EVALUATION OF CLAY CCONTENT OF SHURIJEH RESERVOIR FORMATION USING CORE ANALYSIS IN GONBADLI GAS FIELD, EASTERN KOPET-DAGH BASIN

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JOZANIKOHAN G.; SAHABI F.; NOROUZI G.H.; MEMARIAN H.

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Paper Information

Journal: GEOSCIENCES Year:2015 | Volume:24 | Issue:95 (ENGINEERING & ENVIRONMENTAL GEOLOGY) Page(s): 239-252

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Title

EVALUATION OF CLAY CCONTENT OF SHURIJEH RESERVOIR FORMATION USING CORE ANALYSIS IN GONBADLI GAS FIELD, EASTERN KOPET-DAGH BASIN

Author(s)

JOZANIKOHAN G. | SAHABI F. | NOROUZI G.H. | MEMARIAN H. | Issue Writer Certificate

Keywords

CLAY MINERALSQ2

X-RAY DIFFRACTION (XRD)Q2

X-RAY FLUORESCENCE (XRF)Q2

THERMAL ANALYSIS (DTA-TGA)Q2

SCANNING ELECTRON MICROSCOPY (SEM)Q2

CATION EXCHANGE CAPACITY (CEC)Q2

SHURIJEH FORMATIONQ2

GONBADLY FIELDQ2

Abstract

CLAY MINERALS reduce the reservoir quality in different ways. They may cause mechanical problems in drilling and lead to petrophysical misinterpretations.Therefore, Clay typing is necessary for upstream petroleum exploration and production industry. In this paper, type, amount and distribution patterns of different CLAY MINERALS in 76 core samples from two wells one of witch is producing and the other is non - producing in the SHURIJEH FORMATION, aging early Cretaceous, were identified by six different instrumental analytical methods such as X-Ray diffraction (XRD), X- Ray fluorescence, thin section studies, thermal analysis (DTA-TGA), scanning electron microscopy (SEM) and measuring the cation exchange capacity (CEC). The results proved that the dominant CLAY MINERALS are illite, magnesium rich chlorite and kaolinite. The minor clays are glauconite (in the both wells), montmorillonite (in producing well) and mixed layers of illite-montmorillonite and chlorite-montmorillonite types. The average amount of each CLAY MINERALS in nonproducing well is more than producing one. Then CLAY MINERALS were classified on the percentage basis into five classes (less than 10%, 10-15%, 15-20%, 20-25% and more than 25%). According to quantity of samples in each class, the producing and non-producing wells were recognized as clean and shaly sand respectively. An increase in glauconite and Illite amounts and also an increase in illite and chlorite layers of mixed-layered clays with increasing burial depth and temperature is an obvious sign of burial diagenesis in this formation. The best correlation was observed between percentages of CLAY MINERALS and iron, aluminum, potassium and magnesium.The CLAY MINERALS in the SHURIJEH FORMATION are diagenetic alteration of rock fragments, plagioclase and alkali feldspar in origin and in some cases they originate from outside with layered distribution. Distribution pattern of the autogenic clays are pore filling, pore coating and pore bridging, which cause the porosity and permeability reduction in this formation.

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APA: Copy

JOZANIKOHAN, G., SAHABI, F., NOROUZI, G.H., & MEMARIAN, H.. (2015). EVALUATION OF CLAY CCONTENT OF SHURIJEH RESERVOIR FORMATION USING CORE ANALYSIS IN GONBADLI GAS FIELD, EASTERN KOPET-DAGH BASIN. GEOSCIENCES, 24(95 (ENGINEERING & ENVIRONMENTAL GEOLOGY)), 239-252. SID. https://sid.ir/paper/356470/en

Vancouver: Copy

JOZANIKOHAN G., SAHABI F., NOROUZI G.H., MEMARIAN H.. EVALUATION OF CLAY CCONTENT OF SHURIJEH RESERVOIR FORMATION USING CORE ANALYSIS IN GONBADLI GAS FIELD, EASTERN KOPET-DAGH BASIN. GEOSCIENCES[Internet]. 2015;24(95 (ENGINEERING & ENVIRONMENTAL GEOLOGY)):239-252. Available from: https://sid.ir/paper/356470/en

IEEE: Copy

G. JOZANIKOHAN, F. SAHABI, G.H. NOROUZI, and H. MEMARIAN, “EVALUATION OF CLAY CCONTENT OF SHURIJEH RESERVOIR FORMATION USING CORE ANALYSIS IN GONBADLI GAS FIELD, EASTERN KOPET-DAGH BASIN,” GEOSCIENCES, vol. 24, no. 95 (ENGINEERING & ENVIRONMENTAL GEOLOGY), pp. 239–252, 2015, [Online]. Available: https://sid.ir/paper/356470/en

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