Case history of the Khwaja Gogerdak and Yatim Tageh gas fields of northern Afghanistan
The Yatim Tagh and Khwaja Gogerdak structures are located 12 km and 17 km, respectively, to the east of Shibhargan. The structures are conspicuous surface anticlines with the Paleocene Bokhara Limestone exposed at the core, flanked by soft younger formations of clay and marl, of Eocene and Oligocene age. The Paleocene section consists dominantly of marls and clays which, with the Upper Cretaceous sediments, form an effective cap rock for reservoirs in the underlying Cretaceous section. The deeper reservoirs have high formation pressure, about 250 atm in the Hauterivian and more than 300 atm in the Jurassic section, but the shallow reservoirs in the Senonian section have pressures of only 37 to 40 atm. The reserves of gas in the Cretaceous section of the Khwaja Gogerdak gas field are estimated to be 48,470,300,000 cu m (1.711,001 MMcf), and in the Yatim Tagh field, 13,478,700,000 cu m (475,798 MMcf). Since 1963, however, due to an increase in the proved thickness and extent of reservoirs in the Hauterivian section, the total estimated reserve of the Cretaceous section is now increased to 63,000,000,000 cu m (2,400,000 MMcf).
- OSTI ID:
- 5171525
- Journal Information:
- United Nations Mineral Resources Develop. Ser.; (United States), Vol. 29
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AFGHANISTAN
NATURAL GAS DEPOSITS
GEOLOGIC HISTORY
RESOURCE ASSESSMENT
ANTICLINES
CLAYS
CRETACEOUS PERIOD
DEPTH
GEOLOGIC STRUCTURES
GEOPHYSICAL SURVEYS
JURASSIC PERIOD
LIMESTONE
MAPS
NATURAL GAS
RESERVOIR PRESSURE
RESERVOIR ROCK
SEDIMENTS
STRATIGRAPHY
TERTIARY PERIOD
THICKNESS
ASIA
CARBONATE ROCKS
CENOZOIC ERA
DEVELOPING COUNTRIES
DIMENSIONS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGY
MESOZOIC ERA
MINERAL RESOURCES
RESOURCES
ROCKS
SEDIMENTARY ROCKS
SURVEYS
030200* - Natural Gas- Reserves
Geology
& Exploration
030100 - Natural Gas- Reserves- (-1989)