Downhole Fluid Analysis Single Valve Flow Control
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Solution Overview
Problem
Current downhole fluid sampling and analysis methods face challenges in maintaining the integrity of formation fluids during transportation to the surface, leading to phase separation and compositional changes, which hinders accurate characterization and delays data availability, necessitating a more efficient and real-time analysis solution.
Innovation Solution
A downhole fluid characterization apparatus utilizing a single valve flow control system integrated with a primary flowline and a bypass flowline, along with a circulation pump, to isolate and characterize formation fluids in a closed loop, maintaining accurate phase behavior measurements and reducing hardware complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If samples are transported to the surface for laboratory analysis, then comprehensive characterization can be achieved, but phase separation and compositional changes occur during transportation
Solution Approach 1:
The patent performs downhole fluid analysis before transporting samples to the surface. Sensors and analyzers are deployed in the downhole environment to conduct measurements while fluids are still in their native pressure and temperature conditions, preventing phase separation and compositional changes that would occur during surface transportation.
Solution Approach 2:
The patent introduces downhole sensors and analysis modules as intermediaries between the formation fluids and surface laboratories. These intermediaries enable direct measurement and characterization of fluids at their in-situ conditions, eliminating the need to transport samples to surface laboratories where phase separation would occur.
2Ease of operation
If multiple valves are used to control fluid flow in the flowline, then fluid isolation and sampling can be achieved, but device complexity and space requirements increase
Solution Approach 1:
The patent combines multiple valve functions into a single integrated valve system. The flow control valve is designed to perform multiple operations including fluid isolation, sampling, and circulation control, thereby reducing the total number of valves required while maintaining full fluid management capability.
Solution Approach 2:
The patent designs the flow control valve as a universal component that can perform multiple functions: isolating formation fluids, directing flow to different destinations (sampling chamber or circulation line), and controlling pressure. This multi-functional valve eliminates the need for separate specialized valves for each function.
3Ease of operation
If samples are conveyed from one container to another during transportation, then sample transfer can be achieved, but sample damage and contamination occur
Solution Approach 1:
The patent performs all necessary fluid analysis operations downhole before sample transportation. By completing characterization measurements while fluids are in their native environment, there is no need to repeatedly transfer samples between containers during transportation, thereby preserving sample integrity.
Solution Approach 2:
The patent extracts only the necessary information from the formation fluids through downhole sensing and analysis. Rather than physically transporting the actual fluid samples to the surface, the system extracts compositional and physical property data in-situ, eliminating the need for sample transfer operations that would cause damage or contamination.
4Measurement precision
If comprehensive laboratory analysis is performed on surface samples, then detailed fluid properties can be determined, but analysis time increases to weeks or months
Solution Approach 1:
The patent replaces the mechanical system of physical sample transportation and surface-based laboratory analysis with an automated downhole analysis system. Sensors and analyzers are deployed in the wellbore environment to perform measurements in-situ, eliminating the weeks or months required for sample logistics and surface analysis.
Solution Approach 2:
The patent introduces downhole sensors and analysis modules as intermediaries that enable real-time fluid characterization at the wellbore location. These intermediaries provide immediate data on fluid composition and properties without requiring physical sample transport to surface laboratories, reducing analysis time from weeks/months to real-time or near-real-time.
Data Source
AI summary
A fluid sampling and analysis module for a downhole fluid characterization apparatus configured for operation downhole, within a borehole. The fluid sampling and analysis module comprises a primary flowline for fluids withdrawn from a formation to flow through the fluid sampling and analysis module, a bypass flowline in fluid communication with the primary flowline and a single valve, interconnecting the primary flowline and the bypass flowline, operable to a first position for formation fluids to flow in the primary flowline and to a second position for formation fluids to flow, via the bypass flowline, in the primary flowline.