Sept 11 (Reuters) - Abu Dhabi National Oil Company

(ADNOC) is expected to make a formal offer to acquire Covestro ( CVVTF )

for about 14.4 billion euros ($15.90 billion)

including debt, the Financial Times reported on Wednesday.

Having circled the German chemicals firm for more than a

year, ADNOC in June won the target company over to disclose more

data and have in-depth talks, based on an improved indicative

bid of 11.7 billion euros or 62 euros per share.

Covestro ( CVVTF ), which makes plastics and chemicals for

construction and engineering, said at the time it was opening

its books to ADNOC because an agreement on core aspects

including Covestro's ( CVVTF ) growth strategy may be reached.

A spokesperson for Covestro ( CVVTF ) said the company had read the FT

report with interest and did not comment further. ADNOC did not

immediately respond to an emailed request for comment.

($1 = 0.9059 euros)