ForeSite® Sense Optical System Enabled Advanced, Real-Time Insight in CCS Reservoir Surveillance for CO2 Injection Well

Provide an integrated downhole surveillance system as part of a carbon dioxide (CO₂) injection well completion design. An energy customer in France executed a carbon capture-transport-storage pilot project as part of its commitment to reduce greenhouse gas emissions. The project required technologies for monitoring of downhole CO₂ conditions and reservoir caprock integrity during injection, and continued monitoring post injection.

After extensive collaboration and assessment of the project requirements with the customer, Weatherford proposed a customized solution with the ForeSite Sense optical system.
The ForeSite Sense optical system provides permanent reservoir monitoring in moderate to ultra-extreme well conditions. The gauge can be combined with multiple ForeSite Sense optical gauges or other optical sensors on a single fiber or cable, which provides comprehensive multiparameter downhole sensing for well production, injection, storage, and monitoring.
The gauge has minimal parts and no in-well electronics. It is immune to electromagnetic interference, which enables functionality while using other electrical completion components.
Weatherford installed optical pressure/temperature (P/T) gauges and seismic sensors at various depths and connected via a downhole optical cable to the surface. The seismic sensor was conveyed on completion tubing to depth which was then activated with a rupture disc during commissioning to enable direct contact with casing (formation). Sensor orientation was confirmed with a wireline tag to correlate offset vibrator source.

Weatherford’s ForeSite Sense optical system delivered continuous, real-time P/T insight of the CO_2, conditions in the well during the critical injection phase.
In addition, the system successfully monitored, measured, and verified CO₂ storage reservoir and caprock integrity by delivering continuous data from the optical P/T and micro-seismic monitoring and periodic vertical seismic profile (VSP) survey.

Details

Location

France

Well Type

Onshore, carbon dioxide injection

Formation

Depleted gas field

Casing Size

7 x 3-1/2 in., completion

Depth

14,435 ft (4,400 m)

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ForeSite^® Sense Optical System