Total initial onshore hydrocarbon resources of the Kamchatka region: updating the quantitative estimate

Analysis of geological structure of oil and gas promising territories in the Kamchatka Region carried out over two recent decades taking into account the results of exploratory regional and prospecting geological works for oil and gas demonstrated that commercial gas-bearing capacity of the region is limited to the thin Upper Oligocene - Lower Miocene stratigraphic interval of the section in one West Kamchatka structural element only - the Kolpakovsky Trough. The authors evaluated quality of 69 objects prepared to deep drilling, and found that the results of drilling in 32 objects are negative. The authors’ changes to the boundaries of geopetroleum zoning, which reflect reduction of oil and gas promising areas are proposed. Quantitative assessment of total initial onshore hydrocarbon resources of the Kamchatka Region is carried out. Taking into account exploration maturity and four known small gas condensate fields, the geological analogue method was applied to Oligocene-Lower Miocene oil and gas bearing sequences for West Kamchatka with two reference sites defined; for promising Eocene play - the expert method; and for East Kamchatka - the volume-statistical method with subsequent probability estimate. According to the results of quantitative assessment of total initial hydrocarbon resources in the Kamchatka Region as on 01.01.2022, they amount to 499.8 mln tons of hydrocarbon equivalent (HC in place)