Silixa’s MiDAS flow meter enables  production allocation and process monitoring on well pads, separators and flow lines.

The MiDAS flow meter, which is based on the intelligent Distributed Acoustic Sensor (iDAS™), uses optical fibre attached to the exterior of a pipe to enable real-time and continuous monitoring of flow and composition within the pipe.

The system operates on pipe diameters from 2” upwards. It is bi-directional, non-intrusive and passive, with no power requirements at the sensing point.

Key benefits

  • Flexible architecture means that up to 10 measurement stations can be linked in series using a single sensing fibre and a single acquisition system
  • Sensor is entirely optical, and does not require electrical power at the measurement stations
  • Non-intrusive and easy to install
  • System can be retrofit to flowing pipes under cold work permit

Optical fibre attached to the exterior of the pipe enables real-time monitoring of multi-phase flow.

How does it work?

This system functions by both listening to the propagation of sound within a pipe and measuring the convection of coherent flow structures. Flow structure convection is used to monitor directly the flow velocity, while sound speed data provides information concerning both flow speed and fluid quality. Since the speed of sound is a function of fluid composition,  acoustic data can be used to derive gas void fraction (GVF) within a bubbly liquid, or the water within in liquid ratio (WLR) for a water-oil mixture.

As a result of the unique distributed sensing architecture, flow metering sections can be linked in series, such that it is possible to monitor the flow at up to 10 measurement stations simultaneously by using a single fibre optic line and a single acquisition system.

Sound speed data, obtained directly from the MiDAS system, provides information concerning both flow speed and fluid quality.


Watch our distributed acoustic flow meter demonstration here.