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  2. Vol 2, No 3 (2021)
  3. Abbasi

Investigation of Petrographic and Diagenetic Properties of Asmari Reservoir Cap Rock, SW Iran

Samira Abbasi, Saeid Pourmorad, Ashutosh Mohanty

Abstract


Many problems in the production and development of oil fields lie in the correct and accurate assessment of the reservoir cap rock. Ramshir oil field is located 130 km southeast of Ahvaz and is one of the most important oil fields in the southwest of the country. To evaluate the petrographic and diagenetic properties, 300 thin microscopic sections were studied. According to petrographic studies, it was found that the cap rock in Ramshir oil field is composed of more evaporative sediments (mainly anhydrite with some gypsum) with some non-evaporative sediments (marl, carbonate, and bituminous shale). The most important diagenetic processes in the study area were considered to be dolomitization, cementation, compaction, anhydrite, recrystallization, and substitution. Petrographic and diagenetic studies suggest a swamp-swamp environment for this environment. Lithological changes are a sign of hot, humid, hot and dry weather during sedimentation of the cap rock of this field.

 

Doi: 10.28991/HEF-2021-02-03-06

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Keywords


Petrographic Study; Diagenetic Study; Cap Rock; Ramshir.

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DOI: 10.28991/HEF-2021-02-03-06

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