AN INVESTIGATION OF THE PROPERTIES OF DOLOMICRITES IN THE UPPER DALAN UNITS IN A FIELD IN THE PERSIAN GULF

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PARHAM S.; KAMALI M.R.

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Journal: GEOSCIENCES Year:2015 | Volume:24 | Issue:95 (STRATIGRAPHY & SEDIMENTOLOGY) Page(s): 175-184

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Title

AN INVESTIGATION OF THE PROPERTIES OF DOLOMICRITES IN THE UPPER DALAN UNITS IN A FIELD IN THE PERSIAN GULF

Author(s)

PARHAM S. | KAMALI M.R. | Issue Writer Certificate

Keywords

DOLOMICRITEQ2

FORMATION TEMPERATUREQ2

CARBONE AND OXYGEN ISOTOPESQ2

RESERVOIR CHARACTERIZATION FOR PERSIAN VERSION SEE PAGES 175 TO 184Q2

Abstract

The Dalan upper member is a gas reservoir in the Persian Gulf, which is important because of gas and condensates production. This unit has been affected by dolomitization. DOLOMICRITEs is a type of dolomites identified in the studied interval. This investigation concentrates on DOLOMICRITEs from the point of view of its spatial distribution and reservoir zonation. This type of dolomite has been studied using thin section, RCAL, and isotopic analysis data. This type of dolomite is identified relying upon petrographical evidences such as very fine to fine unimodal, anhedral to subhedral crystals of dolomite. The texture is equivalent to xenotopic-A and nonplanar-A. Some features like fenestral fabrics, microbial filaments evaporitic cast, anhydrite nodules and mud cracks are also identified. The findings led us to the conclusion that DOLOMICRITEs pertains to fenestral dolomitic mudstone, which deposited in supratidal to arid upper intertidal. The result of isotopic analysis of oxygen revealed that this dolomite formed at temperature between 20.36oC to 46.6oC. This confirms deposition in sabkha environment so sabkha dolomitization model offered for DOLOMICRITEs. The diagenetic processes affected dolomudstones are dissolution, cementation, compaction, anhydrite replacement and fracturing. Studies of the porosity and permeability data indicated that reservoir characterization is under the influence of texture. In mud-dominated facies like dolomitic mudstone, reservoir quality is poor to fair unless this part influenced by subsequent diagenetic processes like dissolution and fracturing.

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APA: Copy

PARHAM, S., & KAMALI, M.R.. (2015). AN INVESTIGATION OF THE PROPERTIES OF DOLOMICRITES IN THE UPPER DALAN UNITS IN A FIELD IN THE PERSIAN GULF. GEOSCIENCES, 24(95 (STRATIGRAPHY & SEDIMENTOLOGY)), 175-184. SID. https://sid.ir/paper/356471/en

Vancouver: Copy

PARHAM S., KAMALI M.R.. AN INVESTIGATION OF THE PROPERTIES OF DOLOMICRITES IN THE UPPER DALAN UNITS IN A FIELD IN THE PERSIAN GULF. GEOSCIENCES[Internet]. 2015;24(95 (STRATIGRAPHY & SEDIMENTOLOGY)):175-184. Available from: https://sid.ir/paper/356471/en

IEEE: Copy

S. PARHAM, and M.R. KAMALI, “AN INVESTIGATION OF THE PROPERTIES OF DOLOMICRITES IN THE UPPER DALAN UNITS IN A FIELD IN THE PERSIAN GULF,” GEOSCIENCES, vol. 24, no. 95 (STRATIGRAPHY & SEDIMENTOLOGY), pp. 175–184, 2015, [Online]. Available: https://sid.ir/paper/356471/en

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