UPDATE 1-Libya's oilfields producing Es Sider, Amna and Sirtica shut
* Output of main grade Es Sider halted completely
* Operations at major terminals still down due to strike
* Zueitina port and El Feel oilfield still shut from other protests
By Julia Payne
LONDON, Aug 7 (Reuters) - Output of Libya's main crude oil grade, Es Sider, has been completely shut down since Tuesday, along with the fields producing Amna and Sirtica, following strikes at the Es Sider and Ras Lanuf terminals, Libyan and trading sources said.
The outage is one of the worst disruptions the OPEC member has seen in the last year, with exports down to about 425,000 barrels per day (bpd) from previous levels of more than 1 million bpd.
"The whole of Es Sider fields have stopped producing," a senior Libyan industry source said on Wednesday, adding Sirtica and Amna output was also completely down. Es Sider is Libya's main export grade.
Another source said the fields were shut down because they had reached maximum storage capacity as exports had been halted for more than a week.
The country's main terminals of Es Sider and Ras Lanuf have been down since end July due to protests by armed guards, who normally secure the installations, over pay and other issues. Continued...