Hydrocarbon habitat in main producing areas, Saudi Arabia

Journal Article · Thu Dec 31 23:00:00 EST 1981 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:5520753

Ayres, M G ^[1]; Bilal, M; Jones, R W; Slentz, L W; Tartir, M; Wilson, A O

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1. Chevron Oil Field Research Co., La Habra, CA

Current hydrocarbon production in Saudi Arabia is from reservoirs of Cretaceous and Jurassic age. Geochemical studies of the sediments and oils suggest that the hydrocarbons were derived from two separate source-rock provinces. Oil production from the large fields in the southern part of the area is from Jurassic carbonate reservoirs. Most of these oils were derived from thermally mature, thinly laminated, organic-rich carbonate rocks of Jurassic age (Callovian-Oxfordian). These source rocks were deposited in an intrashelf basin which is limited to the southern part of the main producing areas. Extensive vertical migration of oils originating in these sediments is prevented by superjacent evaporite seals deposited during the Late Jurassic. Fields in the northern producing areas appear to have derived their hydrocarbons from a source-rock province on the north. Production from Cretaceous clastic and carbonate reservoirs is limited to the northeastern part of the producing areas. This distribution may be explained by limitation of thermally mature Cretaceous source rocks to the northeastern areas or by the local lack of subjacent evaporite seals to separate these reservoirs from Jurassic source rocks. Thermal maturation studies indicate that the hydrocarbons in Mesozoic reservoirs migrated into the present traps during the early Tertiary.

• OSTI ID: 5520753
• Journal Information: Am. Assoc. Pet. Geol., Bull.; (United States), Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Vol. 66:1; ISSN AAPGB
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
ASIA
CARBONATE ROCKS
CHEMISTRY
CRETACEOUS PERIOD
GEOCHEMISTRY
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
GEOLOGIC TRAPS
GEOLOGY
JURASSIC PERIOD
MESOZOIC ERA
MINERAL RESOURCES
ORIGIN
PETROLEUM DEPOSITS
PETROLEUM GEOLOGY
PRODUCTION
RESERVOIR ROCK
RESOURCES
ROCKS
SAUDI ARABIA
SEDIMENTARY ROCKS
SOURCE ROCKS