Maturation history of Neogene-Quaternary sediments, Nile delta basin, Egypt
- Suez Canal Univ. (Egypt)
The present Nile delta area covers approximately 60,000 km{sup 2}. Fields in this area provide two-thirds of the gas production in Egypt. Geological knowledge of the Nile delta is still limited because of insufficient subsurface data. Gas is generated and accumulates at stratigraphic levels ranging from the lower Miocene to the lower Pliocene. The highest levels of organic maturation in the Neogene-Quaternary section are in the northern part of the onshore area, such as in the Abu Madi well, and in the eastern part of the offshore area, such as in the El Temsah well, where gas reservoirs occur in the lower Pliocene sandstones (Abu Madi Formation), and in the underlying Sidi Salem Formation and lower Miocene rocks. Here, the Sidi Salem Formation is probably generative, having an R{sub 0} of approximately 0.65%, LOM (levels of organic metamorphism) of 9.5 to 9.7, and TTI (time-temperature index) of 9.7 to 15.2. By contrast, a different thermal history clearly existed in the western and eastern parts of the onshore area, such as in the Monaga and Damanhur wells, where the organic maturities are significantly lower than maturities elsewhere in the basin (R{sub 0} = 0.38 and 0.29%, respectively). The predicted maturities obtained by using the LOM method seem to fit much closer to the observed maturities than the predicted maturities obtained by using the Lopatin TTI method. 5 figs.
- OSTI ID:
- 6988732
- Journal Information:
- AAPG Bulletin (American Association of Petroleum Geologists); (USA), Vol. 74:1; ISSN 0149-1423
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
EGYPTIAN ARAB REPUBLIC
NATURAL GAS DEPOSITS
SOURCE ROCKS
MATURATION
GEOLOGIC FORMATIONS
NATURAL GAS WELLS
QUATERNARY PERIOD
STRATIGRAPHY
TERTIARY PERIOD
AFRICA
CENOZOIC ERA
DEVELOPING COUNTRIES
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGY
MINERAL RESOURCES
RESOURCES
WELLS
030200* - Natural Gas- Reserves
Geology
& Exploration