The Italian sector of the Adriatic Sea extends from the Gulf of Trieste in the north to the Otranto channel in the far southeast, with water depths generally less than 200 m especially in the northern part. It is a long-established hydrocarbon province and in the past has been a successful exploration area with numerous large biogenic gas fields discovered in the shallow Pliocene and Tertiary section. Many of these fields—such as Ravenna, Porto Corsini and Porto Garibaldi in the northern Adriatic (Zone B) offshore Po Valley region—were put into production decades ago and have been steadily supplying Italy with a large portion of her domestic gas requirements.

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