StatoilHydro Developments Paying Off

Tuesday, October 20, 2009
Photo courtesy StatoilHydro

Better drilling methods are making the single biggest contribution to improving recovery from Norway’s offshore fields. A number of solutions adopted by StatoilHydro this year are already yielding good results.

“Downhole intervention and sidetracks from existing wells are the most effective ways of recovering more oil and gas from subsea fields,” said head of subsea technology, Øystein A. Håland. “Adopting new solutions in these areas also yields substantial reductions in operating costs.”

A growing number of discoveries on the Norwegian continental shelf are being developed with subsea installations. At the same time, production is declining from mature fields. Wells need workovers to maintain their output by removing deposits and halting water intrusion. But conventional jobs of this kind have been expensive on subsea developments.

StatoilHydro has now adopted light well intervention (LWI) vessels on a large scale, with two such ships in operation all year round on the NCS.

Compared with the use of traditional drilling rigs, these units cut the cost of well intervention work for the group by 50-70%.
 
Wireline
During LWI, downhole equipment is remotely operated via a wireline from the surface and – unlike rigs – without a riser. A monohull is also much faster to redeploy than a moored semi-submersible.

“We’ve conducted about 90 LWI operations since starting with these,” reported Øyvin Jensen, head of this activity at StatoilHydro. “They’ve all been successful and have shown good results for health, safety and the environment.”

StatoilHydro has been pursuing riserless wirelining on subsea wells since 2003, with the technology being steadily improved.

“We expect LWI to earn us about NOK 15 billion in 2009,” said Jensen. The group operates some 500 subsea wells on the NCS, which account for more than 40% of its oil and gas production.

Earlier this autumn, StatoilHydro reported a successful first use of through tubing rotary drilling (TTRD) for a sidetrack drilled directly out from the production tubing in an existing well. The company is now in the market to acquire a rig purpose-built for such operations, and hopes to have this new unit in place by 2012-13.

“Our ambition is that this technology will allow us to cut costs for such well interventions by 40%,” said Håland.
 

Maritime Reporter September 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Offshore

Partners Deliver Modular Floating Tidal Energy Platform

A group of offshore companies, including Bluewater, Damen and Van Oord among others, has partnered for a floating tidal energy platform a project to generate clean electricity,

Statoil Invests $1.5b in US Offshore Project

Statoil together with co-owners in the Stampede development in the Gulf of Mexicohas sanctioned the Stampede project in the U.S. Gulf of Mexico. Statoil said it will invest $1.

Experimental Floating Wind Farm Nears Installation

Launched in March 2012, the Fukushima experimental offshore floating wind farm project sponsored by the Ministry of Economy, Trade and Industry is nearing the installation

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Naval Architecture Navigation Offshore Oil Pipelines Ship Electronics Ship Repair Ship Simulators Sonar
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1388 sec (7 req/sec)