Rune Tenghamn

A Dual-Sensor, Towed Marine Streamer; Its Viable Implementation And Initial Results

In 1947, Roy Paslay, George Pavey and Pershing Wipff invented the towed marine streamer (Lawyer et. al., 2001; Paslay et. al., 1956). Since that time, there have been many improvements in streamer technology. However, one aspect of that technology has remained fixed during the intervening 60 years; the type of seismic detector has remained the hydrophone. As a consequence, every recorded and finally processed reflection wavelet from marine streamers has been accompanied by a ghost reflection from the ocean’s surface. And the resulting filter effect on the recorded data has restricted streamer towing depths to a range of about six to nine meters. In this paper, we report on the successful addition of particle velocity sensors to a new dual-sensor towed marine streamer, and the geophysical improvements and advantages that result.

Mitigating seismic noise with an acoustic blanket— the promise and the challenge

Waterborne seismic noise is a broad category encompassing well-known noises like marine multiples, seismic interference noise, noise emanating from offshore structures and propagating into the marine environment, and even borehole-trapped noise. For several years, we have been studying the potential of bubble curtains for suppressing these types of noises.

Practical aspects of an innovative solid streamer concept

A new low noise solid streamer concept has been developed in cooperation between PGS and Teledyne. The new concept is based on an acoustically transparent solid fill material called BVF. The material has been specially designed for use in marine towed streamer acquisition systems, but is very likely to be of use in many geophysical sub-sea applications. This paper elaborates on the properties of the material, and the unique performance of the innovative solid streamer concept.