Most Gulf Arab states are expected to run comfortable budget surpluses and continue to raise spending this year as higher oil prices help recovery in the world's top crude exporting region.

Oman booked a surplus of 100.9 million rials in the same period a year ago and 421.2 million in the first quarter of this year.

The sultanate's revenue jumped 41.9 percent to 2.940 billion rials in the four months to the end of April from a year ago, while expenditures rose 13.0 percent to 2.228 billion, the data showed.

Over the same period, Oman's net oil income doubled to 1.989 billion rials from 999.0 million a year ago.

"I expect Oman ... to even make a small overall surplus for the year with the expected strong oil prices to prevail this year," said Saadoon Fayedh, analyst at Muscat Capital Investments.

The non-OPEC country sold its oil at an average price of $75.98 a barrel in January-April, up 70.4 percent from the same period of 2009.

Oman based its 2010 budget on a projected oil price of $50 a barrel and expected a deficit of 800 million rials given plans to finance a range of infrastructure projects.

Analysts polled by Reuters expected the country to post a surplus of 3.8 percent of gross domestic product in 2010.