"The quantities are there. The main challenge is timing," Lakkotrypis told a news conference.
Charles Ellinas, the executive president of Cyprus National Hydrocarbons Co., told The Associated Press that a second appraisal well could delay the start of construction of the gas facility by possibly a year.
Speed is essential for cash-strapped Cyprus, which saw its banking sector crushed under a financial rescue that it agreed in March with its euro area partners and the International Monetary Fund. In exchange for a 10 billion euros ($13.6 billion) loan, uninsured depositors in the country's two largest banks were forced to take huge losses on their savings. The money was used to prop up largest lender Bank of Cyprus, while the smaller Laiki was wound down.
Cypriot officials have said that gas revenues remain a long way off and that the potential for future mineral wealth is no excuse for not following through with the economic reforms the country has to implement in exchange for its bailout loans.
But the authorities are hoping that the allure of a gas bonanza can help restore confidence in a shaky economy and attract investment. The country is grappling with a 17 percent jobless rate and will see its economy shrink by a cumulative 13 percent this year and next.
Lakkotrypis said preliminary estimates show that Cyprus stands to gain a net profit of 12-18 billion euros ($16.3 - $24.5 billion) over a period of 14 years just from the Aphrodite field.
Cyprus has also licensed France's Total and a consortium made up of Italy's ENI and South Korea's Kogas to search for offshore hydrocarbons in other 'blocks' or areas.
John Tomich, the head of Noble's Cyprus' operations, said seismic tests have yielded at least "half a dozen promising features" that may contain gas. Tomich said Noble is "very encouraged by the exploration potential" of the area for which it holds a gas exploration license.