Depositional, diagenetic, and sequence stratigraphic constrains on reservoir characterization: a case study of middle Jurassic Samana Suk Formation, western Salt Range, Pakistan

被引:0
作者
Bilal Wadood
Mansoor Aziz
Junaid Ali
Nasar Khan
Jamal Wadood
Ahmad Khan
Muhammad Shafiq
Mohib Ullah
机构
[1] Northwest University,State Key Laboratory of Continental Dynamics, Department of Geology
[2] University of Swabi,Department of Geology
[3] University of Malakand,Department of Geology
[4] Bacha Khan University,Department of Geology
[5] Shaanxi Normal University,College of Geography and Tourism
来源
Journal of Sedimentary Environments | 2021年 / 6卷
关键词
Microfacies; Sequence stratigraphy; Reservoir; Depositional environment; Jurassic; Samana Suk Formation;
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摘要
The present study integrates microfacies and diagenesis to construct a sequence stratigraphic framework and evaluate petroleum reservoir prospects of the middle Jurassic Samana Suk Formation, exposed in the western Salt Range, Pakistan. The rock unit is mainly composed of limestone, and marls with minor sandstone lithofacies. Based on the detailed petrographic, scanning electron microscopic, and energy-dispersive X-ray spectroscopic data, a total of four microfacies are identified, suggesting deposition of Samana Suk Formation in three different depositional environments including open marine, lagoon, and beach settings. Based on interpreted sea-level fluctuations from the microfacies data, a sequence stratigraphic framework is constructed. The Samana Suk Formation has witnessed one 2nd-order local cycle and 3rd-order sequences. The 3rd-order sequence holds three Highstand Systems Tracts (HSTs), two Transgressive Systems Tracts (TSTs), and a Lowstand Systems Tract (LST). The LST sandstone deposits show relatively higher microscopic porosity than the carbonates of HST and TST. The diagenetic modifications including compaction, shallow micritization, and heavy cementation have diminished the porosity of TST and HST limestone deposits. However, the effect of such diagenetic alterations is relatively less pronounced in LST deposits. The sea-level curve constructed from the local depositional pattern mismatch with the global sea-level curve probably because of the effect of local tectonics. The integrated porosity measurements based on outcrop, petrography, and scanning electron microscopy data revealed poor to moderate reservoir potential for the limestone and sandstone lithofacies of the studied rock unit, respectively.
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页码:131 / 147
页数:16
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共 149 条
[1]  
Abdelkarim AA(2019)High-resolution lithofacies and porosity modeling of the mixed siliciclastic–carbonate deposits of the Burdigalian Dam Formation, Eastern Saudi Arabia International Journal of Earth Sciences 108 155-172
[2]  
Abdullatif OM(1997)Jurassic shelf sedimentation and sequence stratigraphy of the Surghar Range, Pakistan Journal of Nepal Geology Society 15 15-22
[3]  
Babalola LO(2020)Integrating the palynostratigraphy, petrography, X-ray diffraction and scanning electron microscopy data for evaluating hydrocarbon reservoir potential of Jurassic rocks in the Kala Chitta Range, Northwest Pakistan Journal of Petroleum Exploration and Production Technology 50 1305-1326
[4]  
Makkawi MH(1980)Genesis & diagenesis of Holocene evaporitic sediments in Hutt and Leeman lagoons, Western Australia Journal of Sedimentary Research 111 815-851
[5]  
Yassin MA(2020)Carbonate reservoir outcrop analogues with a glance at pore-scale (Middle Jurassic, Lusitanian Basin, Portugal) Marine and Petroleum Geology 43 965-984
[6]  
Ahmed S(1973)The dorag dolomitization model, application to the middle Ordovician of Wisconsin Journal of Sedimentary Research 5 15-32
[7]  
Mertmann D(1966)Boring algae, micrite envelopes and lithification of molluscan biosparites Geological Journal 26 B53-B54
[8]  
Manutsoglu E(1954)Relationship between porosity and chemical composition of carbonate rocks Petroleum Engineer 54 207-250
[9]  
Ahmad S(1970)Geologic nomenclature and classification of porosity in sedimentary carbonates AAPG Bulletin 30 161-173
[10]  
Wadood B(2012)Dolomitization of the lower Ordovician Catoche formation: Implications for hydrocarbon exploration in western New foundland Marine and Petroleum Geology 55 63-161