Controls on the distribution of oil, gas, and gas-condensate pools in the Timan-Pechora basin

Conference · Wed Sep 01 04:00:00 EDT 1993 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:6965389

Bogatsky, V; Pankratov, J ^[1]

---

1. TPO-VNIGRI, Ukhta (Russian Federation)

The distribution of hydrocarbon pool in the Timan Pechora basin is controlled by various aspects of the geological structure and stratigraphy. Oil pools are confined to tectonically stable areas, and there are often stratigraphically trapped (Omra-Lizha saddle in the Izhma Pechora basin, Khoreyyer depression). Structures in more active tectonic areas (Pechora-Kolva aulacogen and Ukhta-Izhma swell) usually contain complex accumulations of oil, gas, and condensate. The mixed character of these pools proves their multistaged origin involving further gas charge during stages of increased subsidence in the kitchen areas and degassing of oil during later stages of uplift. However, active tectonics led not only to gas-cap development but also, in places, to complete loss of hydrocarbons at the surface. The Varandey Adzhva zone is an example, with its considerable volume of heavy and medium-heavy oils. In the Ural foredeep basins, older oil and gas accumulations at the outer edge and on transverse uplifts were enriched later by gas generated from deeply buried formation the axial part of the orogenic trough and its eastern border. Younger fold structures contain gas and gas-condensate pools charged by gas generated in both orogenic and preorogenic formations and by residual oils re-migrated from preorogenic accumulations that once existed in the pericratonic region.

• OSTI ID: 6965389
• Report Number(s): CONF-9310237--
• Conference Information: Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Journal Volume: 77:9
• 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
CONDENSATES
CONTROL
DEVELOPED COUNTRIES
DISTRIBUTION
EUROPE
FLUIDS
GAS CONDENSATES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
GEOLOGY
HYDROCARBONS
LIQUIDS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NATURAL GAS LIQUIDS
ORGANIC COMPOUNDS
ORIGIN
PETROLEUM DEPOSITS
RESOURCES
SEDIMENTARY BASINS
STRATIGRAPHY
TECTONICS
USSR