Adds information on facilities' condition, updates death toll

By Tibisay Romero and Mircely Guanipa

MORON, Venezuela, June 25 (Reuters) - Venezuela's Moron Petrochemical Complex, the country's second largest in operation, was restarting after a brief shutdown while the small El Palito refinery remained partially out of service on Thursday following quakes that caused infrastructure damages and power outages, authorities and sources said.

The quakes, which killed more than 180 people and injured over 1,500, left Venezuela's vast oil and gas infrastructure mostly untouched, according to preliminary reports from workers. But assessments are expected to continue this week as repairs are done, they added.

Carlos Miquileno, head of firefighters for Moron and Urama, said output at the Moron complex was restarting, and added that a key state-operated power plant in the central region, Planta Centro, was expected to restore supply starting on Thursday.

Moron's restart was confirmed by local mayor Emily Riera. Some storage infrastructure at the Pequiven-operated complex collapsed, but many operational plants could go back to service after assessments, according to a source and videos posted on social media.

A leak from a storage tank there had been detected on Wednesday. It was not immediately clear if it was repaired.

At the nearby 146,000-barrel-per-day El Palito refinery, operated by state firm PDVSA, damage to power lines left the facility mostly without electricity, forcing the shutdown of operational plants including its fluid catalytic cracker, three sources said.

Moron and El Palito are close to the quakes' epicenter in Yaracuy state, as well as some domestic fuel terminals and storage facilities. But PDVSA's remaining output and refining operations are mostly concentrated in the Orinoco Belt and in Western Venezuela, where no large damage has been reported.

Pequiven and PDVSA have not provided information about the status of their operations. Venezuela's oil ministry did not reply to a request for comment.

In Moron, one of the most affected cities, authorities are updating the death toll and sending injured people to hospitals, nurses and doctors said. Extensive road damage has prevented movement of vehicles in many areas, even for essential transportation, according to a Reuters witness.

As widespread power outages hit many regions in the country, oil executives from foreign firms operating with state-run PDVSA in joint ventures have noted that crude output levels could be hit by the lack of electricity in some oilfields.

Venezuela was producing some 1.2 million bpd of crude before the quakes.

Many energy companies with operations or offices in the country have been accounting for staff as they conduct initial assessments on the condition of oilfields, plants and refineries, but only a few of the cities with official reports of severe damages include critical oil infrastructure.

U.S.' Chevron CVX.N, Italy's Eni ENI.MI, Spain's Repsol REP.MC and UK's Shell SHEL.L said all personnel had been accounted for.

Chevron said the company "remains operational," while Eni and Repsol said the quake had not impacted their operations. The Perla project by Eni and Repsol, which is responsible for 50% of the gas feed demanded by the country's thermoelectrical plants, was not affected and gas output there remains uninterrupted, a Repsol spokesperson said.