FACIES ANALYSIS, DEPOSITIONAL ENVIRONMENT AND EFFECTIVE DIAGENESIS PROCESSES ON RESERVOIR QUALITY OF THE ASMARI FORMATION IN RAMIN OILFIELD

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BAHRAMI F.; MOUSSAVI HARAMI S.R.; KHANEHBAD M.; MAHMUDI GHARAIE M.H.; SADEGHI R.

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Journal: APPLIED SEDIMENTOLOGY Year:2015 | Volume:2 | Issue:4 Page(s): 16-36

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Title

FACIES ANALYSIS, DEPOSITIONAL ENVIRONMENT AND EFFECTIVE DIAGENESIS PROCESSES ON RESERVOIR QUALITY OF THE ASMARI FORMATION IN RAMIN OILFIELD

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Keywords

FACIESQ2

DEPOSITIONAL ENVIRONMENTQ2

DIAGENESISQ2

RESERVOIR QUALITYQ2

ASMARI FORMATIONQ2

RAMIN OILFIELDQ2

Abstract

The purpose of this study was to interpret DEPOSITIONAL ENVIRONMENT and the most effective diagenetic processes on the RESERVOIR QUALITY of the ASMARI FORMATION in wells no.3 and 6 in the Ramin Oil Field in the north Dezful embayment. Petrographic examination of 230 thin sections led to identification of 12 sedimentary FACIES deposited in five sub-environments including tidal flat, lagoon, shoal, open marine and outer ramp, where sedimentation took place in a homoclinal carbonate ramp. In addition, petrographic studies show a wide range of diagenetic processes affected these rocks but three processes including cementation, dolomitization and dissolution are the most important processes affecting reservoir properties of the studied formation. Dissolution and dolomitization processes with a higher frequency than the cementation process are mostly have affected the mud supported and peloidal FACIES and led to enhancement of the effective porosity (more than 12%) and permeability (with a K more than 1 mD) as well as increased RESERVOIR QUALITY. On the other hand, cementation process led to a reduction of RESERVOIR QUALITY (with a PHIE less than 12 % Kless than 0.1 mD and SWE more than 0.6) in some parts of the succession (especially in well No.3).Generally, shallow and mostly mud-supported FACIES are more abundant than other FACIES (with a frequency about 60%) and more affected by dissolution and dolomitization processes that played an important role in the increasing of RESERVOIR QUALITY of studied carbonate in the ASMARI FORMATION in RAMIN OILFIELD.

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APA: Copy

BAHRAMI, F., MOUSSAVI HARAMI, S.R., KHANEHBAD, M., MAHMUDI GHARAIE, M.H., & SADEGHI, R.. (2015). FACIES ANALYSIS, DEPOSITIONAL ENVIRONMENT AND EFFECTIVE DIAGENESIS PROCESSES ON RESERVOIR QUALITY OF THE ASMARI FORMATION IN RAMIN OILFIELD. APPLIED SEDIMENTOLOGY, 2(4), 16-36. SID. https://sid.ir/paper/260622/en

Vancouver: Copy

BAHRAMI F., MOUSSAVI HARAMI S.R., KHANEHBAD M., MAHMUDI GHARAIE M.H., SADEGHI R.. FACIES ANALYSIS, DEPOSITIONAL ENVIRONMENT AND EFFECTIVE DIAGENESIS PROCESSES ON RESERVOIR QUALITY OF THE ASMARI FORMATION IN RAMIN OILFIELD. APPLIED SEDIMENTOLOGY[Internet]. 2015;2(4):16-36. Available from: https://sid.ir/paper/260622/en

IEEE: Copy

F. BAHRAMI, S.R. MOUSSAVI HARAMI, M. KHANEHBAD, M.H. MAHMUDI GHARAIE, and R. SADEGHI, “FACIES ANALYSIS, DEPOSITIONAL ENVIRONMENT AND EFFECTIVE DIAGENESIS PROCESSES ON RESERVOIR QUALITY OF THE ASMARI FORMATION IN RAMIN OILFIELD,” APPLIED SEDIMENTOLOGY, vol. 2, no. 4, pp. 16–36, 2015, [Online]. Available: https://sid.ir/paper/260622/en

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