Distributed temperature sensing (DTS) is the most common fiber-optic measurement used for steam-assisted-gravity-drainage (SAGD) reservoir monitoring. In 2013, Devon Canada installed DTS in the trial production well at its Jackfish 2 asset. DTS was installed parallel to existing standard instrumentation. In early 2015, a distributed-acoustic-sensing (DAS) fiber-optic line was added in parallel along with multimode optic fiber, allowing simultaneous logging of DTS and DAS. DAS helped to improve confidence in and extend the definition of wellbore effects observed with DTS.
Background
DTS with a fiber-optic cable has been established as a reliable and tested method for monitoring thermal wellbores in heavy-oil production.
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