Improvements in 4D Seismic Processing - Foinaven 4 Years On

Using a case history from West of Shetlands, the impact of improvements in seismic processing technology over the last 4 years on 3D imaging and 4D seismic repeatability is demonstrated. We show that the quality of the 4D dataset has been greatly improved, with a reduction of background noise and therefore a better stand-out of the 4D difference. NRMS levels have decreased from 0.31 to 0.14 with this new processing sequence. A combination of processes is contributing to the repeatability improvement. The quality of the final result is therefore due to a mix of new technology, the use of previous processing results and the continuous work of fine-tuning the 4D sequence.