ABSTRACT
The North Sakhalin Basin Province of eastern Russia contains one Total Petroleum System (TPS) – North Sakhalin Neogene – with more than 6 BBOE known, ultimately recoverable petroleum (61% gas, 36% oil, 3% condensate). Tertiary rocks in the basin were deposited by the prograding paleo-Amur River system. Marine to continental, Middle to Upper Miocene shale to coaly shale source rocks charged marine to continental Middle Miocene to Pliocene sandstone reservoir rocks in Late Miocene to Pliocene time. Fractured, self-sourced, Upper Oligocene to Lower Miocene siliceous shales also produce hydrocarbons. Geologic history is that of a Mesozoic Asian passive continental margin that was transformed into an active accretionary Tertiary margin and Cenozoic fold belt by the collision of India with Eurasia and by the subduction of Pacific Ocean crustal plates under the Asian continent. The area is characterized by extensional, compressional and wrench structural features that comprise most known traps.

INTRODUCTION
The North Sakhalin Basin Province was an active Tertiary margin and Cenozoic fold belt characterized by repeated wrench movements and both compressional and extensional structural features. It contains one major TPS called North Sakhalin Neogene, with Neogene shale and siliceous-shale source rocks and Neogene sandstone and fractured siliceous-shale reservoir rocks.

References listed in this report include a limited selection of those most recent and most pertinent to this document. Not all are specifically cited in the text. Russian translations are referenced according to the translation date, and many such maps and illustrations are lacking in needed detail, explanation or location. The literature commonly contains multiple spellings for names and features within Russian provinces. The stratigraphic equivalents chart is composited from multiple references to approximately equate the range of stratigraphic nomenclature in use. It is not intended to be precise with respect to absolute geologic age.