MOSCOW, Oct 29 (Reuters) - Kazakhstan's energy company KazMunayGas said on Saturday that it expects the Bolashak onshore processing complex at the giant Kashagan offshore oilfield to resume operations in coming days after repair works at a complex unit.

"At the moment, all the mechanical repair work, aimed at the restoration of production levels, has been completed. The unit is expected to come onstream in several days," the company said following a visit by its head, Magzum Mirzagaliyev to Kashagan.

Production at Kashagan, one of the world's largest oilfields, sharply declined on Aug. 3 due to a gas release.

Kazakhstan's Energy Minister Bolat Akchulakov told Reuters earlier this month that Kashagan will resume production of 400,000 barrels per day (bpd) by the end of October after maintenance.

Kashagan is operated by the North Caspian Operating Company (NCOC), which includes TotalEnergies, Eni, Shell, Exxon Mobil, KazMunayGas, Inpex and China National Petroleum Corp. (Reporting by Vladimir Soldatkin, Editing by Louise Heavens)