Downhole Fluid Analyzer Plasma Emission Unit
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Solution Overview
Problem
Current downhole formation evaluation methods lack efficient and precise techniques for analyzing downhole fluids to determine the presence and composition of hydrocarbons in subterranean formations, particularly in real-time and under in-situ conditions.
Innovation Solution
A downhole fluid analyzer equipped with a microflowline and a plasma emission unit, featuring electrodes that vaporize and ionize the downhole fluid to generate plasma emissions, which are then measured by a plasma detector to identify components, allowing for real-time analysis of downhole fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional downhole fluid analysis methods are used, then the analysis can be performed with simpler equipment, but the precision and real-time detection capability are insufficient
Solution Approach 1:
The system divides the fluid analysis function into separate modules: a microflowline for fluid transport, a plasma generation unit with electrodes, and a plasma detector. This segmentation allows each component to be optimized for its specific function while maintaining overall system precision.
Solution Approach 2:
The microflowline is positioned within the downhole flowline, and the plasma generation electrodes are nested within the microflowline structure. This nested arrangement enables precise fluid analysis without requiring a completely separate external system, balancing precision with manageable complexity.
2Productivity
If a microflowline is used instead of a downhole flowline, then the plasma generation efficiency is improved, but the device requires more precise manufacturing
Solution Approach 1:
The microflowline has specific localized dimensions (diameter of 0.001 to 1 mm, length of 0.01 to 1 m) that are optimized for plasma generation efficiency. This local quality approach allows the microflowline to achieve high productivity in specific regions without requiring the entire downhole tool assembly to be manufactured with equally high precision.
3Loss of time
If plasma emission technology is implemented, then real-time fluid component detection is enabled, but the energy consumption increases
Solution Approach 1:
The system generates plasma emissions continuously at a level sufficient for real-time detection of fluid components. This partial action approach maintains a constant plasma state in the microflowline, enabling immediate detection without time delays, while the energy consumption is managed by optimizing the electrode configuration and plasma generation parameters.
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 precise and real-time detection of hydrocarbon components and other materials in downhole fluids, improving the accuracy of formation evaluation and hydrocarbon detection, even under challenging downhole conditions.
Implementation Method 1
electrodes positionable in the microflowline to generate an electrical field therebetween and to vaporize the downhole fluid passing therebetween
Implementation Method 2
vaporize the downhole fluid passing therebetween whereby plasma emissions are generated from the downhole fluid
Implementation Method 3
a plasma detector to measure plasma emissions whereby components of the downhole fluid are detectable
Data Source
AI summary
A fluid analyzer of a downhole tool positionable in a wellbore penetrating a subterranean formation is provided. The wellbore has a downhole fluid thereabout. The downhole tool has a downhole flowline for receiving the downhole fluid. The fluid analyzer includes a microflowline fluidly coupled to the downhole flowline to receive the downhole fluid therethrough, a plurality of electrodes positionable in the microflowline to generate an electrical field therebetween and to vaporize the downhole fluid passing therebetween whereby plasma emissions are generated from the downhole fluid, and a plasma detector to measure plasma emissions whereby components of the fluid are detectable.