Water-Cut Analyzers

Introduction

Phase Dynamics Water-Cut Analyzers are precision real-time instruments developed specifically for use in the oil industry to measure the amount of water in oil for the petroleum industry. The Analyzers, also referred to as BS&W meters or basic sediment and water meters, are used in many applications including fiscal transfer, production monitoring, and well testing. The product line is based on the innovative sensing technology of oscillator load-pull. As the mixture of flowing liquids passes through the measurement section, the oscillator senses the entire cross section of the material and instantaneously shifts in frequency as the material composition changes. This frequency shift is a direct measure of material changes within the measurement section. From a sensor technology perspective alone, Phase Dynamics sets the standard.

For three decades, Phase Dynamics has supplied this product family globally to the top names in the oil industry. It is selected for many reasons including quality, reputation, repeatability, and stability. In addition, each analyzer manufactured by Phase Dynamics is factory calibrated, tested, and inspected under rigorous standards. Electronic components receive factory burn-in cycles to further improve quality and service life. Thorough documentation practices make each analyzer fully traceable for future reference.

Enclosure & Measurement Sections

The product family is highly customizable to meet the exact needs of the global market. Each Analyzer consists of a Measurement Section, an Electronics Enclosure Section, and an interconnecting system cable.

Measuring Range
Analyzers are available in six measurement range options to fit the application. For example, the Low Range Analyzer is typically used for custody transfer or pipeline applications whereas the Full Range is used for well testing and production applications where high water cut is present. The oscillators for each measurement range have been optimized to provide maximum load-pull to achieve best-in-class precision and repeatability.

Measurement uncertainty is expressed as the 95% confidence interval or two standard deviations. Oø denotes the water-in-oil emulsion phase, Wø denotes oil-in-water emulsion phase. Inversion refers to the emulsion phase change from water-in-oil to oil-in-water. The Full and High Range Analyzers offer Heuristic Salinity© as a product option to maximize measurement performance in applications where salinity change is also a process variable.

Parameter Low Range Mid Range Full Range High Range
Measuring Range 0-4% 0-10% 0-20% 0%-Inversion 0-100% 80-100%
Uncertainty (2σ) +/-0.04% +/-0.04%,0-4% +/-0.1%,4-10% +/-0.04%, 0-4% +/-0.1%, 4-10% +/-0.2%, 10-20% +/-0.5% +/-0.5% Oø, +/-1% Wø +/-0.6% Wø
Repeatability +/-0.02% +/-0.02% +/-0.1% +/-0.1% +/-0.1% Oø +/-0.5% Wø +/-0.3% Wø
Resolution 0.01% 0.01% 0.1% 0.1% 0.1% 0.1%

Touchscreen Display

The touchscreen display provides the user with a convenient touch-based navigation system.  This display option includes the data logging function.  In addition, graphing functions are provided that present trend data in an easily discernable format.  For Full Range and High Range Analyzers, the recommended Heuristic Salinity© option requires the touchscreen display.   

LCD Display

The explosion proof enclosures provide for user interaction through a 4-button interface in addition to the display selected.  The Fiberglass enclosures are configured in two ways.  When the touchscreen is purchased, user interaction is through the display.   When the 4-line LCD is purchased, user interaction is accomplished through a 4-button interface.

System power is supplied through either 100 to 240 Vac or 24 Vdc.  Typical power dissipation is 18 Watts, maximum power dissipation is 33 Watts.

The data interface includes MODBUS, HART, analog I/O, pulse input, and alarm relays.

The Enhanced Electronics package option includes:

  • 4 x MODBUS RTU
  • 1 x HART (opt.)
  • 1 x 4-20mA input
  • 1 x 4-20mA output
  • 1 x pulse input
  • 2 x alarm relays, 1A / 125Vac
 

The Expanded Electronics package option includes:

  • 4 x MODBUS RTU
  • 1 x HART (opt.)
  • 5 x 4-20mA input
  • 5 x 4-20mA output
  • 3 x pulse input
  • 2 x alarm relays, 1A / 125Vac
 

Flow Computer functions are provided with the inclusion of fluid flow as an input to the Analyzer.  Net Oil and Net Water results are then available for display and output through the data interface ports.

System Cable

A multiconductor system cable connects the Measurement Section to the Electronics Enclosure Section.  Standard lengths are available from 30 to 150 feet.

Documents
Product Video
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