SEISMIC SURVEYING
exploratory wells the company intends to drill upon completion and interpretation of the new data. Te first well is anticipated to be spudded in the second quarter of 2012. Manas has also commenced the second
seismic survey on CJSC Somon Oil Company’s West and North West licenses in the Republic of Tajikistan. Tis programme includes up to 774km of 2D seismic survey, which up to 115km will be acquired over the WEST license and up to 659km will be acquired over the North West license. An additional 24km will extend across the Kyrgyz/Tajik border into Manas’ Tuzluk license in the Kyrgyz Republic. Somon Oil, a 90 per cent owned
subsidiary of DWM Petroleum, signed the agreement for seismic services with the Tajikistan branch of the Kazakh company, DANK Scientific Industrial Firm which has extensive experience in the hydrocarbon exploration industry. Tis seismic survey is also being carried
out to improve the quality of the existing prospect data so that exploratory wells will be more successful. Te first well is anticipated to be spudded at the end of the first quarter of 2012.
Neil Patterson, md of OSD-IMT, the UK arm of OSD, says: “We worked closely with Grandweld during the tender period and following their selection as one of the short-listed bidders, we assisted them technically during the successful contract negotiation process, and are pleased to have been entrusted with the design of these new vessels.”
At-sea maintenance Te vessels will be chartered by Bourbon to CGGVeritas with delivery of the first vessels set for the end of 2012. Tey will be used to support the fleet of CGGVeritas seismic survey vessels operating all over the world, providing services including crew change, fuel delivery, storage, assistance and support during at-sea maintenance operations. Operational requirements of the design include: cargo runs from port to the mother ship; transfer of fuel, potable water, dry and refrigerated stores and general cargo to the mother ship; transfer of crew to and from the mother ship; accompanying the mother ship when conducting seismic operations; towing of the mother ship when conducting seismic operations; and retrieval of streamer cables.
vessel design, streamer and source technology, and streamer and source handling technology.
Worldwide support With offices in Cork, Foynes, Limerick, Drogheda, Durban, Johannesburg and Aktau, Mainport is an integrated marine services company which provides a full range of marine services to seismic survey companies and others involved in the maritime trades. Te company offers ship agency,
stevedoring, oil base management and warehousing services. In terms of ship owning services, Mainport offers: offshore support vessels covering safety standby, tugs, tanker assist, towage, bunkering and seismic support services (Fig. 2). In Sept 2005 Mainport won a contract for
the provision of a seismic support vessel from French seismic company CGG. Te company has since added a further four vessels to this division, supporting in addition to CGG, Western Geco and Wavefield Inseis. Te Mainport Oak, Mainport Ash, Mainport Elm and Seahorse Supporter all operate as seismic support vessels worldwide. Tis division operates under the Mainport International Corporation banner. In late 2011 Mainport announced that
it had taken the anchor handling tug supply (AHTS) vessel Dian Alliance on charter from a Norwegian company and converted her for seismic support duties. Te ship is currently operating in the North Sea, servicing three seismic vessels for clients.
Fig. 2. Mainport offers a range of seismic support vessels around the world.
Investment grows Offshore Ship Designers (OSD) has been chosen to design a series of six new fuel- efficient seismic support/chase vessels ordered by French offshore major Bourbon to be built at Dubai’s Grandweld Shipyards. Te 53 metre vessels will have a fuel-efficient hybrid propulsion system delivering a flexible economic solution for the varied conditions required to support seismic survey vessels including transit speed, slow speed escort and support work and a high manoeuvrability.
7 IHSS
Key to the new vessels is their propulsion system, which consists of two main marine diesel propulsion engines, two controllable pitch propellers in nozzles, two main gearboxes each with a power-take-in (PTI) electric propulsion motor and three diesel- driven generating sets, and two electrically- driven bow tunnel thrusters. As pioneers in 3D seismic since the early 1990s, Petroleum Geo-Services (PGS) has continuously changed the exploration landscape through technologies related to
Vessel management Nautika is a ship management company specialising in the management of its own vessels and those of other ship owners for the offshore oil and gas industry and is a provider of seismic support vessels. Nautika was incorporated in Brunei in 1991 and became fully operational and registered marine contractor in Negara Brunei Darussalam in 1992. Since then the company says that it has gained reputation as a safe, efficient, quality marine operator both within Brunei waters and throughout South and South East Asia. Te company’s operations include a
Brunei shore base with a compliment of trained marine professionals qualified to provide vessel technical and maintenance services. Nautika has a long history in providing supply and support vessel to the offshore seismic industry and is operating regionally from Sakhalin to Darwin to India and points in between. Te company currently has three seismic vessels available.
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