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), Vol. 40:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
03 NATURAL GAS
NATURAL GAS DEPOSITS
HYDRODYNAMICS
PETROLEUM DEPOSITS
ARABIAN SEA
CRETACEOUS PERIOD
DOLOMITE
EXPLORATION
GEOLOGIC MODELS
GEOLOGIC TRAPS
INTERSTITIAL WATER
LIMESTONE
MATHEMATICAL MODELS
OFFSHORE SITES
QATAR
RESERVOIR FLUIDS
RESERVOIR ROCK
SANDSTONES
STRATIGRAPHY
ALKALINE EARTH METAL COMPOUNDS
ASIA
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATE ROCKS
CARBONATES
FLUID MECHANICS
FLUIDS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGY
GROUND WATER
HYDROGEN COMPOUNDS
INDIAN OCEAN
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MECHANICS
MESOZOIC ERA
MIDDLE EAST
MINERAL RESOURCES
MINERALS
OXYGEN COMPOUNDS
RESOURCES
ROCKS
SEAS
SEDIMENTARY ROCKS
SURFACE WATERS
WATER
020200* - Petroleum- Reserves
Geology
& Exploration
030200 - Natural Gas- Reserves
Geology
& Exploration