FOSA Case Studies & Papers
Fiber optic sensing examples and technical papers.
We perform all measurements using a wireline deployment and monitor the well integrity in real-time with the FEBUS A1 placed in the control room of the PetroLS company wireline logging truck. For well monitoring, combined with DTS
temperature measurement, DAS is traditionnally used for its ability to access acoustic frequency range witnessing production events or leaks with high efficiency. We propose here to investigate the potential of the DTGS (Distributed Temperature Gradient Sensing) with low frequency DAS (<1Hz) to monitor leaks on the completion tubing of a well by direct comparison with conventional DTS monitoring. The main advantage of using DTGS with DAS is its sensitivity to small leaks, including the direction of propagation of the leak.