Petroleum geology of Sakhalin Island, USSR

Conference · Fri Jun 01 00:00:00 EDT 1990 · AAPG Bulletin (American Association of Petroleum Geologists); (USA)

OSTI ID:6369131

Silverman, M R ^[1]

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1. Gustavson Associates, Inc., Boulder, CO (USA)

Sakhalin is a long, narrow island approximately the size of Hokkaido, consisting of two coastal mountain ranges and a central valley. It is located 10-300 km (6-190 mi) east of the Soviet mainland in the Sea of Okhotsk. The island is cored by Cretaceous and older rocks that comprise a fold belt characteristic of plate collision and accretion tectonics. Cenozoic deformation has produced numerous asymmetric compressional anticlines, many of which produce oil and gas. Reservoirs are primarily Miocene and Pliocene fluvial and deltaic sandstones, related to the paleo-Amur river. Oil is also being produced from fractured diatomites similar to California's Monterey formation. Most fields have numerous stacked pay zones. Source rocks and seals are deltaic and marine shales. Production is limited to several troughs of folded Tertiary sediments; the most important basins in terms of hydrocarbon production and potential are the North Sakhalin basin, the Pogranich graben, the Terpeniya basin, and the Aniva gulf. Significant production has been established in the North Sakhalin basin since the 1920s, but reserves in the other basins are minor. Sakhalin has produced 400 to 600 MMBO and 0.5 to 1.2 tcfg from over 60 fields, most of which are onshore. As the Soviet Union's only secure source of petroleum in the Far East, Sakhalin's reserves have a strategic importance far exceeding their market value. Current oil production rate is 17-18 MMBO/year. A gas pipeline connecting Sakhalin with the Soviet mainland was completed in 1987 and is expected to boost gas output to 100 bcfg/year by 1990. The largest fields are located on Sakhalin's NE coast and include Okha (200 MMBO, onshore) and recently discovered Chayvo (240 MMBO and 4.2 tcfg, offshore). Sakhalin's greatest hydrocarbon potential lies offshore, where exploration is less mature.

• OSTI ID: 6369131
• Report Number(s): CONF-900702-; CODEN: AABUD
• Journal Information: AAPG Bulletin (American Association of Petroleum Geologists); (USA), Vol. 74:6; Conference: 5. Circum-Pacific energy and mineral resources conference, Honolulu, HI (USA), 29 Jul - 3 Aug 1990; ISSN 0149-1423
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
USSR
PETROLEUM GEOLOGY
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
RESERVOIR ROCK
RESOURCE POTENTIAL
SANDSTONES
SEDIMENTARY BASINS
TERTIARY PERIOD
ASIA
CENOZOIC ERA
EASTERN EUROPE
EUROPE
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
GEOLOGY
MINERAL RESOURCES
RESOURCES
ROCKS
SEDIMENTARY ROCKS
020200* - Petroleum- Reserves
Geology
& Exploration
030200 - Natural Gas- Reserves
Geology
& Exploration