MOSCOW, Nov 6 (Reuters) - Russia's Orenburg gas

processing plant has increased gas intake from the Karachaganak

field in Kazakhstan since the start of November in a gradual

recovery since it was hit by a drone attack last month, two

industry sources said on Thursday.

The strike on the Orenburg plant about 1,700 km (1,056

miles) east of Ukraine as part of Kyiv's campaign against

Russian energy infrastructure marked the first known disruption

to Western oil majors operating in Russia.

The incident led to reduced oil and gas condensate output at

Karachaganak, a major field developed by an international

consortium that includes U.S. major Chevron ( CVX ), Shell

and Eni, underlining the vulnerability of

cross-border energy assets to the continuing conflict.

The sources said that output at Karachaganak has been

increased from early November by about 15% to between 30,000 and

32,000 metric tons per day, from about 26,600 tons previously.

Planned production volumes stand at up to 35,500 tons per

day.

The Orenburg plant resumed operations at one of three

production lines on October 22, with a second line coming back

on November 1, the sources said, adding that the remaining line

will be restarted in mid-December.