Genel said 2017 production is expected to fall to 35,000-43,000 barrels per day (bpd), down from 53,300 bpd in 2016, the bottom end of its target.
The company, which will publish full-year results on March 30, also said it expected to book a "material impairment" on its Miran and Bina Bawi gas fields, for which it is continuing to seek an investment partner.
(Reporting by Karolin Schaps; editing by Jason Neely)