Anatoly Obzhirov_ICGG 2017 - Engii
Anatoly Obzhirov
Anatoly Obzhirov
Russian Academy of Sciences,教授
标题: The Relationship Between Gas Hydrate and Oil-Gas Deposits
The next geological, geophysics and hydro-acoustics characteristics assist which help to explain to form methane bubbles fluxes and gas hydrate in the Okhotsk Sea. The methane fluxes are mostly located in the zones fault. It is very important that quantity and power of methane fluxes increase in period seismic activity of the Far Eastern Seas region. Methane is going from deep layers to up in surface sediment and water column via zone fault. Source of methane is oil-gas bearing layers. Thickness sediment with it in North-East Sakhalin slope is about 5-7 km and many hydrocarbon deposits were discovered in Eastern Sakhalin shelf in structures with sediment consist oil-gas-bearing layers that stretch in the slope. Since from 1988 to 2015 methane bubbles fluxes (flares) from sediment to water column increased every year and now they were found in the East Sakhalin slope and shelf of Okhotsk Sea more than 500. Methane concentration increased in 100-1000 times as well as in bottom, column and surface water and sediment in area with bubbles. Gas hydrate in surface sediment in Okhotsk Sea was found in the 17 areas. Source of methane is deep layers that contain oil-gas on hydrocarbon deposit. It is very important regularity of relationship between methane fluxes, gas hydrate and oil-gas deposit. Investigation of gas hydrate and other geological characteristic in the Okhotsk Sea was provided in frame international projects from 1998 year. These are Russian-Germany (KOMEX, 1998-2004), Russian-Japan-Korea (HAOS, 2003-2006 and SAKHALIN, 2007-2012 and 2013-2017). Thus, complex investigations with international cooperation allow us to discover methane fluxes, gas hydrate and to find much regularity to form and to destroy gas hydrate in the Okhotsk Sea. There is show that it is present relationship between methane fluxes, gas hydrate and oil-gas deposit.
Prof. Obzhirov Anatoly now is chief of research scientist of the laboratory of Gas Geochemistry of the V.I. Il’ichev Pacific Oceanological Institute Russian Academy of Sciences, Vladivostok, Russia. He was born in 1940, Uste-Katav, region of Ural, Russia. In 1963 he finished Tomsk Politekhnical Institute and got diploma of oil-gas engineer-geologist, Tomsk. He received diploma Kandidat of Sciences (PhD), 1974 in Moscow Geologiical Survey Institute, diploma Doctor of Sciences, 1996 in Moscow Institute Geoinformsystem and diploma Professor, 2009 in High Certificate Committee of Moscow, Russia. In 1977 he organizes gas geochemical school to study gas distribution in water and sediment of the World Sea and use of it like indicator to search oil-gas deposits, gas hydrate, mapping geological structure, zones faults, to examine seismic activity and global climate change. He developed complex of geological and geophysics methods to search oil-gas deposits and gas hydrate, organized and was at the chief about 35 international expeditions in the Far Eastern Seas to study gas distribution in the World Seas. In connection with more than 500 methane fluxes and 20 areas with gas hydrates were found in the Okhotsk Sea.