R. Alipoor
Abstract
The Kupal oil anticline is one of the most important structures in Dezful embayment that is located in northeast of the Ahvaz city and north of the Marun oil field. Recent deposits and Lahbari member of the Aghajari formation have formed the surface outcrops, and the Asmari formation with 7 reservoir ...
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The Kupal oil anticline is one of the most important structures in Dezful embayment that is located in northeast of the Ahvaz city and north of the Marun oil field. Recent deposits and Lahbari member of the Aghajari formation have formed the surface outcrops, and the Asmari formation with 7 reservoir layers is the main reservoir rock in this oil field. In this research fractures of the Asmari formation in this anticline have been analyzed based on well data, subsurface maps and seismic profiles. The Kupal oil anticline is a fault-related (detachment fold) and asymmetric fold, in which the middle parts have been distinguished as potential zones of of dense fractures development due to longitudinal curvature. The southwest limb in much parts and northeast limb in middle parts indicate zones with high fracture density, and the axial bending of the Kupal anticline is a result of movement of deep faults.
F Baratpour; M Arian; A S
Abstract
Situated 15 km NW of the Izeh city, Tukak and Kamarun anticlines are located in northwest of the Izeh zone in the Zagros fold-and-thrust belt. The Tukak anticline measures about 17 km length by 3.3 km width on the Asmari formation outcrop, while the Kamarun anticline shows a maximum length and width ...
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Situated 15 km NW of the Izeh city, Tukak and Kamarun anticlines are located in northwest of the Izeh zone in the Zagros fold-and-thrust belt. The Tukak anticline measures about 17 km length by 3.3 km width on the Asmari formation outcrop, while the Kamarun anticline shows a maximum length and width of about 15 km and 3.5 km, respectively, on the same formation. The SE termination of the Kamarun anticline and the NW termination of the Tukak anticline form together an en-echelon array. Both anticlines represent nearly symmetrical box-fold geometry, in which the Pabdeh formation is the oldest outcrop in each anticlinal core and the Asmari formation constitutes most of their surface outcrop. Based on surface geology, 4 cross-sections across the Tukak anticline and 3 cross-sections across the Kamarun anticline (D-D' is a common section crossing the en-echelon plunges), and one longitudinal section through both structures were constructed. Since the Bangestan horizon is taken to indicate a position upper than sea level, the cross-sections were used to construct the UGC map on the Upper Khami horizon. In Tukak anticline, which is bigger than the Kamarun anticline, the UGC map of the Upper Khami horizon illustrates vertical and horizontal closures of 250 m and about 4.3 km2, respectively.
