In the Black Sea favourable to gas hydrate formation PT – conditions are started from depths of 700-750 m for pure methane and 300-350 m for natural gas. In accordance with the results of seismic studies in deposited thickness of the Black Sea the specific anomalies of the BSR and VAMP’s types are revealed that associate with the foot of gas hydrate deposits (GHD). Two gas hydrates types are distinguished: type I – diagenetic, type II – thermogenic.

　　Type I. Gas hydrate occurrence and buildup take place mainly in Quaternary sediments thickness of which in the depression is 1-3 km. By approximate data up to 107 m³/year of methane is generated in abyssal sediments. This methane may be thought of as the main component of gas hydrates in the Black Sea. Different types of the acoustic anomalies of gassy sediments have been detected at the abyssal zone by the marine acoustic complex (MAK-1M) and the Simrad EM-12 S120 multibeam echosounder. The “boiling” mud (underwater swamp) was detected in the abyssal zone at sea depths of 2200 m. Most of the BSR type anomalies are concentrated in the Tuapse trough, the Shatsky and Andrusov ramparts, the Anapa projection and the cones of paleorivers.

　　Type II. Katagenic gas, entering from the main of oil-gas-formation zone is the source for the formation of the II type. Seismic anomalies of VAMP’S type timed to fracture zone and mud volcanoes are indication of the II type hydrate. In the near-bottom layer in the Black Sea many gas hydrate occurrences timed to mud volcanoes are detected. Mud volcanoes are found in the West Black Sea Basin, Sorokin trough, in the Turkey (Giresun depression). Methane content is changed from 93.3 to 95.7 vol. %, and its homologue - from 4.3 to 6.7 vol. %.

　　The Black Sea gas resources in the hydrated phase are assessed of 20-25 billion m3. That is why it is necessary to study gas hydrates more systematically as in ranges of the National and in the International programs.