Downhole Sampling System for In Situ Fluid Phase Transition Analysis
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Solution Overview
Problem
Current methods for analyzing hydrocarbon fluids in reservoirs require laboratory analysis, which is time-consuming and does not allow for immediate optimization of production strategies, as they cannot perform in situ contamination correction and phase transition property determination downhole.
Innovation Solution
A downhole sampling system equipped with a contamination monitoring module and a microfluidic module that analyzes fluid samples in situ to determine contamination levels and phase transition properties, enabling immediate data processing and improved oil recovery strategies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fluid samples are taken to laboratory for analysis, then comprehensive fluid characteristics can be determined, but time is lost and immediate optimization of production strategies is not possible
Solution Approach 1:
The patent extracts the analysis function from the laboratory setting and places it downhole at the reservoir location. The sampling system includes downhole sensors and processing equipment that perform fluid analysis in situ, eliminating the need to transport samples to the surface laboratory while maintaining measurement capabilities.
Solution Approach 2:
The patent introduces downhole sampling equipment as an intermediary between the reservoir fluid and the analysis system. This intermediary includes contamination monitoring modules and microfluidic devices that enable direct downhole analysis, serving as a bridge between the reservoir and production optimization without requiring surface laboratory intervention.
2Measurement precision
If fluid samples are analyzed in the laboratory, then accurate phase transition properties can be obtained, but the process is too slow for immediate production optimization
Solution Approach 1:
The patent performs fluid analysis downhole at the reservoir location before the samples would normally be transported to the laboratory. By conducting the analysis in advance at the source, the system obtains phase transition property data immediately, enabling real-time production optimization without waiting for laboratory processing.
Solution Approach 2:
The patent replaces the mechanical system of physical sample transport and laboratory analysis with downhole electronic sensing and processing systems. The sampling equipment includes integrated sensors and processing devices that perform measurements in situ, substituting the traditional mechanical workflow with automated downhole analysis capabilities.
3Loss of time
If downhole sampling is performed during well cleanup, then immediate fluid analysis is possible, but sample contamination must be monitored and corrected
Solution Approach 1:
The patent designs the downhole sampling system to perform multiple functions: sampling, contamination monitoring, and fluid property analysis. The contamination monitoring module and microfluidic devices are integrated into the same system that performs the primary sampling function, allowing the equipment to handle both contamination detection and fluid characterization without requiring separate systems.
Solution Approach 2:
The patent implements feedback mechanisms where contamination levels are continuously monitored and used to adjust the sampling and analysis processes in real-time. The system provides feedback on sample quality, enabling operators to correct contamination issues immediately while maintaining the benefits of downhole analysis.
Data Source
AI summary
A technique facilitates fluid analysis in situ at a downhole location. According to an embodiment, a sample of fluid, e.g. oil, is obtained from a reservoir at the downhole location in a borehole. A downhole sampling system is used to determine contamination of the sample of fluid and to determine other selected characteristics of the sample. The data obtained is then processed to determine a true phase transition property of a native fluid in the sample of fluid. The sample analysis may be performed at selected stations along the borehole during, for example, a well cleanup operation. The immediate analysis of fluid samples downhole facilitates rapid development of an understanding of fluid characteristics in the reservoir, thus enabling an improved oil recovery strategy.