DUBAI/SINGAPORE  - Abu Dhabi National Oil Co (ADNOC) awarded Chinese state oil company Zhenhua Oil a 4 percent stake in its onshore oil concession, previously held by debt-laden CEFC China Energy Co. Ltd, it said in a statement on Sunday.

Zhenhua Oil is 100 percent indirectly owned by the Assets Supervision and Administration Commission of the State Council, a Chinese government agency that supervises and manages over a hundred state-owned assets and enterprises in a variety of sectors, including oil and petrochemicals and transport, it said.

CEFC in February 2017 bought a 4 percent stake in giant onshore oilfields majority-owned by ADNOC for $900 million. But the company ran into financial problems following the arrest of its chairman Ye Jianming in early 2018.

CEFC's creditors, led by China Development Bank, have over the past year been conducting sales of the conglomerate's global assets, including stakes in oil and gas fields in Abu Dhabi and Chad, and properties in Europe and Shanghai.

As part of the new stake transfer, Zhenhua Oil took over CEFC's existing term contracts in 2018 and 2019 and operations for Murban crude oil on Nov. 29, two people with knowledge of the matter said. They declined to be named as they are not authorised to speak to the media.

CEFC had lifted on average four cargoes, or a total 2 million of Murban crude, each month, one of the people said.

CEFC sold its Murban supplies in 2018 to Royal Dutch Shell, Total  and Vitol and has already inked new contracts for 2019 supplies. It was not immediately clear who are the buyers in 2019.

A Zhenhua spokesman did not immediately respond to request for comment. Reuters was not able to reach CEFC's media office in Shanghai by phone calls.

(Reporting by Stanley Carvalho in DUBAI, Chen Aizhu and Florence Tan in SINGAPORE Editing by Keith Weir and Kenneth Maxwell) ((asma.alsharif@thomsonreuters.com; +20225783290; Reuters Messaging: asma.alsharif.reuters.com@reuters.net))