Qteq’s FibreTraq distributed temperature sensing (DTS) and distributed acoustic sensing (DAS) systems make use of optical fibre as both a sensing element and as a conduit for transmitting optical measurements.

As a sensing element, exposure to temperature and acoustic energy induces micro strain in optical fibre, with light transmitted down the fibre used to detect this micro strain at length intervals determined by a surface interrogation unit.

Distributed fibre optic monitoring technology offers high spatial and temporal profiling over large surfaces, long lengths and at locations where conventional sensing is not applicable nor cost-effective.

This means FibreTraq DAS and DTS technology offers an unprecedented variety of applications, spanning all georesource sectors, profiling surfaces and downhole processes, equipment and plant, at scales varying from centimetres to kilometres, and at high spatial resolution.

In downhole applications, the exceptional sensitivity and repeatability of DAS and DTS profiles also enables this technology to accurately detect subtle and trend changes in reservoir and well conditions over time.

With no fragile nor temperature-sensitive downhole componentry required, FibreTraq optical distributed sensing systems are also extremely robust and provide long-term reliability.

As such, our technology can be deployed for life-of-well applications, from initial drilling through to well abandonment, representing an exceptionally cost-effective investment in terms of well integrity, flow and reservoir assurance.

FibreTraq optical fibre can also be integrated with electrical tubing encapsulated conductor (TEC) cable using ResTraq point pressure and temperature monitoring systems to provide both distributed and multi-point sensing capabilities.

Just as we offer a wide range of pressure sensor types for use with our ResTraq platform, our FibreTraq optical sensing systems are compatible with a variety of single mode (SM) and graded index multimode (MM) fibres to suit in-well conditions and target applications.

In standalone applications, we design and customise our various fibre optic armoured cable constructions to suit specific downhole environments.

Applications

• Cement bond evaluation

• Multi-stage hydraulic fracture stimulation effectiveness

• Fracture fluid flowback profiles

• Production and injection flow profiles

• Identify zones for re-stimulation or shut-off

• Gas lift optimisation

• Micro-channelling behind casing

• Casing or tubing leak detection

• Post-well abandonment integrity