Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

The evaluation of effective parameters in fractures distribution of Asmari reservoir in Haft kel oil field (Southwest Iran)

Document Type : Original Research Paper

Authors
A. Solgi 1
A. R. Farrokhnia 2
F. Zahmati 3
1 Assistant Professor, Departement of Geology, Science and Research Branch, Islamic Azad University, Tehran, Iran
2 Assistant Professor, Departement of Geology, Karaj Branch, Islamic Azad University, Karaj, Iran
3 M.Sc. Student, Departement of Geology, Science and Research Branch, Islamic Azad University, Tehran, Iran
10.22071/gsj.2017.46772
Abstract
The Haft kel anticline is one of the oil fields located in Dezful embayment of the Zagros folded zone. In this study, the most important factors influencing the fracture distribution and hydrocarbon entrapments of Asmari formation were considered, and to investigate the fractures, subsurface data and analytical methods were used. These methods include inscribed circle, curvature analysis of the axial zone and changes in thickness of overburden sediments. Results of the inscribed circles and thickness maps of the overburden sediments show that the greatest concentration and development of fractures is in the hinge zone and in the eastern part of the anticline. In addition, the highest density of fractures is found to be in the outer arcs of the axial curvature sand decreases with depth. Evidences show that the most important factors controlling the fracture distribution are the geometry and the folding mechanism(flexural-slip).
Keywords
Fractures
Inscribed circles
axial curvature
Overburden sediments
Asmari Reservoir
Haft kel oil field
References
Abdollahie Fard, I., Sherkati, S. and Letouzey, J., 2006- Neogene salt in southwest Iran and its interaction with Zagros folding, American Association of Petroleum Geologists Geo 2006 Middle East Conference and Exhibition, Bahrain.
Bourne, S. J., Bauckmann, F., Rijkels, L., Stephenson, B. J., Weber, A. and Willemse, E. J. M., 2000- Predective modelling of naturally fractured reservoirs using geomechanism and flow simulation.9th Abu Dhabi Intern Petroleom Exhibition and Conference (Abu Dhabi, UAE) 10 PP.
Colman-Sadd, S., 1978- Fold development in Zagros simply folded belt, Southwest Iran." American Association of Petroleum 62: 984–1003.
Eshghi, M., 1969- Photo linears, Asmari Fracture System and well productivity of Aghajari Area, IOOC, Rep. No.1152.
Lisle, R. J., 1994- Detection of zones of abnormal strains in structures using Gaussian curvature analysis." American Association of Petroleum Geologists Bulletin 78: 1811-1819.
McCord, D. R., 1975- Asmari reservoir, Khuzestan province Iran, Fracture study of Asmari reservoir, OSCO
Mitra, S., 2002- Structural models of faulted detachment folds. AAPG Bulletin, 86, 671–693.
Nelson, R. A., 2001- Geologic analysis of naturally fractured reservoirs, Gulf publishing, Houston, Texas, 2nd ed., 332P.
Sangree, J. B., 1963- Correlation of joint spacing and type Asmari limestone Iran, LOE & PC report no., 753 PP. (Un pub.).
Sherkati, S. and Letouzey, J., 2004- Variation of structural style and basin evolution in the central Zagros (Izeh zone and Dezful Embayment), Iran. Marine and Petroleum Geology, 21, 535-554.
Stearns, D. W. and Friedman, M., 1972- Reservoirs in Fractured Rocks, Am., Assoc., Pet., Geol., Bull., 16, 82-106
Scientific Quarterly Journal of Geosciences
Volume 26, Issue 103 - Serial Number 103
Vol.26, No 103, spring 2017
Spring 2017
Pages 129-134