Iran is the number two producer in the Organization of Petroleum Exporting Countries and has partial control over the narrow Strait of Hormuz at the mouth of the Gulf.
The strait is an essential passage for crude oil from key producers such as Saudi Arabia, Kuwait, the United Arab Emirates, and Iraq.
Pourmohammadi's statements were the most specific yet, and the first explicitly targeting oil, in a series of threats levied by Iranian officials as the Security Council discusses what action to take over Iran's nuclear program.
Washington says Iran wants to produce atomic weapons. Iran denies that, saying it intends only to generate electricity.
''No means [for reprisals] will be ignored, and we will not disregard any means," said Pourmohammadi, who warned from the sideline of a Tehran city ceremony that Iran's critics could be underestimating his country's ability to strike back if sanctions are imposed.
Meanwhile, Russia has proposed a new round of high-level talks on resolving international concerns about Iran's nuclear program, in what diplomats characterized yesterday as an effort to head off a showdown in the Security Council.
A Western diplomat, who insisted on anonymity in detailing the confidential discussions, said Russia wanted a meeting with the United States, China, France, and Britain -- the other four permanent members of the Security Council.
The Russians also want the participation of Mohamed ElBaradei, head of the Vienna-based International Atomic Energy Agency, and also of Germany, which along with France and Britain had broken off talks with Iran last year after Tehran had resumed preliminary work on uranium enrichment.
