AFFECT OF DIAGENESIS ON RESERVOIR QUALITY OF DARIYANFORMATION IN SOUTH PARS FIELD

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RAHMANI M.R.; MOUSSAVI HARAMI S.R.; ARIAN M.

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Journal: GEOSCIENCES Year:2016 | Volume:25 | Issue:100 Page(s): 165-178

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Title

AFFECT OF DIAGENESIS ON RESERVOIR QUALITY OF DARIYANFORMATION IN SOUTH PARS FIELD

Author(s)

RAHMANI M.R. | MOUSSAVI HARAMI S.R. | ARIAN M. | Issue Writer Certificate

Keywords

DARIYAN FORMATIONQ2

SOUTH PARS FIELDQ2

DIAGENESISQ2

RESERVOIR QUALITYQ2

OIL FIELDQ2

Abstract

DARIYAN FORMATION is one of the oil reservoirs in the SOUTH PARS FIELD. This formation has been studied in wells SPO-1, SPO -2 and Spo-3. Thickness of DARIYAN FORMATION in mentioned wells are 109, 113 and 114 meters respectively. Based on the studies of thin sections from the DARIYAN FORMATION of three above mentioned wells, nine carbonate and one detrital facies have been identified within four facies associations including tidal flat (Mudstone), lagoon (Bioclast mudstone to wackstone, Bioclastpeloidwackstone to packstone, Bioclast peloidpackstone to grainstone, Algal boundstone), Mid ramp (Echinoid mollusk wackstone to packstone, Orbitolinawackstone to packstone, Framestone, Floatstone) and outer ramp (Shale). Facies studies indicate that DARIYAN FORMATION has been deposited in a homoclinalramp. The DARIYAN FORMATION has been affected by four diagenetic stages, including marine, meteoric, burial and uplift. Themost important identified diagenetic processes are micritization, bioturbation, geopetal, physical and chemical compaction, cementation, neomorphism, replacement, dissolution, fracturing and filling. Among the all DIAGENESIS process, dissolution and fracturing are the major processes improving RESERVOIR QUALITY. In Contrary, physical compaction and especially cementation are the main processes reducing RESERVOIR QUALITY. Dissolution process with generating secondary porosity consists of vuggy and moldic, has important effect on increasing of porosity. Most of the dissolution features have been produced during the meteoric DIAGENESIS and less through burial DIAGENESIS. Dissolution process with develop the vuggy pores caused to connect them in some case and also affected on fractures, stylolites and previous diagenetic cements in upper and lower members of Daryian formation whicheventually has been increased permeability and RESERVOIR QUALITY. Also, Fracturing, the main other diagenetic process with connect the some individual vuggy and moldic pores together has effective role to increase the permeability and RESERVOIR QUALITY in upper and lower parts of DARIYAN FORMATION.

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APA: Copy

RAHMANI, M.R., MOUSSAVI HARAMI, S.R., & ARIAN, M.. (2016). AFFECT OF DIAGENESIS ON RESERVOIR QUALITY OF DARIYANFORMATION IN SOUTH PARS FIELD. GEOSCIENCES, 25(100), 165-178. SID. https://sid.ir/paper/31699/en

Vancouver: Copy

RAHMANI M.R., MOUSSAVI HARAMI S.R., ARIAN M.. AFFECT OF DIAGENESIS ON RESERVOIR QUALITY OF DARIYANFORMATION IN SOUTH PARS FIELD. GEOSCIENCES[Internet]. 2016;25(100):165-178. Available from: https://sid.ir/paper/31699/en

IEEE: Copy

M.R. RAHMANI, S.R. MOUSSAVI HARAMI, and M. ARIAN, “AFFECT OF DIAGENESIS ON RESERVOIR QUALITY OF DARIYANFORMATION IN SOUTH PARS FIELD,” GEOSCIENCES, vol. 25, no. 100, pp. 165–178, 2016, [Online]. Available: https://sid.ir/paper/31699/en

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