Условия образования отложений сиговской свиты в Большехетском нефтегазоносном районе

Abstract

The lithological and facial features of the Upper Jurassic deposits of the Sigovskaya suite (J3sg) in one of the fields of the Bolshekhetskoye oil and gas region of the West Siberian oil and gas province are considered. The complex structure of the suite was established, 4 packs (С-I, С-II, С-III, С-IV) were highlighted from bottom to top. The genetic relationship of the C-I member with the coastal-marine facies was revealed; C-II - with facies of waves of a shallow shelf; C-III - with relatively deepwater facies of the outer shelf; C-IV - with coastal marine facies.