OSLO, Dec 13 (Reuters) - Oil and gas companies operating in Norway are expected to invest 240 billion Norwegian crowns ($21.85 billion) in 2024, up from 220.5 billion in 2023, and more than previously expected, an industry group said on Wednesday.

Offshore Norway, which published the new forecast based on a survey of its members, had previously predicted 2024 oil and gas investments would amount to 194.3 billion crowns.

In the years after 2024 investments will gradually decline, to 166.5 billion in 2028 as major projects are completed.

Significant oil and gas companies in Norway include Equinor , Aker BP, Vaar, Conocophillips and Shell.

Norway is western Europe's largest oil and gas producer, with a total output of just over 4 million barrels of oil equivalents per day (boepd).

While the country aims to achieve net zero greenhouse gas emissions by 2050, it also continues to explore for and develop new oil and gas fields, including in the Arctic Barents Sea. ($1 = 10.9847 Norwegian crowns) (Reporting by Nerijus Adomaitis, editing by Terje Solsvik)