Marine seismic acquisition with autonomous marine vehicles towing 3D sensor arrays

Abstract

The use of autonomous systems in marine environments has increased in recent years and covers activities from oceanographic studies, environmental awareness, maritime surveillance, defense, and oil and gas. For oil and gas, the current applications are related to meteorological and oceanographic monitoring, hydrocarbon detection and mapping, subsea communication by means of acoustic modems, and localized real-time geomagnetic surveys. The concept of the three-dimensional sensor array was very recently introduced, specifically for autonomous marine vehicle applications to seismic acquisition. We show results from some of our field experiments and simulation studies to demonstrate the potential of this new type of seismic acquisition technology.

Design, modelling and imaging of marine seismic swarm surveys

“…The swarms can be increased in size, and for instance a number of AMVs can be kept available for very long offset profiles (Moldoveanu et al . ).…”

“…Surface AMVs towing and controlling underwater streamers have been developed and demonstrated by Moldoveanu et al . () and Haumonté (), whereas autonomous underwater vehicles equipped with seismic sensors have been proposed by Essaouari and Turetta () and Tsingas et al . ().…”

“…Moldoveanu et al . () discuss very long offset acquisition to aid full waveform inversion of streamer data.…”

Diamagnetic current measurements in a solid-state plasma

“…11 Only the electrons satisfy Eq. (4) and are magnetized at 1 T. The mobility increases with decreasing temperature.…”

“…A sensor able to directly measure pressure gradients would be of great benefit in many engineering and applied science fields, such as seismic exploration. [1][2][3][4] Considerable diamagnetic effects have been observed in gaseous plasmas. Diamagnetism is routinely used to monitor these plasmas, for example, in tokamaks 5 and other plasmas.…”