Q&A · 38:25-38:39

What is 4D seismic analysis?

The fourth dimension in a seismic survey is repeated measurement over time, allowing analysts to observe changes in subsurface activity.

Oceanographic Data Seismic Survey Ships Sensor Systems

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Question

What does 4D analysis mean for a seismic survey ship?

Short answer

It repeats measurements over time so analysts can track changes in seismic or subsurface activity.

Notes

A 4D seismic survey adds time to the surveyed volume. Measurements taken on different occasions allow comparison between successive surveys. Those comparisons reveal fluctuations in seismic activity.