Dualstream Venturi Subsea
Dualstream Venturi is a low CAPEX solution for allocation or monitoring of gas flow rate. It is typically used on a per well basis. Installed either in the Xmas tree, removable choke bridge, jumper or manifold, it is ideal for high GVF applications. By only deploying standard sensor systems subsea, all flow computation is carried out topside, ensuring minimum intervention during the life of the field topside. Common applications include tie-ins to existing infrastructure or large multi-well fields where production fluids remain relatively constant throughout field life.
- Compact Design
- Low Power
- Industry Standard Computer
- Large Installed Base
- Regulatory Body Approval
Measurement Application
- Royalty Allocation
- Flow Line Monitoring
Measurement Technique
Dualstream wet gas Venturi
Wet gas correction algorithms
Liquid fraction from periodic well test
Operating Range
Gas mass fraction: 50-100%
Turndown: >8:1 typical
Water Liquid Ratio: 0-100%
Performance
Typical Uncertainty (95% confidence level):
Gas mass flow rate: <5%
Liquid mass flow rate from well test
Repeatability
Gas mass flow rate: <0.15%
Permanent Pressure Loss
Pressure loss specific to application (<1 bar)
Subsea Sensors
Solartron ISA SST range subsea sensors comprising:
Venturi differential pressure sensor with diaphragm seal (gauge pressure as secondary variable)
Temperature - Optional
Output options MODBUS, SIIS Level 2 (CANBUS) or IWIS
Subsea Power Requirement 24VDC < 10W
(includes redundant sensors supplied as standard)
Installation Requirements
Horizontal or Vertical Installation
Compact flowmeter design options are available for applications where installation envelope is restricted, please contact SolartronISA for details.
Topside Data Acquisition - Optional
Options available include
Dualstream Flow Computer (safe area)
Dualstream PC (safe area)
User Required Inputs
Compositional Data
Liquid Density
Liquid Fraction (from well test)