MOSCOW, Sept 16 (Reuters) - Average oil and gas

condensate output at Kazakhstan's Karachaganak oilfield dropped

around 30% on Sept 9-15 from the previous week to 175,610

barrels per day (bpd) due to planned maintenance, three industry

sources said on Monday.

The field operator, Karachaganak Petroleum Operating (KPO),

did not immediately reply to a request for comment.

In August, output at the field averaged around 240,000 bpd,

or 945,000 metric tons in total. According to the sources, the

plan for September stands at 936 million tons.

KPO is a joint venture between Eni SpA ( E ) (29.25%),

Shell plc ( SHEL ) (29.25%), Chevron ( CVX ) (18%), Lukoil

(13.5%) and KazMunayGas (10%).