Compact Multiphase Flow Separator Using Segmented Piping
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Solution Overview
Problem
Conventional methods for measuring multiphase flow in oil wells are impractical for individual well production testing due to large size, high cost, and limited accuracy, especially as water cut increases, leading to questionable results and delayed problem detection.
Innovation Solution
A compact apparatus using piping segments to separate and measure oil and water streams within a multiphase flow system, eliminating the need for large vessels and employing actuated control valves and interface detection devices to ensure accurate flow rate measurement of oil and water phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional three-phase or two-phase separators are used for multiphase flow measurement, then phase separation and measurement can be accomplished, but the physical size becomes large, construction cost increases, and ancillary equipment requirements increase
Solution Approach 1:
The separator is divided into multiple chambers (first chamber for gas-liquid separation, second chamber for oil-water separation) that are connected in series. Each chamber performs a specific separation function, allowing the system to achieve three-phase separation using compact piping segments rather than a single large vessel.
Solution Approach 2:
The invention transitions from using large horizontal or vertical separator vessels to a compact arrangement of piping segments connected in series. The separation process is distributed across multiple dimensional spaces (horizontal piping, vertical chambers, inclined sections) rather than requiring a single large volume.
2Measurement precision
If conventional three-phase or two-phase separators are used for multiphase flow measurement, then phase separation can be achieved, but construction cost and ancillary equipment requirements increase
Solution Approach 1:
The separator is divided into multiple chambers (first chamber for gas-liquid separation, second chamber for oil-water separation) that are connected in series. Each chamber performs a specific separation function, allowing the system to achieve three-phase separation using compact piping segments rather than a single large vessel.
Solution Approach 2:
The compact separator performs multiple functions (gas-liquid separation, oil-water separation, flow measurement) within a single integrated apparatus. The interface detection device and control system provide automated multi-phase measurement capabilities, reducing the need for separate measurement equipment.
3Ease of manufacture
If a single test separator is used to production test a group of wells, then equipment cost is reduced, but individual well testing duration is limited and problem detection is delayed
Solution Approach 1:
The invention enables continuous, long-duration testing by providing accurate real-time measurement of individual well production. The automated interface detection and control system maintains stable operation over extended periods, allowing wells to be tested continuously rather than requiring frequent reconfiguration or shutdowns.
4Quantity of substance
If water cut in the liquid stream increases, then production from mature reservoirs is reflected, but net oil measurement resolution decreases and accuracy is lost
Solution Approach 1:
The separator is divided into multiple chambers (first chamber for gas-liquid separation, second chamber for oil-water separation) that are connected in series. Each chamber performs a specific separation function, allowing the system to achieve three-phase separation using compact piping segments rather than a single large vessel.
Solution Approach 2:
The invention replaces manual or indirect measurement methods with automated electronic detection. The interface detection device uses electrical conductivity or capacitance sensors to automatically detect and measure the oil-water interface position, providing continuous digital signals that are processed by a control system to calculate accurate oil and water flow rates even at high water cuts.
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 continuous, accurate, and cost-effective measurement of oil and water flow rates in individual oil wells, maintaining high resolution even with increasing water cut, facilitating timely detection of production issues.
Implementation Method 1
separates the multiphase fluid stream into a gas phase and a liquid phase
Implementation Method 2
separates the liquid phase into a water phase and an oil phase
Data Source
AI summary
An apparatus is utilized for obtaining flow measurements from an individual oil and gas well. The apparatus utilizes pipe segments rather than vessels to separate the fluid components into a gas phase, a water phase, and an oil phase. Separation of the flow stream into the different phases allows the measurement of a particular phase. Because the oil stream may continue to contain a small amount of water, a water cut meter may be employed to determine the water content in the oil stream. The apparatus may be configured as a skid package to facilitate transportation and installation of the unit.