نویسندگان
1 استاد دانشگاه تبریز
2 دانشگاه آزاد اسلامی واحد تبریز
3 گروه زمینشناسی، دانشکده علوم پایه، واحد تبریز ، دانشگاه آزاد اسلامی، تبریز، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Arab Formation is the most important oil reservoir at Salman Field of Persian Gulf. Arab Formation is known as the upper part of Late Jurassic-aged Sourmeh Formation. This formation is 12.2 m thick in the studied well, consisting evaporative and carbonate units. In order to study the microfacies, sedimentary environment and presenting a sedimentary model, it has been studied 65 thin sections by polarizing microscope and identified 11 microfacies. On the basis of the analysis of identified microfacies, it has been proposed the homoclinal ramp sedimentary model in which, Arab Formation has deposited in the shallow part and above the FWWB surface in the internal ramp, in the pretidal, lagoon, shoal and restricted marine environments. The pretidal flat has been specified by fenestral mudstone, stromatolite boundstone and anhydrite microfacies, the lagoon and restricted marine by bioclast mudstone, bioclast wackstone and bioclast wackstone-packstone, and finally the shoal by bioclast intraclast grainstone, intraclast grainstone, intraclast ooid grainstone, ooid grainstone and bioclast packstone-wackstone. The effective diagenetic processes on Arab Formation in the studied well comprise bioturbation, micritization, cementation, dissolution, compaction, neomorphism and dolomitization. The cementation is observed as isopach rim cement, equant calcitic cement and anhydritic cement and also dissolution and dolomitization are the most important factors of increasing in the reservoir quality of Arab Formation. Intergranular, intragranular, moldic and vuggy porosities are the most important type of porosity, and intergranular porosity has a wide spread. The dominant grainstone facies of the shoal environment show higher high reservoir quality.
کلیدواژهها [English]
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