The gas producer, which is being acquired in a $70 billion (47.07 billion pounds) takeover deal by Shell , will give more prominence to earnings before interest, tax, depreciation and amortisation (EBITDA) and return on average capital employed (ROACE) as performance indicators, it said.

The changes will apply from May 8, when the firm reports first-quarter results.

"They also reflect the growing importance of Brazil and Australia on the Group's performance," BG said in a statement.

Within its upstream financial reporting segment, BG will start disclosing financial details about its liquefied natural gas (LNG) business, including its newly opened QCLNG facility in Australia.

(Reporting by Karolin Schaps; editing by Jason Neely)