Geology and assessment of undiscovered oil and gas resources of the Northern West Siberian Mesozoic Composite Total Petroleum System of the West Siberian Basin Province, Russia, 2008

Abstract

COVER Eocene strata along the north side of Van Keulenfjorden, Svalbard, include basin-floor fan, marine slope, and deltaic to fluvial depositional facies. The age and facies of these strata are similar to Tertiary strata beneath the continental shelves of Arctic Eurasia, thus providing an analog for evaluating elements of those petroleum systems. Relief from sea level to top of upper bluff is approximately 1,500 feet. Photograph by David Houseknecht.

Sequence Stratigraphy of the Jurassic Strata and Occurrences of Potential Sandstone Reservoirs in the ST Gas Field, Northern West Siberia Basin

“…2 of 15 [1,2]. Therefore, we focused on the Jurassic strata in the ST gas field in this study by conducting a comprehensive stratigraphic sequence analysis to build a sequence evolution model of Jurassic strata in order to facilitate future exploration.…”

“…ST is a giant gas field located in the north of the West Siberia Basin (Figure 1) [1,2]. Previous studies in this area often focus on post-Jurassic shallow marine to continental sandstone reservoirs which host most of the dry gas reserves.…”

“…Previous studies in this area often focus on post-Jurassic shallow marine to continental sandstone reservoirs which host most of the dry gas reserves. A lot has been done in terms of its tectonostratigraphic evolution [3,4], structural framework [5,6], stratigraphic sequence division and correlations [2,7], interpretation of the sedimentary facies and facies associations [8,9], as well as hydrocarbon accumulations [1,[10][11][12]. However, limited research has been conducted on the underlying Jurassic strata which are expected to host potential oil and wet gas, and may represent future exploration and exploitation targets [1,2].…”

“…A lot has been done in terms of its tectonostratigraphic evolution [3,4], structural framework [5,6], stratigraphic sequence division and correlations [2,7], interpretation of the sedimentary facies and facies associations [8,9], as well as hydrocarbon accumulations [1,[10][11][12]. However, limited research has been conducted on the underlying Jurassic strata which are expected to host potential oil and wet gas, and may represent future exploration and exploitation targets [1,2]. Therefore, we focused on the Jurassic strata in the ST gas field in this study by conducting a comprehensive stratigraphic sequence analysis to build a sequence evolution model of Jurassic strata in order to facilitate future exploration.…”

Assessment of undiscovered conventional oil and gas resources of the West Siberian Basin Province, Russia, 2020

“…The geologic models for the three AUs share several characteristics, including overall tectonic history and stratigraphic evolution since Triassic time (Vyssotski and others, 2006;Schenk, 2018;Shemin and others, 2019). The geologic model for the Southern West Siberian Basin Reservoirs AU is for oil and minor gas generated from Mesozoic source rocks (mainly from the Bazhenov Formation) to have migrated vertically and updip into (1) sandstones within structural traps associated with paleotopography on complexly structured and rifted basement, (2) sandstones within stratigraphic traps in rifts, (3) sandstones deposited in Neocomian marine clinoforms, (4) sandstones in basin-floor fans, and (5) sandstones infilling incised valleys.…”