Amplitude Energy (ASX:AEL) said it is negotiating with O.G. Energy over the latter's potential participation in the three-well East Coal supply project program, in relation to O.G. Energy mulling an acquisition of Mitsui E&P Australia's interests in the Otway joint venture, including the Athena gas plant, according to a Tuesday Australian bourse filing.

Amplitude's negotiations are proceeding on the basis that O.G. Energy would fund its 50% share of past and future project expenditures.

The firm's shares rose over 2% in early trading on Tuesday.