First Break - Volume 15, Issue 4, 1997

Oil analyst Wood Mackenzie publishes an annual review of the top operating companies in the UK offshore sector. First Break takes a look at some of the key figures.

John Lander has a wealth of oil company experience from major to small independent. Andrew McBarnet talked to him about his view of the oil industry today, his new role as UK executive director of the ambitious independent British-Borneo and his term as president of the PESGB.

As is well known, seismic data contain a mixture of signal and noise (Sheriff 1978). A seismic signal refers to reflections from interfaces in the subsurface, where as noise is anything that obscures the signal. The noise can be separated into coherent and random noise and may have many different sources (Sheriff 1977; Yilmaz 1987). Coherent noise may result from effects such as cable noise, sea state noise, side-scattered noise, waterborn diffractions, propeller noise, acquisition geometry, multiples and peg legs (Yilmaz 1987).