Radiometric Model Re-parameterization for Downhole Fluid Analysis
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Solution Overview
Problem
The oil and gas industry faces challenges in accurately and efficiently characterizing optical sensors for downhole fluid analysis due to the high cost and frequency of radiometric re-characterization, which can compromise fluid test results and is inefficient with existing methods.
Innovation Solution
A portable and flexible radiometry system using transmissive light diffusers and reference material measurements to re-parameterize models, reducing the need for frequent re-characterization and maintaining accuracy in fluid analysis results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radiometric re-characterization is performed frequently using existing methods, then measurement precision is improved, but loss of time and productivity deteriorate
Solution Approach 1:
The patent applies preliminary action by pre-characterizing optical sensors in a controlled radiometry laboratory environment before field deployment. This initial comprehensive characterization creates a baseline model that can be used for extended periods in the field, eliminating the need for frequent re-characterization. The sensor is prepared in advance with full radiometric calibration, allowing it to maintain measurement precision over longer operational periods.
Solution Approach 2:
The patent uses copying by creating a radiometric model that replicates the sensor's optical response characteristics. This model, developed through preliminary radiometric characterization, serves as a reference that can be used to interpret field measurements without requiring physical re-characterization of the sensor. The model captures the sensor's behavior under various conditions, allowing accurate fluid analysis to be maintained over time.
2Measurement precision
If radiometric re-characterization is performed frequently, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent performs comprehensive radiometric characterization in advance during a controlled laboratory setting before the sensor is deployed to the field. This preliminary action ensures that all necessary calibration data is collected upfront, creating a robust radiometric model that can be used for extended periods without requiring time-consuming re-characterization events.
Solution Approach 2:
The patent implements self-service through the use of a radiometric model that autonomously interprets field sensor measurements. The model, once created through preliminary characterization, serves itself by continuously providing accurate fluid analysis from raw sensor data without requiring external re-characterization interventions. This self-sustaining approach eliminates repeated time losses associated with manual re-characterization procedures.
3Ease of operation
If transmissive diffusers are used for radiometric characterization, then ease of operation is improved, but device complexity may worsen
Solution Approach 1:
The patent extracts the light diffusion function from complex reflective optical paths and implements it using simpler transmissive diffusers. By removing the need for complex reflective geometries and integrating the diffusion function into a straightforward transmissive component, the system achieves portability and ease of operation while maintaining radiometric characterization capability.
Solution Approach 2:
The patent substitutes complex mechanical optical alignment systems with transmissive diffusers that inherently provide the necessary light distribution. This replacement eliminates the need for precise mechanical positioning and complex optical train configurations, significantly simplifying the device while improving ease of operation and portability.
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
This approach reduces the cost and frequency of radiometric re-characterization, enhancing the accuracy and efficiency of fluid analysis by using transmissive diffusers and reference material measurements to maintain model accuracy over time.
Implementation Method 1
transmissive light diffusers
Data Source
AI summary
Methods and systems for implementing and utilizing radiometric characterization in combination with reference material characterization of an optical sensor to more accurately and efficiently measure material properties are disclosed. In some embodiments, a method for for optically measuring material properties includes an optical sensor being radiometrically characterized based on measured optical responses. A model is generated and includes model components of the optical sensor. A parameterized model is generated by fitting n variable parameters of the model components using the optical responses. The optical sensor is utilized to measure an optical response to a reference material and a re-parameterized model is generated by re-fitting m of the n variable parameters of the model components based, at least in part, on the measured optical response to the reference material, wherein m is less than n.