Hydrocarbons exploration in east Siberia southern basins

Conference · Thu Aug 01 00:00:00 EDT 1991 · Geobyte; (United States)

OSTI ID:5894192

Resnick, V S ^[1]

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1. Petroconsultants Inc., Houston, TX (United States)

The vast Lena-Tunguska province in the heart of Siberia is among the world's largest and least explored frontier basins. Some encouraging exploration has nevertheless been carried out in the four southern subbasins: PrePatom (PreBaykal) trough, Nepa-Botuobin anticlise, PreSayan-Yenisey basin, and Angara-Lena terrace. Source rocks are essentially Proterozoic, but younger sediments may contribute about 10% of the region's oil potential. Riphean-Cambrian subsalt reservoirs contribute more than 90% of the hydrocarbons discovered, whereas Cambrian salt provides the most common regional seals. The main hydrocarbon later migration occurred in Vendian-Cambrian. Traps include clastic wedging out along favorable structures and carbonate reef-like buildups. Many traps were transformed or destroyed by the late Paleozoic-early Mesozoic volcanic activity, whereas Hercynian overthrust tectonics developed new traps in the PrePatom trough. About 30 discoveries, mainly gas and condensates, have been made in the area, but operations are hampered by poor logistics and limited infrastructure.

• OSTI ID: 5894192
• Report Number(s): CONF-910978--
• Journal Information: Geobyte; (United States), Journal Name: Geobyte; (United States) Vol. 75:8; ISSN 0885-6362; ISSN GEOBE
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
ASIA
DEVELOPED COUNTRIES
EUROPE
EXPLORATION
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
GEOLOGIC TRAPS
GEOLOGY
MINERAL RESOURCES
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
PETROLEUM GEOLOGY
PRECAMBRIAN ERA
RESERVOIR ROCK
RESOURCES
SEDIMENTARY BASINS
SIBERIA
SOURCE ROCKS
TECTONICS
USSR