Polysaccharide Wax Modifier for Hydrocarbon Fluid Deposition
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Solution Overview
Problem
Hydrocarbon production from subterranean formations faces challenges due to the precipitation and deposition of solids like waxes, asphaltenes, and other insoluble materials during changes in pressure and temperature, leading to operational issues such as blockages and reduced production rates in pipelines and storage tanks.
Innovation Solution
The use of wax modifiers derived from polysaccharides reacted with fatty acid reagents, which are added to hydrocarbon fluids to inhibit the precipitation and deposition of waxes and other insoluble materials by altering their crystal morphology and intermolecular interactions, thereby reducing aggregation and deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If chemical additives are used to disrupt solid particle growth and inhibit precipitate formation, then solid deposition is mitigated, but fluid composition complexity increases
Solution Approach 1:
The patent uses chemical additives as intermediary substances that mediate between the hydrocarbon fluid and solid particles. These additives adsorb onto particle surfaces, modifying interfacial properties and preventing direct interaction between particles and equipment surfaces, thereby mitigating deposition while maintaining fluid integrity
Solution Approach 2:
The invention employs composite chemical formulations containing multiple functional components including surfactants, polymers, and inhibitors work synergistically. This composite approach provides multifunctional protection against various deposition mechanisms while optimizing performance at lower overall concentrations
2Object-affected harmful factors
If dispersants and solvents are added to alter particle size and shape, then deposition is reduced, but fluid viscosity increases
Solution Approach 1:
The patent utilizes additives that induce parameter changes in particle characteristics, specifically altering particle size distribution and morphological shape factors. By controlling these parameters, the additives prevent particle aggregation and deposition while minimizing impact on bulk fluid viscosity through optimized molecular structure and concentration
3Ease of repair
If chemical additives are used to disperse deposited solids, then scale and wax buildup is remediated, but operational complexity increases
Solution Approach 1:
The patent implements self-service functionality through chemical additives that automatically disperse and remove deposited solids without requiring mechanical intervention. The additives continuously circulate with the fluid stream, autonomously detecting and acting on deposited materials through adsorption and detachment mechanisms, eliminating the need for separate remediation operations
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 wax modifiers effectively delay or prevent the precipitation of waxes and other insoluble components, reducing deposition and maintaining fluid flow, thereby enhancing production efficiency and reducing operational costs by stabilizing poorly soluble components and dispersing existing aggregates.
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 operate by disrupting the growth of solid particles or other crystalline materials, leading to a decrease in the average size of these insoluble impurities
Implementation Method 3
chemical additives may also disperse deposited solids and remediate scale and wax buildup
Data Source
AI summary
Compositions may include a wax modifier that is the product of a reaction between a polysaccharide having a number of sugar subunits in the range of 2 to 60 and one or more fatty acid reagents, and a reservoir fluid produced from a subterranean formation comprising one or more components capable of producing waxes. Methods may include contacting a hydrocarbon fluid with a wax modifier, wherein the wax modifier is the product of the reaction of a polysaccharide and one or more fatty acid reagents. Methods may also include introducing a wax modifier into a wellbore penetrating a subterranean formation, wherein the wax modifier is the product of a reaction between a polysaccharide and one or more fatty acid reagents; producing hydrocarbons from the subterranean formation; and allowing the wax modifier to inhibit the precipitation of a wax.