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Title: Jurassic Bazhenov Unit in the Salym oil field, West Siberia - An excellent source rock and fractured shale reservoir

Abstract

The Upper Jurassic Bazhenov Unit covers approximately 1 million km{sup 2} of West Siberia and is an excellent source rock. This Unit has proved to be a prolific shale reservoir in 14 local highs with the Salym oil field the major discovery. More than 300 wells have been drilled to date in this area, covering approximately 5800 km{sup 2}. The Bazhenov formation is composed of calcerous, organic-rich mudstone and siliceous hale lithofacies. Producing capacities of individual wells range from a few barrels daily to a maximum of 1000 bbl/day, and occasionally reaching 10,000 bbl/day. On average the porosity is 6.1%. The rock matrix is virtually impermeable and oil flow occurs via various types of fractures. All production is water free. The initial formation pressure ranges from normal hydrostatic to abnormally high, reaching 4060 and 6525 psi, respectively, at 2800 m depth. The temperature ranges from 180 to 280{degree} at depths from 2750 to 2950 m. The oil density varies between 30 and 46{degree} API, and the sulfur content ranges from 0.08 to 0.48%. The range of CO{sub 2} content in the associated gas is between 0.2 and 11.5%. Material of marine origin was the precursor organic matter of the kerogenmore » for the Bazhenov Unit. The organic carbon content is high, ranging from 5 to 7% and occasionally reaching 15-20%. These are type II kerogens. The Bazhenov source rocks generate in situ high quality paraffin-base oils.« less

Authors:
; ; ;  [1]
  1. Institute of Geology and Exploration of Fossil Fuels (Russian Federation)
Publication Date:
OSTI Identifier:
7079360
Report Number(s):
CONF-910403-
Journal ID: ISSN 0149-1423; CODEN: AABUD
Resource Type:
Conference
Journal Name:
AAPG Bulletin (American Association of Petroleum Geologists); (United States)
Additional Journal Information:
Journal Volume: 75:3; Conference: Annual meeting of the American Association of Petroleum Geologists (AAPG), Dallas, TX (United States), 7-10 Apr 1991; Journal ID: ISSN 0149-1423
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; PETROLEUM; MATURATION; PETROLEUM DEPOSITS; GEOCHEMISTRY; PETROLEUM GEOLOGY; SOURCE ROCKS; SIBERIA; API GRAVITY; FRACTURED RESERVOIRS; GEOLOGIC FORMATIONS; JURASSIC PERIOD; RESERVOIR PRESSURE; RESERVOIR ROCK; SHALES; ASIA; CHEMISTRY; DENSITY; DEVELOPED COUNTRIES; ENERGY SOURCES; EUROPE; FOSSIL FUELS; FUELS; GEOLOGIC AGES; GEOLOGIC DEPOSITS; GEOLOGY; MESOZOIC ERA; MINERAL RESOURCES; PHYSICAL PROPERTIES; RESOURCES; ROCKS; SEDIMENTARY ROCKS; USSR; 020200* - Petroleum- Reserves, Geology, & Exploration; 023000 - Petroleum- Properties & Composition

Citation Formats

Petzoukha, Y, Rovenskaya, A, Zonn, M, and Kononkov, A. Jurassic Bazhenov Unit in the Salym oil field, West Siberia - An excellent source rock and fractured shale reservoir. United States: N. p., 1991. Web.
Petzoukha, Y, Rovenskaya, A, Zonn, M, & Kononkov, A. Jurassic Bazhenov Unit in the Salym oil field, West Siberia - An excellent source rock and fractured shale reservoir. United States.
Petzoukha, Y, Rovenskaya, A, Zonn, M, and Kononkov, A. Fri . "Jurassic Bazhenov Unit in the Salym oil field, West Siberia - An excellent source rock and fractured shale reservoir". United States.
@article{osti_7079360,
title = {Jurassic Bazhenov Unit in the Salym oil field, West Siberia - An excellent source rock and fractured shale reservoir},
author = {Petzoukha, Y and Rovenskaya, A and Zonn, M and Kononkov, A},
abstractNote = {The Upper Jurassic Bazhenov Unit covers approximately 1 million km{sup 2} of West Siberia and is an excellent source rock. This Unit has proved to be a prolific shale reservoir in 14 local highs with the Salym oil field the major discovery. More than 300 wells have been drilled to date in this area, covering approximately 5800 km{sup 2}. The Bazhenov formation is composed of calcerous, organic-rich mudstone and siliceous hale lithofacies. Producing capacities of individual wells range from a few barrels daily to a maximum of 1000 bbl/day, and occasionally reaching 10,000 bbl/day. On average the porosity is 6.1%. The rock matrix is virtually impermeable and oil flow occurs via various types of fractures. All production is water free. The initial formation pressure ranges from normal hydrostatic to abnormally high, reaching 4060 and 6525 psi, respectively, at 2800 m depth. The temperature ranges from 180 to 280{degree} at depths from 2750 to 2950 m. The oil density varies between 30 and 46{degree} API, and the sulfur content ranges from 0.08 to 0.48%. The range of CO{sub 2} content in the associated gas is between 0.2 and 11.5%. Material of marine origin was the precursor organic matter of the kerogen for the Bazhenov Unit. The organic carbon content is high, ranging from 5 to 7% and occasionally reaching 15-20%. These are type II kerogens. The Bazhenov source rocks generate in situ high quality paraffin-base oils.},
doi = {},
journal = {AAPG Bulletin (American Association of Petroleum Geologists); (United States)},
issn = {0149-1423},
number = ,
volume = 75:3,
place = {United States},
year = {1991},
month = {3}
}

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