Time-Lapse 4D Seismic
Achieve accurate reservoir monitoring with expert time-lapse 4D seismic imaging
Accurate reservoir monitoring using time-lapse 4D seismic relies on expert processing and imaging of often complex and disparate multi-vintage data, recorded using streamer, land or ocean bottom seismic acquisition – or a combination thereof. The base and all monitor surveys need to be considered together, taking a holistic approach that optimizes results for the 4D signal, rather than an individual data set. Complementing the extensive experience of our staff in judging such a fine balance, we use 4D cost functions to balance what is best for processing and what gives the best 4D signal.
Our expertise and technology allow us to attenuate 4D noise (caused by changes in acquisition parameters or environmental conditions) while emphasizing the 4D signature of the reservoir (caused by production-related changes in fluid, pressure and stress within the reservoir). Our dedication and reliability is reflected in multi-year repeat work on long-term projects, described as permanent reservoir monitoring (PRM) or life-of-field seismic (LoFS), for example over the Ekofisk, Snorre, Grane and Johan Sverdrup fields in the Norwegian North Sea.