(Reuters) - Kazakhstan is considering levying a fine of as much as $2 billion (1 billion pounds) on a gas project led by BG Group Plc (>> BG Group plc) and Eni SpA (>> Eni SpA) for failing to fulfil certain contractual obligations, Bloomberg reported.

The fine would be roughly in line with penalties the government threatened to impose in a 2010 dispute that ended with the state taking a 10 percent stake in the gas and condensate project, Bloomberg reported, citing sources.

Eni and BG each own 29.25 percent of the Karachaganak project in north-west Kazakhstan, which they jointly operate.

State-owned KazMunayGaz owns 10 percent of the project, while U.S. oil major Chevron Corp (>> Chevron Corporation) owns 18 percent and Russia's Lukoil (>> NK Lukoil PAO) 13.5 percent.

The penalty may be a precursor to the government increasing its stake in Karachaganak, Bloomberg reported.

BG, Eni and Lukoil were not immediately available for comment.

KazMunayGaz said questions should be addressed to the Energy Ministry, which also was not available for comment. Chevron referred queries to the project's operators, BG and Eni.

(Reporting by Mamidipudi Soumithri and Esha Vaish in Bengaluru; Editing by Savio D'Souza and Anil D'Silva)

Stocks treated in this article : Chevron Corporation, Eni SpA, BG Group plc, NK Lukoil PAO