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The Role of Effective Thickness of the Asmari Formation Zones on Oil Production
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نویسنده
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Orangii Behzad ,Riahi Mohammad Ali
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منبع
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Iranian Journal Of Oil And Gas Science And Technology - 2021 - دوره : 10 - شماره : 2 - صفحه:107 -119
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چکیده
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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.
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کلیدواژه
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Asmari Formation ,Reservoir Zones ,Effective Thickness ,Oil Production
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آدرس
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Islamic Azad University, Science And Research Branch, Department Of Chemistry And Oil Engineering, Iran, University Of Tehran, Institute Of Geophysics, Iran
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پست الکترونیکی
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mariahi@ut.ac.ir
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Authors
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