Private equity (PE) firms, armed with $1 trillion worth of financial firepower, are casting their eye over the oil gas industry a new report claims.

A survey by advisory firm EY of 100 PE firms active in the sector found that 25% are planning acquisitions before the end of the year and 43% by the first half of 2017.

"Access to financing is arguably the biggest challenge facing oil and gas companies," said Andy Brogan, EY Global oil & gas transactions leader.

"While