The Royal Bank of Scotland's oil and gas index for August shows oil revenues soared by 7.8% - up by 48.9% on the previous year - on the back of rapidly rising worldwide oil prices.
The latest figures show that, despite a downturn in production, the value of the output from Scotland's oil producers has soared.
The news will be of little comfort to hauliers, drivers and transport directors who have been hit by higher prices at the pumps.
Fuel pressure group leaders, who mounted a UK-wide protest last month, have threatened further action unless Chancellor Gordon Brown cuts duty on petrol and diesel.
Scotland was brought to a virtual standstill during the protest as farmers, lorry drivers and taxi drivers demonstrated at the BP Amoco refinery at Grangemouth.
The Royal Bank of Scotland's oil and gas index for August shows oil revenues soared by 7.8% - up by 48.9% on the previous year - on the back of rapidly rising worldwide oil prices.
The windfall came despite a fall in production of 2.6%, the second month to see output fall, and a 13.6% slump in the number of barrels produced compared with the previous year.
Stephen Boyle, the bank's head of business economics, put the soaring revenues down to the spiralling cost of oil, and said the pound's weakness against the dollar was also forcing up incomes.
He said: "Sterling's depreciation against the US dollar is an increasingly important factor in rising oil prices in the UK and accounts for a significant proportion of the rise in the sterling price of oil."
The figures show the value of oil production in August reached £48.9m each day, up from £32.5m in the same month in 1999.
Oil prices have spiralled since last year, reaching a peak of $35 a barrel in September.
Oil uncertainty
Mr Boyle added: "Other uncertainties about the short-term direction of prices are the severity of the winter in the northern hemisphere, the ability of Opec (Oil Producing and Exporting Countries) to increase production and the response of demand to higher prices."
The figures showed the long-term trend in expanding gas production continued in August despite a 0.2% fall in production on the previous month.
Production of natural gas was up 9% on the previous year, helping boost the combined oil and gas revenues for the North Sea, which increased to average £58.9m per day, a rise of 6.2% on the previous month and 43.2% on the previous year.