Biofacies, depositional model, and sequence stratigraphy of the Asmari Formation, Interior Fars sub-zone, Zagros Basin, SW Iran

2017 ◽  
Vol 33 (3) ◽  
pp. 489-507 ◽  
Author(s):  
Reza Sadeghi ◽  
Hossein Vaziri-Moghaddam ◽  
Ebrahim Mohammadi
Keyword(s):  
Sequence Stratigraphy ◽  
Asmari Formation ◽  
Depositional Model ◽  
Zagros Basin ◽  
Sw Iran

scholarly journals Bio-Sequence Stratigraphy of Asmari Formation in the Southeast of Norabad (Zagros Basin, SW Iran)

2021 ◽  
Author(s):  
Mohammadsadegh Dehghanian
Keyword(s):  
Sea Level ◽  
Sequence Stratigraphy ◽  
Carbonate Platform ◽  
Reservoir Rock ◽  
Dispersion Pattern ◽  
Asmari Formation ◽  
Level Curve ◽  
Zagros Basin ◽  
Lithostratigraphic Units ◽  
Global Sea Level

Abstract Asmari Formation is the thick sequence of carbonate sediment in the range of Oligocene-Miocene which is deposited in the foreland basins of the Zagros and is considered as the original and most famous reservoir rock of Zagros basin. To study of lithostratigraphic units and sequence stratigraphy of this Formation, the section in the southeast of Norabad was selected. Field study indicated that Asmari Formation possessed the thickness of 401.5m and included 9 lithostratigraphic units. According to the study of microfacies, Stacking pattern and identification of main sequence level, three depositional sequences including two-second order and one-third order sequence were recognized. The sea-level curve in the studied section indicated that it was correspondence to the global sea level curve. These facies deposited in five environmental sedimentations as follow Open Sea Shelf (Fore Barrier), Bar, Lagoon, Back bar shelf, and Shoal. The environment is part of a carbonate platform that has been formed on an open shelf. In addition, according to the Study of foraminifer dispersion pattern the range of Asmari Formation in Norabad was suggested to be Oligocene (Rupelian- Chattian) to lower Miocene (Aquitanian- Burdigalian).

Biostratigraphy and Sequence Stratigraphy of the Gurpi Formation at Deh Dasht Area, Zagros Basin, SW Iran

2014 ◽  
Vol 88 (6) ◽  
pp. 1681-1695 ◽  
Author(s):  
Mahboobeh FEREYDOONPOUR ◽  
Hossein VAZIRI-MOGHADDAM ◽  
Azizollah TAHERI
Keyword(s):  
Sequence Stratigraphy ◽  
Zagros Basin ◽  
Sw Iran ◽  
Gurpi Formation

Sedimentary facies and sequence stratigraphy of the Asmari Formation at Chaman-Bolbol, Zagros Basin, Iran

2007 ◽  
Vol 29 (5-6) ◽  
pp. 947-959 ◽  
Author(s):  
Mahnaz Amirshahkarami ◽  
Hossein Vaziri-Moghaddam ◽  
Azizolah Taheri
Keyword(s):  
Sequence Stratigraphy ◽  
Sedimentary Facies ◽  
Asmari Formation ◽  
Zagros Basin

Biostratigraphy of the Asmari Formation at Khaviz and Bangestan Anticlines, Zagros Basin, SW Iran

2012 ◽  
Vol 263 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Ali Rahmani ◽  
Azizollah Taheri ◽  
Hossein Vaziri-Moghaddam ◽  
Ali Ghabeishavi
Keyword(s):  
Asmari Formation ◽  
Zagros Basin ◽  
Sw Iran

scholarly journals Reservoir heterogeneity and fracture parameter determination using electrical image logs and petrophysical data (a case study, carbonate Asmari Formation, Zagros Basin, SW Iran)

2019 ◽  
Vol 17 (1) ◽  
pp. 51-69 ◽  
Author(s):  
Ghasem Aghli ◽  
Reza Moussavi-Harami ◽  
Ruhangiz Mohammadian
Keyword(s):  
Parameter Determination ◽  
Fracture Aperture ◽  
Asmari Formation ◽  
Fracture Parameter ◽  
Fractured Reservoir ◽  
Zagros Basin ◽  
Permeability Index ◽  
Secondary Porosity ◽  
Fracture Parameters ◽  
Sw Iran

AbstractAssessment of reservoir and fracture parameters is necessary to optimize oil production, especially in heterogeneous reservoirs. Core and image logs are regarded as two of the best methods for this aim. However, due to core limitations, using image log is considered as the best method. This study aims to use electrical image logs in the carbonate Asmari Formation reservoir in Zagros Basin, SW Iran, in order to evaluate natural fractures, porosity system, permeability profile and heterogeneity index and accordingly compare the results with core and well data. The results indicated that the electrical image logs are reliable for evaluating fracture and reservoir parameters, when there is no core available for a well. Based on the results from formation micro-imager (FMI) and electrical micro-imager (EMI), Asmari was recognized as a completely fractured reservoir in studied field and the reservoir parameters are mainly controlled by fractures. Furthermore, core and image logs indicated that the secondary porosity varies from 0% to 10%. The permeability indicator indicates that zones 3 and 5 have higher permeability index. Image log permeability index shows a very reasonable permeability profile after scaling against core and modular dynamics tester mobility, mud loss and production index which vary between 1 and 1000 md. In addition, no relationship was observed between core porosity and permeability, while the permeability relied heavily on fracture aperture. Therefore, fracture aperture was considered as the most important parameter for the determination of permeability. Sudden changes were also observed at zones 1-1 and 5 in the permeability trend, due to the high fracture aperture. It can be concluded that the electrical image logs (FMI and EMI) are usable for evaluating both reservoir and fracture parameters in wells with no core data in the Zagros Basin, SW Iran.

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