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Company News - DMT completes project in Munich.

Performed by DMT GbmH & Co, one of the largest ever inner-city 3D surveys came to a successful end last week. The Essen based technology service provider, contracted by Stadtwerke ME-nchen Services GmbH (Munich's municipal utilities company), had spent four months exploring deep underground in southern Munich by means of vibroseismic methods.

Stadtwerke ME-nchen (SWM) aims to switch all of its power to renewable energy by the year 2040. A prerequisite for this is, of course, finding suitable locations for new geothermal plants. Hence, SWM commissioned DMT to explore an area of approximately 170 square kilometers in a 3D seismic survey, which started in early November 2015.

'As far as I know, this project is the world's largest inner-city 3D seismic survey carried out to date,' explains Prof Dr Eiko Raakers, Chairman of the DMT Board of Management. 'The challenges of operating 26-tonne vibroseis trucks right in the middle of a city with a million-strong population are not to be underestimated. The conditions are miles apart from those we face in Ethiopia, for example, where another of DMT's seismic teams is currently in operation.'

Three such vibroseis vehicles produced the seismic waves during the seismic survey in Munich. The signal reflections were recorded at almost 8,000 recording points by applying 12 geophones at each location.

'The environment-friendly vibroseismic method is particularly suitable for built-up areas as it uses controlled signal sources and doesn't cause strong vibrations', explains Raakers. 'The main issue in the inner city, though, is traffic (buses, trams, refuse collection trucks), as well as temporary roadworks and the many pedestrians who try to quickly pass between the vehicles. The cable team had a difficult job, especially maintaining the cables, which were predominantly in cable bridges suspended in the air. Never before has a seismic survey been carried out with so many cable bridges, which also made assembly and dismantling considerably more complicated.'

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Publication:Oil & Gas News
Geographic Code:4EUGE
Date:Apr 4, 2016
Words:335
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