Equinor has conducted a controlled  closure of fields Gudrun, Gina Krog, Kvitebjørn, and Valemon due to 54 members  of the trade union Lederne stepping up its strike on the Norwegian continental  shelf on Oct. 4 at midnight. Neptune Energy’s Gjøa field and Wintershall Dea  Norway’s associated Vega field also will shut down. 
As the fields produce 330,000 boe/d of the Norwegian shelf’s  4 million boe/d oil and gas production, some 8% of the shelf’s total oil and  gas production may be curtailed.
Production at Johan Sverdrup currently continues despite 43  members of Lederne being on strike there since Wednesday morning.
The strike is the result of a break in negotiations between  the employer organization Norwegian Oil and Gas Association and Lederne on Sept.  30.
If mediation fails, fields Johan Sverdrup, Kristin including  Tyrihans and Maria, Aasta Hansteen, Kvitebjørn including Valemon and Snorre B,  risk closing down, resulting in a daily production loss of around 900,000 boe  corresponding to about 22% of the total daily production of oil, gas,  condensate and NGL on the Norwegian shelf. Other fields where strikes are  reported have no immediate consequences for production.