Any move to boost gas production in Victoria by drilling onshore threatens to undermine Australia's commitment to cut its greenhouse gas emissions, energy experts warn.

Political pressure is growing for Victoria to cut short its moratorium on onshore gas exploration, after Opposition Leader Matthew Guy joined Prime Minister Malcolm Turnbull in blaming the ban for soaring power prices.

The state Coalition promised on Monday to open up Victorian farmland to gas extraction before the end of the decade, reversing a ban it brought in more than three years ago in order to allay community fears about fracking.

One Melbourne-based gas drilling company is already eyeing off reserves in Gippsland and the Otways, should the Matthew Guy-led opposition take power and lift the ban.