Atlantis time‐lapse ocean bottom node survey: a project team's journey from acquisition through processing

Practical Applications of Time-lapse Seismic Data

“…Generally, the timeshift inversion methods minimize a cost function given by the monitor-baseline difference. Rickett et al (2007) point out that if time shifts are large enough to cause cycle skipping, their inversions become even more nonlinear. In addition, inversion methods typically assume that wave propagation is vertical, that changes in reservoir properties are mainly in the velocity and are not influenced by density, and that the seismic traces are nearly zero offset (Williamson et al, 2007).…”

“…Rickett et al (2007) point out that the time strain is an interval property and can be interpreted more directly than time shifts can. As discussed in Chapter 3, a solution is to differentiate the time-shift volume to obtain the fractional change in traveltime (Δt/t), which is also known at the time strain.…”