Multiphase Flow Meter Water Property Compensation
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Solution Overview
Problem
Measuring flow rates of multiphase fluids, which often consist of water, oil, and gas, is complex due to variations in fluid properties like salinity, making it challenging to accurately determine characteristics such as flow rates and phase fractions without separating the phases.
Innovation Solution
A multiphase flow meter system that emits and detects nuclear and microwave radiation, measures temperature and microwave complex permittivity, and compensates for changes in water properties by using empirical transformations and look-up tables to determine nuclear mass attenuation coefficients, allowing for real-time adjustment of measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional separator systems are used to measure multiphase fluid flow rates, then measurement accuracy can be maintained, but device complexity and size increase significantly
Solution Approach 1:
The patent combines multiple measurement functions (nuclear phase detection, microwave salinity measurement, temperature sensing) into a single integrated multiphase flow meter assembly. The nuclear detector and microwave sensor are positioned to measure different properties of the same fluid stream simultaneously, eliminating the need for separate separator systems while maintaining measurement accuracy.
Solution Approach 2:
The flow meter assembly performs multiple functions: nuclear radiation detection for phase identification, microwave complex permittivity measurement for salinity detection, and temperature measurement for fluid characterization. This multi-functional approach replaces traditional separator systems that would require multiple dedicated devices for each measurement type.
2Device complexity
If multiphase flow meters are used without separation, then device size and weight are reduced, but measurement precision deteriorates due to fluid property variations
Solution Approach 1:
The system uses microwave complex permittivity measurements to continuously monitor water salinity and temperature conditions. This feedback information is used to adjust the nuclear mass attenuation coefficients in real-time, compensating for fluid property variations and maintaining measurement accuracy without requiring phase separation.
Solution Approach 2:
The patent dynamically adjusts measurement parameters (nuclear mass attenuation coefficients) based on measured fluid properties (salinity, temperature). By changing these parameters in response to actual fluid conditions, the system maintains precision despite measuring multiphase fluids without separation.
3Ease of operation
If water salinity variations are not compensated for, then device operation is simpler, but measurement precision deteriorates due to changes in nuclear mass attenuation coefficient
Solution Approach 1:
The microwave complex permittivity measurement acts as an intermediary that indirectly detects water salinity. This intermediary measurement enables the system to compensate for salinity effects on nuclear mass attenuation coefficients without requiring direct salinity measurement or complex chemical analysis, maintaining operational simplicity while improving precision.
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 and efficient measurement of flow rates and phase fractions in multiphase fluids by compensating for changes in water salinity and other properties, improving the precision of fluid characterization without the need for phase separation.
Implementation Method 1
emit and detect microwave radiation
Implementation Method 2
measuring a microwave complex permittivity of the multiphase fluid
Implementation Method 3
emit and detect nuclear radiation
Implementation Method 4
nuclear mass attenuation coefficient for water
Data Source
AI summary
A method for compensating for changes in a property of water in a multiphase fluid during analysis of the multiphase fluid is provided. In one embodiment, the method includes providing a multiphase flow meter system configured to emit and detect nuclear radiation, to emit and detect microwave radiation, and to analyze a received multiphase fluid. The method can also include measuring a temperature and a microwave complex permittivity of the multiphase fluid. Further, the method includes compensating for changes in the property of water in the multiphase fluid during analysis of the multiphase fluid by using an empirical transformation between the fluid temperatures, microwave complex permittivities and nuclear mass attenuation coefficients for mixtures of different waters expected to be produced and received by the multiphase flow meter system. Additional systems, devices, and methods are also disclosed.