%0 Journal Article %T The Role of Effective Thickness of the Asmari Formation Zones on Oil Production %J Iranian Journal of Oil and Gas Science and Technology %I Petroleum University of Technology %Z 2345-2412 %A Orangii, Behzad %A Riahi, Mohammad Ali %D 2021 %\ 04/01/2021 %V 10 %N 2 %P 107-119 %! The Role of Effective Thickness of the Asmari Formation Zones on Oil Production %K Asmari Formation %K Reservoir zones %K effective thickness %K oil production %R 10.22050/ijogst.2021.278551.1588 %X This paper investigates the role of the adequate thickness of the Asmari reservoir formation zones on oil production in one of the Iranian carbonate oil fields. Adequate thickness is a term that includes the total gross thickness of rocks by lithofacies for a selected wellbore. The lithology of the Asmari formation in the studied area consists of dolomite, sandstone, lime, dolomitic-lime, sandstone-shale, and shale limestone dolomites. Based on the existing well-logs, the average shale volume, the effective arithmetic means of porosity in the gross intervals, and average water saturation or hydrocarbon-bearing increments of the studied field are calculated using well-logs. In wellbore #A, a depth interval of 2214 to 2296 m shows 9.6% average shale volume, 27.2% average water saturation, and 20.9% average porosity. A depth interval of 2213 to 2280 m, in wellbore #B, shows 6% average shale volume, 21.25% average water saturation, and 28.5% average porosity. Based on our petrophysical assessments, we divide the Asmari reservoir in the studied field into eight zones. Zone 1 is made of carbonate (calcareous and dolomitic), and zones 2–5 are mainly sandstone; zones 7 and 8 are calcareous and shale, and zone 6 is a mixture of all the rocks mentioned above. Among these eight zones, there are two primary hydrocarbon productive zones. The numerical calculation of in situ oil volume showed that zone 2 contains 65% of oil volume in this reservoir. With more than 80% sand, this zone has the highest net hydrocarbon column. %U https://ijogst.put.ac.ir/article_133643_4d43f228da0581592e81535ccec6e3a5.pdf