Geological and geochemical model of formation of oil and gas accumulations in the South Caspian basin

Conference · Thu Aug 01 04:00:00 EDT 1991 · Geobyte; (United States)

OSTI ID:5848550

Narimanov, A A

The South Caspian Sea, Azerbaijan, has been a major petroleum producer since 1848 and is still one of the premier prospective areas for oil and gas in the Soviet Union. Many years of research studies suggest oil and gas in the Soviet Union. Many years of research studies suggest an area of increased prospectivity in the deeper part of the Caspian Sea. Geologic history recorded that a trough developed during the Mesozoic through the Tertiary. The sedimentary sequence is up to 23 km thick. The Pliocene sequence is the major proven productive and prospective interval. Multiple stages of active sedimentation and tectonism took place starting in the early Pliocene and ending in the late Pliocene. Traps were formed and destroyed during the early to late Pliocene. The final tectonic events during the late Pliocene trapped the remigrated oil. Gas and gas condensate probably are within the lower reaches of the basin. Because of the rapid deposition, mud volcanoes were also active. Many are still active today and can be noted in proximity to hydrocarbon deposits. Rapid subsidence and deposition, and anomalously low geothermal regime, and a low maturity of sampled organic matter from the Pliocene section leads to the hypothesis of hydrocarbon generation at depth from older sedimentary rocks. With this proposed geological and geochemical model, the prospectivity for oil and gas deposits is greatly enhanced in aerial extent and possibly to a depth of 9 km.

• OSTI ID: 5848550
• Report Number(s): CONF-910978--
• Conference Information: Journal Name: Geobyte; (United States) Journal Volume: 75:8
• 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
CASPIAN SEA
CENOZOIC ERA
DEVELOPED COUNTRIES
ENERGY SOURCES
EUROPE
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
GEOLOGIC MODELS
GEOLOGIC STRUCTURES
GEOLOGIC TRAPS
GEOLOGY
MINERAL RESOURCES
NATURAL GAS
NATURAL GAS DEPOSITS
ORIGIN
PETROLEUM
PETROLEUM DEPOSITS
PETROLEUM GEOLOGY
RESOURCES
SEAS
SEDIMENTARY BASINS
SURFACE WATERS
TECTONICS
TERTIARY PERIOD
USSR