including composition, particle size, and surface functionalization to achieve the minimum effective concentration for oil recovery improvement. This parameter optimization reduces material cost while maintaining dispersion stability and recovery enhancement effectiveness throughout the injection process.
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 modified titanium disulfide nanomaterial significantly improves oil recovery by reducing interfacial tension and enhancing stability, leading to improved oil displacement efficiency and reservoir exploitation.
Implementation Method 1
adding 1-15 parts by weight of an alkylamine compound to the mixture, controlling a pH of the mixture to 4-7, cooling to room temperature after modification reaction
Implementation Method 2
when a hydrophilic titanium disulfide nanosheet contains a hydrophobic alkylamine chain on a surface thereof, the titanium disulfide nanomaterial can effectively reduce an interfacial tension between oil and water
Implementation Method 3
the titanium disulfide nanomaterial can effectively reduce an interfacial tension between oil and water, has high dispersion stability
Data Source
AI summary
The present disclosure provides a modified titanium disulfide nanomaterial and its preparation method and application, including the following steps: 1) mixing 1 part by weight of a hydrophilic titanium disulfide nanosheet with 50-200 parts by weight of a ketone compound to obtain a mixture; 2) adding 1-15 parts by weight of an alkylamine compound to the mixture, controlling a pH of the mixture to 4-7, cooling to room temperature after modification reaction, and washing with ethanol, to obtain the modified titanium disulfide nanomaterial; where the number of carbon atoms in the alkylamine compound is C6-C18. The modified titanium disulfide nanomaterial provided by the present disclosure can significantly improve the oil recovery.