Qteq’s Insert ResTraq reservoir surveillance systems provide continuous, real-time downhole pressure data. The technology platform is highly flexible, enabling a variety of pressure sensor types to be incorporated into a freely-configurable, modular and extendable system architecture, tailored to suit well conditions.

The system architecture can be deployed through tubing, and without the aid of a workover rig. Insert ResTraq systems can therefore be installed in existing completed production or observation wells, for long-term production monitoring and reservoir surveillance.

This retrofit capability is made possible through use of an innovative capillary suspended system mounted on top of the wellhead. A bottom hole assembly toolstring, housing one or more downhole pressure gauges, is lowered on the end of one or more tubing encapsulated conductor (TEC) cables. This specially armoured TEC cable is spooled from a hydraulic spooling unit to the target sensing depth. Conventional wireline PCE is also used for installation of Insert ResTraq systems in live wells with pressure at the wellhead.

Once at setting depth, the TEC cable is anchored in the capillary suspension system, cut and then terminated into a Wellhead Outlet (WHO), sealed in a port through the Termination Cap. Once the pressure survey has been completed, or if the pressure sensor needs to be replaced, or even upgraded, the Insert ResTraq system can be retrieved using the spooling unit and optional wireline PCE.

This rig-less capability can be significantly more cost-effective than conventional, rig-deployed, permanently installed pressure-monitoring systems.

Applications

• Reservoir depletion surveillance

• Coal seam drainage monitoring

• Production monitoring

• Interference testing

• Hydraulic fracture stimulation monitoring

• Monitor pressure transients during planned and unplanned shutdowns