Paper on natural seabed gas leaks published in Journal of the Acoustical Society of America

Good news! Rokas published his study on seabed gas leaks in Journal of the Acoustical Society of America.

Rokas Kubulius and Geir Pedersen: Relative acoustic frequency response of induced methane, carbon dioxide and air gas bubble plumes, observed laterally
The Journal of the Acoustical Society of America, 140, 2902-2912 (2016)



There is an increased need to detect, identify, and monitor natural and manmade seabed gas leaks. Fisheries echosounders are well suited to monitor large volumes of water and acoustic frequency response [normalized acoustic backscatter, when a measure at one selected frequency is used as a denominator, ()] is commonly used to identify echoes from fish and zooplankton species. Information on gas plume () would be valuable for automatic detection of subsea leaks and for separating bubble plumes from natural targets such as swimbladder-bearing fish. Controlled leaks were produced with a specially designed instrument frame suspended in mid-water in a sheltered fjord. The frame was equipped with echosounders, stereo-camera, and gas-release nozzles. The () of laterally observedmethane, carbon dioxide, and air plumes (0.040–29 l/min) were measured at 70, 120, 200, and 333 kHz, with bubble sizes determined optically. The observed bubble size range (1–25 mm) was comparable to that reported in the literature for natural cold seeps of methane. A negative () with increasing frequency was observed, namely, () of about 0.7, 0.6, and 0.5 at 120, 200, and 333 kHz when normalized to 70 kHz.Measured plume () is also compared to resolved, single bubble target strength-based, and modeled ().

Successful days at ONS 2016

Metas presented its technology at ONS Stavanger last week at the Innovation Park organized by NFR and Innovation Norway.

We received a lot of interest located next to Statoil. Statssekretærene Ingvild Smines Tybring Gjedde and Kjell Børge Freiberg from Oil and Energy Department with Arvid Hallen (Director of Research Council) visited the stand.


METAS AS gets new CTO

Pål Bjønnes started as our new CTO 1st of september. He is replacing Terje Torkelsen. Terje will still be working at Metas AS as a specialist.

Pål has more than 10 years of oil and gas experience, including both technical and managerial positions in Aker Solutions, Semar and Statoil. In his last position as a product owner for Statoil’s software solution WellSpot, he learned a lot about agile product development. Pål holds an MSc. In Shipping, Trade and Finance from Cass Business School and an MSc. In Marin Technology from NTNU – The Norwegian University of Science and Technology.

Welcome to Metas Pål!

METAS launches a new website

METAS launches a new website! What’s new? Now we provide users the possibility to create their own account, which gives an opportunity to download additional materials if available. Moreover, our wish was to become more modern and interactive (videos accompanying products, product prospects, etc.) at the same time.

METAS AS gets new CEO

Kenneth Olsvik started as our new CEO in May. He replace Olav Birkeland as CEO. Olav will still be working at Metas AS, but at a reduced position with special tasks.

Kenneth have been working in the international Oil and Gas industry for over 30 years holding Management position in sevaral companies like Siemens, Emerson Electric, Roxar, Bennex, and Sorbwater. His last position was as CEO for Sorbwater AS.

Rokas successfully defended his Ph.D


Multi-frequency acoustic discrimination between gas bubble plume and biological targets in the ocean

We are proud to announce that one of our colleagues Rokas Kubilius has successfully defended his Ph.D in underwater acoustics at the Biology Department of University of Bergen (UiB). Rokas has worked as an industrial PhD student since April 2011, supported by the Norwegian Research Council and Metas. As a student, he was involved at several vibrant institutions representing industry, academia and scientific research: Metas, UiB and Marine Ecosystem Acoustics research group of Marine Research Institute. His main topic was: Acoustic discrimination between biological objects and gas bubbles in the sea.

Read more about his project at the Research Council of Norway (article in Norwegian)

The overall objectives of industrial Ph.D grants are to increase the recruitment of researchers to Norwegian industry, to boost long-term competence-building and to enhance interaction between academia and industry.

The AALDOG project:

Development of active acoustic sensor platform for detection of oil and gas leaks from sub-sea infrastructure. This project is supported by Norwegian Research Council and Statoil.

The AKUGAS project:

Development of active acoustic sensor platform for detection of naturally occurring methane and carbon dioxide gas leaks from the ocean seabed. Supported by RFFV (Regional Forsknings Fond Vest).