Downhole Flow Conditioning for Zone Measurement
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Solution Overview
Problem
Accurate measurement of fluid flow in downhole applications, particularly in multi-zone wells, is challenging due to difficulties in determining individual zone contributions without impeding main production tubing access, and existing methods often require complex installations that restrict bore access and increase intervention risks.
Innovation Solution
A downhole measurement system comprising a flow conditioning section that homogenizes fluid flow using labyrinth or spiral pathways, followed by a measuring section with integrated sensors to characterize fluid parameters, allowing for precise measurement without restricting the main bore access, and can be adapted for both producer and injector wells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If downhole measurement devices are installed in each producing/injecting zone to characterize flow contribution, then measurement precision is improved, but device complexity and difficulty of installation increase
Solution Approach 1:
The measurement system is divided into separate functional modules: a flow conditioning section with labyrinthine pathways for homogenizing multi-phase flow, and a measuring section with sensors for characterizing fluid properties. This segmentation allows each module to perform its specific function optimally while simplifying overall system installation and maintenance in downhole environments.
2Measurement precision
If complex installation methods are used to measure individual zone contributions, then measurement precision is improved, but ease of operation deteriorates due to restricted bore access
Solution Approach 1:
The measurement system is designed as a nested structure that fits within the existing production tubing bore. The flow conditioning section and measuring section are integrated into a compact assembly that can be installed within the limited downhole space, maintaining full bore access while enabling precise zone contribution measurements through strategic placement of sensors and flow conditioners.
3Measurement precision
If measurement devices are installed in the main bore, then measurement precision is improved, but productivity deteriorates due to restricted access
Solution Approach 1:
The system implements local flow conditioning using labyrinthine pathways and static mixers at specific measurement locations, rather than restricting the entire bore. This allows precise fluid flow characterization to be achieved in localized zones while maintaining unrestricted access and full productivity in the main production bore.
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 accurate characterization of fluid flow contributions from each zone with reduced intervention needs, minimizing operational costs and risks, and maintaining full bore access, thus improving well management and productivity.
Implementation Method 1
The flow conditioning section may include a labyrinth flow pathway
Data Source
AI summary
A downhole measurement system may comprise an optional fluid inlet section configured to accommodate fluid flow between a well and a zone surrounding the well. The system may further comprise a flow conditioning section configured to receive the fluid from the fluid inlet section. The flow conditioning section may be configured to produce a substantially homogenized fluid flow. In addition, a measuring section may be provided and configured to measure at least a portion of the fluid flow from the flow conditioning section. The measuring section characterizes a parameter of the fluid flow. In other embodiments, there may be a method for characterizing a parameter of a fluid flow comprising the steps of directing the fluid flow to a flow conditioning section. Other steps may be conditioning the fluid flow to a substantially homogeneous state and measuring a parameter for at least a portion of the fluid flow.