Lithostratigraphy and depositional environments of the Upper Jurassic Arab-C carbonate and associated evaporites in the Abqaiq Field, eastern Saudi Arabia
- King Fahd Univ. of Petroleum and Minerals (Saudi Arabia)
Lithostratigraphy and depositional environment of the Arab-C carbonate in eastern Saudi Arabia were studied using cores and well logs from the Abqaiq oil field. A 275-m Upper Jurassic evaporite sequence occurs between the Sulaiy-Yamama (Thamama Group) and the Tuwaiq-Hanifa-Arab-D (Tuwaiq Group) carbonate sequences. Dolomite and limestone interbeds of 1-30 m in thickness within the evaporite sequence are continuous over long distances and have uniform thicknesses and log characteristics indicating an aggradational type of deposition. The lithologically heterogeneous Arab-C carbonate is the thickest interbed, reaching 26-30 m in thickness. Lithology types recognized in the Arab-C carbonate are (1) ooid bioclast grainstone, (2) oolite grainstone, (3) pellet grainstone, (4) pellet packstone, (5) skeletal wackestone, (6) mudstone, (7) anhydritic limestone, and (8) dolomite. The Arab-C carbonate has been divided into seven layers based on lithology and porosity variations. Four layers (1,3,5,7) are porous calcarenitic carbonates and the other three layers are nonporous.
- OSTI ID:
- 35517
- Journal Information:
- AAPG Bulletin, Journal Name: AAPG Bulletin Journal Issue: 3 Vol. 79; ISSN 0149-1423; ISSN AABUD2
- Country of Publication:
- United States
- Language:
- English
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