The Fibre That Listens: Distributed Acoustic Sensing in Wells and Pipelines

Deep End Era. Engineering with Sankalp · Oct 28, 2026 · 1h 1m

Pipeline integrity engineer Mira Hassan hears a third-party dig alarm on a buried fibre along a gas line, while borehole geophysicist Jonah Okonkwo records a vertical seismic profile without a geophone string. This episode builds distributed acoustic sensing from first principles: why coherent Rayleigh backscatter turns the fibre into a distributed interferometer; how interrogators in the optical time-domain reflectometry family measure phase or intensity; what gauge length, pulse length, spatial sampling and acoustic bandwidth really mean; why Raman D T S, Brillouin strain-temperature…