摘要
The lithostratigraphy and biostratigraphy specifications of the Sarvak Formation are considered to study in wells No. 2, 16 and 66 of Rag-e-Safid oilfield. They are located at the southeast of Ahwaz (the southwest of Iran). The lithology of the Sarvak Formation in all the wells mostly consists of limestone. The depth of the Sarvak Formation in well No. 2 is 720 m;in this well, the Sarvak Formation overlies the Kazhdumi Formation and underlies the Papdeh Formation. Vertical distribution of recognized foraminifera, macrofossils and calcareous Algae identifies two biozones: 1) Favusellawashitensis Range zone;2) Praealveolinacretacea-Ovalveolina ovum & Rudistfragment Ass. zone. The thicknesses of the Sarvak Formation in wells No. 16 and 66 are about 100 m and 108 m, respectively;in a part of the Sarvak Formation, drilling was completed, while its upper boundary is covered with the Papdeh Formation, in both wells. In terms of biostratigraphy studies in wells No. 16 and 66, one assemblage biozone is recognized as Praealveolinacretacea-Ovalveolina ovum & Rudistfragment Ass. Zone, similarly. Finally, the age of the Sarvak Formation is determined as the Cenomanian in three considered wells.
The lithostratigraphy and biostratigraphy specifications of the Sarvak Formation are considered to study in wells No. 2, 16 and 66 of Rag-e-Safid oilfield. They are located at the southeast of Ahwaz (the southwest of Iran). The lithology of the Sarvak Formation in all the wells mostly consists of limestone. The depth of the Sarvak Formation in well No. 2 is 720 m;in this well, the Sarvak Formation overlies the Kazhdumi Formation and underlies the Papdeh Formation. Vertical distribution of recognized foraminifera, macrofossils and calcareous Algae identifies two biozones: 1) Favusellawashitensis Range zone;2) Praealveolinacretacea-Ovalveolina ovum & Rudistfragment Ass. zone. The thicknesses of the Sarvak Formation in wells No. 16 and 66 are about 100 m and 108 m, respectively;in a part of the Sarvak Formation, drilling was completed, while its upper boundary is covered with the Papdeh Formation, in both wells. In terms of biostratigraphy studies in wells No. 16 and 66, one assemblage biozone is recognized as Praealveolinacretacea-Ovalveolina ovum & Rudistfragment Ass. Zone, similarly. Finally, the age of the Sarvak Formation is determined as the Cenomanian in three considered wells.
