Adds SSB quote, 2024 investment forecast OSLO, May 25 (Reuters) - Norwegian oil and gas companies have increased their investment forecasts for 2023 and 2024 due to cost inflation, a national statistics office (SSB) survey showed on Thursday. Some of the increase in the estimate is related to the growth in the prices of many investment goods," SSB added. Official statistics showed investment prices in the petroleum sector increasing by 8.1% in the first quarter from a year earlier.