Roc, which has a 37.5% interest in Cliff Head, said the unspecified problem has now been identified and production is expected to resume sometime next week.

The company recently said gross oil production at Cliff Head has generally ranged between 11,000 barrels of oil per day (bopd) and 12,500bopd, with a high of 15,800bopd.

The range is a result of intermittent downstream constraints, most recently relating to trucking capacity, which are currently being addressed, it said.

Cliff Head partners and their associated equities are Roc, AWE Oil (27.5%), Wandoo Petroleum, a Mitsui subsidiary (24%), Arc Energy (6%) and CIECO Exploration and Production (5%).