Hydrodynamic trapping in the Cretaceous Nahr Umr lower sand of the North Area, Offshore Qatar
A hydrodynamic model is described to account for oil and gas occurrences in the Cretaceous of offshore Qatar, in the Arabian Gulf. Variable and inconsistent fluid levels and variable formation water potentials and salinities cannot be explained by combinations of stratigraphic and structural trapping. Indeed, there is no structural closure to the southwest of the oil and gas accumulations. The water-potential and salinity data and oil distribution are consistent with this model and indicate that a vigorous hydrodynamic system pervades the Cretaceous of the Arabian Gulf region. Extensive upward cross-formational discharge is taking place in the North Area. This cross-formation water flow could be partly responsible for localized leaching and reservoir enhancement in the chalky limestones.
- Research Organization:
- Qatar General Petroleum Corp. (QA)
- OSTI ID:
- 6983450
- Journal Information:
- J. Pet. Technol.; (United States), Journal Name: J. Pet. Technol.; (United States) Vol. 40:3; ISSN JPTJA
- Country of Publication:
- United States
- Language:
- English
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ALKALINE EARTH METAL COMPOUNDS
ARABIAN SEA
ASIA
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATE ROCKS
CARBONATES
CRETACEOUS PERIOD
DOLOMITE
EXPLORATION
FLUID MECHANICS
FLUIDS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC MODELS
GEOLOGIC TRAPS
GEOLOGY
GROUND WATER
HYDRODYNAMICS
HYDROGEN COMPOUNDS
INDIAN OCEAN
INTERSTITIAL WATER
LIMESTONE
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MATHEMATICAL MODELS
MECHANICS
MESOZOIC ERA
MIDDLE EAST
MINERAL RESOURCES
MINERALS
NATURAL GAS DEPOSITS
OFFSHORE SITES
OXYGEN COMPOUNDS
PETROLEUM DEPOSITS
QATAR
RESERVOIR FLUIDS
RESERVOIR ROCK
RESOURCES
ROCKS
SANDSTONES
SEAS
SEDIMENTARY ROCKS
STRATIGRAPHY
SURFACE WATERS
WATER