A depositional model in the Arabian Intrashelf basin: The Upper Jurassic Hanifa reservoir of Abqaiq field, Saudi Arabia

Conference · Fri Mar 01 00:00:00 EST 1991 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:6008408

Bailey, D L ^[1]

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1. Saudi Aramco, Dhahran (Saudi Arabia)

Abqaiq field is a northeast-trending anticline approximately 60 km long and 12 km wide and contains several reservoirs. The 100 m thick Hanifa Reservoir interval consists of interlayered peloidal packstone and wackestone with subordinate dolomite and anhydrite. During an Upper Jurassic relative sea level lowstand, paleotopography within the Arabian Intrashelf basin localized fine-grained packstone into isolated mounds over the Abqaiq South Dome area, while muddier facies were being deposited over the North Nose. The Abqaiq Hanifa carbonate mound was zoned using sequence stratigraphy as a conceptual framework to ensure that chronostratigraphic relationships were honored, and that the subsequent computer model would therefore accurately reflect spatial porosity continuity within the reservoir. The Hanifa Reservoir was subdivided into five widely correlative zones that approximate separate parasequences, each beginning with tight mudstone-wackestone and grading upward into porous wackestone-packstone. Sequence stratigraphy interpretations are based on regional wireline log correlations combined with core descriptions and show the Abqaiq Hanifa to be time equivalent to only the upper few meters of the Hanifa Reservoir in fields to the north. In addition to reservoir modeling utility, these two general intrashelf basin settings have potential for stratigraphic traps. Wherever reservoir-quality rock can be found, proximity to the Hanifa/Hadriya source rocks-the source for much of Saudi Arabia's vast reserves-makes the Hanifa a favorable exploration target.

• OSTI ID: 6008408
• Report Number(s): CONF-910403-; CODEN: AABUD
• Journal Information: AAPG Bulletin (American Association of Petroleum Geologists); (United States), Vol. 75:3; Conference: Annual meeting of the American Association of Petroleum Geologists (AAPG), Dallas, TX (United States), 7-10 Apr 1991; ISSN 0149-1423
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
PETROLEUM DEPOSITS
GEOLOGY
STRATIGRAPHY
RESERVOIR ROCK
LITHOLOGY
SAUDI ARABIA
ANTICLINES
CARBONATE ROCKS
DEPOSITION
GEOLOGIC HISTORY
GEOLOGIC MODELS
JURASSIC PERIOD
SEDIMENTARY BASINS
SOURCE ROCKS
ASIA
DEVELOPING COUNTRIES
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
MESOZOIC ERA
MIDDLE EAST
MINERAL RESOURCES
RESOURCES
ROCKS
SEDIMENTARY ROCKS
020200* - Petroleum- Reserves
Geology
& Exploration