Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

Analysis of Fractures in the Asmari Reservoir of Marun Oil Field (Zagros)

Document Type : Original Research Paper

Authors
Mehran Arian 1
R. Mohammadian 2
1 Department of Geology, science and research branch, Islamic Azad university
2 Geology office of National Iranian Oil Company, Ahwaz, Iran
10.22071/gsj.2010.54608
Abstract
Marun oil field is situated on the eastern part of Dezful Embayment zone (Zagros).Aghajari Formation is cropping out on the surface. Asmari formation, Bangestan and Khami Groups are the Main reservoirs in this field. Asmari formation with six reservoirs layers is the most important reservoir. Dolomitic carbonates are dominant lithology in the 1,2,3layers and so, fracture density is high, especially in the first layer(90% Dolomite).Increasing of shale and Marle Layers in the 4,5,6 layers caused to decreasing of brittle property and fracture density is low. According to this research, Marun Anticline is a fault (thrust) related fold with faulted Detachment Fold mechanism. Two major fractures system in the Marun oil field could be recognized which are regional fractures (with east-west trending) and local fractures (fold and bending related fractures). The main fractured sectors, Marun Anticline are being seen in the southern limb and the eastern part of northern limb by curvature investigation (by Differential and Graphical methods).The results of Isopermeability, RFT, PI maps are consistable with the results of fracture study in order to identification of fractured sectors in the Marun Anticline
Keywords
Asmari Formation
Marun Oil Field
fracture
Permeability
Detachment Fold
Structural Bending
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Scientific Quarterly Journal of Geosciences
Volume 20, Issue 78
Autumn 2011
Pages 87-96