Nov 22 (Reuters) - DANA GAS DANA.AD :* ANNOUNCES A BUYBACK OF APPROX. $14 MILLION OF 4% NILE DELTA SUKUK LTD CERTIFICATES- REG S OF THE ISSUER IN NOVEMBER 2018* SAYS THESE BOUGHT BACK SUKUK WILL BE DELIVERED TO BANK OF NEW YORK MELLON ("PRINCIPAL PAYING AGENT") IN DUE COURSE FOR EFFECTING CANCELLATION* SAYS POST CANCELLATION, THE TOTAL OUTSTANDING OF THE 4% NILE DELTA SUKUK LTD CERTIFICATES WOULD