Libya's National Oil Corporation has summoned Russia's Gazprom to a meeting in Tripoli to discuss what the Libyans said was a breach of investment obligations — the first sign the new leaders are prepared to renegotiate Gadhafi-era contracts.

Although Libya's claims centre around a relatively minor issue — the failure of Gazprom to pay for student education — the move indicates the headaches awaiting global energy companies in the aftermath of the war.

And while the National Oil Corporation (NOC) has made it clear it will be receptive to proposals for compensation, the move also underlines the readiness of Libya's new rulers to act on any perceived lapses in commitment.

"They had to meet their obligations, and we will hear why they didn't fulfill them," NOC Chairman Nouri Berouin told Reuters in an interview.

The meeting, originally scheduled for Thursday, had to be cancelled as flights into Tripoli's airport were halted on concerns about gunfire across the skies of the capital following news of former leader Muammar Gadhafi's death.

According to the NOC, the spat over training involved about 60 Libyan university students, who were left without funds halfway through their academic year.

The group made up around a third of the total number of Libyan oil sector hopefuls who are being trained as part of an agreement with several oil majors, including BP.

State-controlled Gazprom, the world's largest gas producer, declined to comment.

The company lists Libya as one of its top priority investments outside Russia.

It has exploration rights for blocks 19 and 64, and following an asset swap with Germany's BASF in December 2007, it acquired 49 percent of oil concessions C96 and C97, which were pumping 120,000 bpd before the war and have reserves of 660 million barrels of oil.

Gazprom also has a deal with Italy's ENI to buy a stake in the giant Elephant field.

Libyan officials have promised to probe all Gadhafi-era deals. Some have said that countries that failed to back the NATO bombing campaign, including Russia, China and Germany, or that had been slow to denounce Gadhafi, such as Italy, could lose out.

BLACKLISTED

The NOC chairman expressed confidence the issue with Gazprom could be resolved, adding that Canada's Suncor, which had a similar deal, had already agreed to compensate for breaching its contract during the war.

Sources within the NOC said, however, that the behavior of firms during the uprising would be remembered.

"This is a black spot on these companies' names," said a NOC source who asked not to be named.

Last week Libya's interim oil and finance minister reiterated earlier promises made by the country's leader, Abdel Jalil, that allies could expect preferential treatment in return for their help.

"We will give preference to countries and friends that helped us," Ali Tarhouni told reporters.

Industry sources have long anticipated an investigation of oil deals by Libya's new rulers, which may lead to a reallocation of some contracts to reward countries that supported the uprising against Gadhafi.

Foreign players accounted for almost half a million barrels per day of oil output in Libya and imported 1.3 million bpd of crude before the war.