PETROCELTIC, the oil and gas firm that acquired Edinburgh-based Melrose Resources in 2012, has recorded a big increase in losses after suffering drilling setbacks in places such as the Kurdistan region of Iraq, but said it is making good progress.

The Dublin-based firm made a pre-tax loss of $48.5 million (£30m) in the six months to June, compared with $5m in the preceding year.

The increase in losses came after Petroceltic wrote off $64m in respect of unsuccessful wells in Kurdistan, Romania and Egypt. It wrote off $21.8m exploration costs in the first half of 2013.

Some $50.7m of the latest write offs relate to the Shakrok licence in Kurdistan, where a recent well found only uncommercial amounts of gas rather than more valuable oil.

Last month the company suspended operations in Kurdistan and evacuated non-essential personnel amid the turmoil in the country.

Yesterday, Petroceltic said it hopes to resume operations on the Dinata licence in early October if circumstances allow.

Petroceltic wrote off $8.1m in respect of a dry well off Romania and $3.3m for one on the West Dikirnis lease in Egypt.

Petroceltic increased its exposure to both countries through the £165m takeover of Melrose. It retained the company's operations in Edinburgh.

Chief executive Brian O'Cathain, said: "Petroceltic's production and development business has delivered a solid performance to date in 2014."

He said the recent farm out of a stake in the Ain Tsila field in Algeria and signing of a gas sales agreement were important milestones towards unlocking a world class asset.

Mr O'Cathain said first half production performed "significamtly" ahead of expectations at approximately 25,200 barrels oil equivalent per day. Full year guidance has been revised upwards to 21,000-23,000 boepd from 20,000 to 22,000.

In June Petroceltic agreed a peace deal with a Swiss hedge fund, Worldview Capital Management, which had opposed a $100m share placing it completed.

Melrose's former chief executive David Thomas lost his seat on Petrolectic's board but remained chief operating officer.

Robert Adair, founder of Melrose, is Petroceltic's chairman.