Sub-micron Additive Composition for Hydrocarbon Flow Assurance
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Solution Overview
Problem
In the oil and gas industry, hydrocarbon fluids produced from subterranean formations often lead to deposition of solids like hydrates, waxes, and scales, which cause operational issues such as reduced production and equipment blockages due to precipitation and deposition on equipment surfaces during pressure and temperature changes.
Innovation Solution
The use of additive compositions containing sub-micron particles and inhibitors is introduced to prevent or control the formation of aggregates and precipitates in hydrocarbon fluids, which are added to the fluids or drilling fluids to inhibit the precipitation of asphaltenes, waxes, and hydrates, thereby reducing deposition and maintaining pipeline flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If chemical inhibitors are used to control solid precipitation and deposition, then solid deposition is reduced, but the complexity of the fluid composition increases
Solution Approach 1:
The patent combines chemical inhibitors with sub-micron solid particles to create a composite additive composition. This composite approach allows the sub-micron particles to physically block precipitation sites while the chemical inhibitors provide molecular-level prevention, achieving enhanced solid deposition control without requiring excessive amounts of single-type additives, thus managing composition complexity effectively
Solution Approach 2:
The sub-micron solid particles act as intermediary agents that interfere with the precipitation process. These particles provide alternative surfaces that prevent the formation of larger solid aggregates, thereby reducing deposition on equipment surfaces. The intermediary particles bridge the gap between the hydrocarbon fluid and the precipitation process, offering a mechanism to control solids without significantly increasing the complexity of the overall fluid composition
2Productivity
If additives are added to inhibit precipitation of asphaltenes, waxes, and hydrates, then production efficiency is improved, but the cost of the fluid composition increases
Solution Approach 1:
The patent merges sub-micron solid particles with chemical inhibitors in a single additive composition. This combination allows the sub-micron particles to provide physical interference with precipitation while the chemical inhibitors provide molecular-level prevention. The synergistic effect of this combination achieves enhanced production efficiency at lower additive concentrations compared to using either component alone, thereby reducing overall material costs while maintaining high productivity
Solution Approach 2:
The invention changes the physical parameters of the additive composition by incorporating sub-micron particles with specific size ranges (0.01-10 microns). This parameter change enables the additives to function through both physical blockage and chemical inhibition mechanisms, achieving superior precipitation control at reduced concentrations. The modified particle size distribution and composition parameters allow for more effective inhibition per unit volume, reducing the total quantity of additives needed and associated costs
3Ease of operation
If sub-micron particles are added to prevent aggregate formation, then fluid flow is maintained, but the manufacturing complexity of the additive composition increases
Solution Approach 1:
The sub-micron solid particles are pre-sorted and pre-dispersed in the additive composition before introduction to the hydrocarbon fluid. This preliminary preparation ensures uniform distribution and prevents aggregation of the sub-micron particles themselves. By performing the dispersion and size separation actions in advance during additive manufacturing, the complexity of maintaining fluid flow is reduced during actual production operations, as the additives are already in the optimal state to prevent aggregate formation
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 additive compositions effectively delay or prevent the precipitation of solids, reducing deposition and maintaining pipeline flow, thereby enhancing production rates and reducing operational costs associated with blockage removal and heating.
Implementation Method 1
chemical additives may operate by disrupting the growth of solid particles or other crystalline materials, leading to a decrease in the average size of these insoluble impurities and inhibiting precipitate formation
Implementation Method 2
chemical additives may also disperse deposited solids and remediate scale and wax buildup
Data Source
AI summary
Methods may include admixing an additive composition with a hydrocarbon fluid, wherein the additive composition contains at least one inhibitor and at least one sub-micron particle. Additional methods may include providing an additive composition containing at least one inhibitor and at least one sub-micron particle; adding the additive composition to a fluid capable of precipitating at least one of at least of asphaltenes, wax, scale, and gas hydrates; and transporting the fluid containing the additive composition.