NIR Spectroscopy for Real-Time Crude Oil Blending
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Solution Overview
Problem
The increasing variability in crude oil composition from unconventional shale formations and the comingling of different oil streams challenge the traditional methods of assessing oil quality based on API gravity, leading to inefficiencies in refining and pricing, as well as safety and handling issues during transportation.
Innovation Solution
A system and method for real-time monitoring and blending of fluids using near-infrared spectroscopy to determine the composition and energy content of crude oil in pipelines, allowing for adjustments in flow rates to achieve desired characteristics and prevent contamination, by employing scanning sources that operate within the 1350 nm to 1850 nm range and utilizing processing modules to analyze spectroscopic data for accurate composition analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional API gravity-based assessment methods are used for crude oil quality evaluation, then the assessment process is simple and cost-effective, but the accuracy and reliability of composition analysis deteriorates due to increasing variability in crude oil from unconventional shale formations
Solution Approach 1:
The patent replaces traditional mechanical/chemical laboratory analysis methods with optical spectroscopy (NIR and MIR) to determine crude oil composition. This substitution enables real-time, non-intrusive measurement of hydrocarbon components, water content, and contaminants without requiring physical sample handling or complex chemical assays, thereby improving measurement precision while maintaining operational simplicity
Solution Approach 2:
The patent transforms the assessment approach by measuring multiple spectral parameters (absorption coefficients at specific wavelengths, peak areas, ratios) simultaneously rather than relying on a single API gravity value. This multi-parameter spectral analysis captures the complex variability in shale crude compositions, enabling accurate determination of individual hydrocarbon components, water content, and contaminants through changes in spectral characteristics
2Reliability
If real-time monitoring and blending control systems are implemented, then the ability to meet refinery specifications and prevent contamination is improved, but the system complexity and initial investment cost increase
Solution Approach 1:
The patent implements real-time monitoring upstream at gathering line entry points to the common carrier pipeline, enabling preliminary detection and correction of composition issues before they propagate through the system. By measuring composition continuously at the source, the system can prevent contamination and specification violations before they occur, rather than detecting them after the fact
Solution Approach 2:
The patent establishes a closed-loop feedback system where real-time spectral measurements of crude oil composition are continuously fed back to control systems that adjust blending operations. The processing module uses measured composition data to dynamically control flow rates from different gathering lines, ensuring the blended oil in the common carrier pipeline continuously meets refinery specifications, thereby improving reliability through automatic correction
3Measurement precision
If spectroscopic analysis in the 1350 nm to 1850 nm range is used for composition determination, then the accuracy of energy content and contaminant detection is improved, but the requirement for specialized equipment and operational expertise increases
Solution Approach 1:
The patent employs near-infrared spectroscopy in the 1350 nm to 1850 nm range, which serves multiple functions simultaneously: determining hydrocarbon composition, calculating energy content (BTU value), detecting water content, and identifying contaminants. This single spectral region provides universal analysis capability for all critical parameters, eliminating the need for separate analytical instruments and reducing overall system implementation complexity
Solution Approach 2:
The patent implements automated processing modules that perform spectral analysis, composition calculation, and quality assessment without requiring manual intervention or specialized operator expertise. The system self-calibrates using reference standards and automatically interprets spectral data to provide direct composition and energy content readings, making the advanced spectroscopic technology as easy to operate as traditional methods
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
Enables real-time monitoring and adjustment of oil composition to meet refinery specifications, preventing contamination, optimizing delivery timing, and increasing refining efficiency and profit margins by accurately determining the energy content and contaminant levels in crude oil streams.
Implementation Method 1
A method and system for determining the energy content, physical properties and the constituent composition of crude oil... by scanning the NIR range on fluids within each of at least two transmission lines... The scan ranges from approximately 1350 nm up through 1850 nm
Data Source
AI summary
Methods and systems for real time, in situ monitoring and blending of hydrocarbon fluids from multiple transmission lines feeding into a downstream line or vessel are described. The method and system include the scanning of the NIR range on fluids within each of at least two transmission lines. The spectroscopic optical data from the two scans is used to determine flow rates of the fluids from each transmission line to, for example, achieve a desired energy content, physical properties, or speciation in the blended fluid.