Pumping at Libya’s El Sharara oil field resumed on March 5, an oil engineer and Libyan oil source said, a day after output had been halted after a landowner closed a valve on a pipeline crossing his land.

No production data was immediately available, though the engineer said that output could recover to 300,000 barrels per day (bbl/d) as soon as March 6.

The field, located deep in Libya’s south, had been producing about 308,000 bbl/d until the shutdown and has capacity of about 340,000 bbl/d.

Libya’s National Oil Corp. (NOC) operates Sharara in partnership with Repsol, Total (NYSE: TOT), OMV and Statoil (NYSE: STO).

The valve that had been closed near the west Libyan town of Zintan was reopened before any formal declaration of force majeure on loadings of Sharara crude, one oil source said.

Sharara reopened after a long blockade in late 2016, but has suffered a number of stoppages since then because of localized protests by guards and other groups amid the wider turmoil that has gripped Libya since the toppling of Muammar Gaddafi in 2011.

Repeated and lengthy shutdowns cause pressure in the oilfield’s wells to drop, reducing production capacity. Boosting capacity at Sharara and other fields requires investment that NOC has been struggling to secure.

As conflict and falling oil revenues caused living standards to slide in Libya in recent years, local groups have tried to press demands by blockading oil facilities.

A week ago NOC declared force majeure on the 70,000 bbl/d El Feel after a protest by guards closed the field, which is operated by a joint venture between NOC and Italy’s Eni (NYSE: E).