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Diagenetic Processes and Reservoir Heterogeneity in Salt-Encased Microbial Carbonate Reservoirs (Late Neoproterozoic, Oman)
المؤلفون المشاركون
Becker, Stephan
Reuning, Lars
Amthor, Joachim E.
Kukla, Peter A.
المصدر
العدد
المجلد 2019، العدد 2019 (31 ديسمبر/كانون الأول 2019)، ص ص. 1-19، 19ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2019-11-04
دولة النشر
مصر
عدد الصفحات
19
التخصصات الرئيسية
الملخص EN
A common problem in dolomite reservoirs is the heterogeneous distribution of porosity-reducing diagenetic phases.
The intrasalt carbonates of the Ediacaran-Early Cambrian Ara Group in the South Oman Salt Basin represent a self-sourcing petroleum system.
Depositional facies and carbonate/evaporite platform architecture are well understood, but original reservoir properties have been modified by diagenesis.
Some of the carbonate reservoirs failed to produce hydrocarbons at acceptable rates, which triggered this study.
The extent of primary porosity reduction by diagenetic phases was quantified using point counting.
To visualize the distribution of diagenetic phases on a field scale, we constructed 2D interpolation diagenesis maps to identify patterns in cementation.
The relative timing of diagenetic events was constrained based on thin-section observations and stable isotope analyses.
Near-surface diagenesis is dominated by reflux-related processes, leading to porosity inversion in initial highly porous facies and a patchy distribution of early cements.
This strong diagenetic overprint of primary and early diagenetic porosity by reflux-related cements leads to a reduction of stratigraphic and facies control on porosity.
Calcite was identified as a burial-related cement phase that leads to an almost complete loss of intercrystalline porosity and permeability.
Bitumen is an important pore-occluding phase and time marker of the deep-burial realm.
The stratigraphic position of the dolomite reservoirs embedded at the base of a salt diapir had a strong impact on its diagenetic development.
The salt isolated the dolomites from external fluids, leading to a closed system diagenesis and the buildup of near lithostatic fluid pressures.
In combination, these processes decreased the impact of further burial diagenetic processes.
The study highlights that cement distribution in salt-encased carbonate reservoirs is mainly related to early diagenetic processes but can be very heterogeneous on a field scale.
Further work is needed to implement these heterogeneities in an integrated numerical reservoir model.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Becker, Stephan& Reuning, Lars& Amthor, Joachim E.& Kukla, Peter A.. 2019. Diagenetic Processes and Reservoir Heterogeneity in Salt-Encased Microbial Carbonate Reservoirs (Late Neoproterozoic, Oman). Geofluids،Vol. 2019, no. 2019, pp.1-19.
https://search.emarefa.net/detail/BIM-1153935
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Becker, Stephan…[et al.]. Diagenetic Processes and Reservoir Heterogeneity in Salt-Encased Microbial Carbonate Reservoirs (Late Neoproterozoic, Oman). Geofluids No. 2019 (2019), pp.1-19.
https://search.emarefa.net/detail/BIM-1153935
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Becker, Stephan& Reuning, Lars& Amthor, Joachim E.& Kukla, Peter A.. Diagenetic Processes and Reservoir Heterogeneity in Salt-Encased Microbial Carbonate Reservoirs (Late Neoproterozoic, Oman). Geofluids. 2019. Vol. 2019, no. 2019, pp.1-19.
https://search.emarefa.net/detail/BIM-1153935
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1153935
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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