TITLE:
Petrophysical Evaluation and the Effect of Shale Layers on Net Pay Zone Thickness in the Marun Oil Field, Iran
AUTHORS:
Saeed Tajali, Mehran Arian
KEYWORDS:
Asmari Formation, Marun Oil Field, Petrophysical Evaluation, Well Logging
JOURNAL NAME:
Open Journal of Geology,
Vol.6 No.8,
August
17,
2016
ABSTRACT: The Marun oil field is situated on the eastern part of Zagros, Iran.
Aghajari Formation is cropping out on the
surface. The Asmari formation, the Bangestan and Khami Groups are the Main reservoirs
in this field and Asmari formation is the most important reservoir. Dolomitic
carbonates are dominant lithology in the
study well. Increasing of shale Layers in different layers caused to decrease of brittle property and this condition had investigated by petrophysical evaluation. According to this research, near to 29
percent shale has mixed with sandstone rock units in the study well which is comparable with maximum porosity
there. Because, sandstone layers have shown the best porosity (near to 26
percent) in the study well. Also, good rocks based on water saturation and porosity are situated in sandstone units
and poor rocks have existed in the limestone-dolomites. Therefore,
facies changes in the Asmari formation can explain the observed variations in
reservoir quality in the study area.