Adds quotes, background OSLO, Nov 16 (Reuters) - Norwegian oil and gas companies plan to invest more in 2023 and 2024 than previously thought as inflation drives up the cost of field developments, a national statistics office (SSB) survey showed on Thursday. "These increased costs will probably not contribute much to expanded production capacity more than initially planned," it added. In September, Equinor EQNR.OLsubmitted a 4 billion-crown plan for development and operations (PDO) for its Eirin gas discovery in the North Sea.