Integration of Electrofacies and Hydraulic Flow Units to Delineate Reservoir Quality in Uncored Reservoirs: A Case Study, Nubia Sandstone Reservoir, Gulf of Suez, Egypt

Sharawy, Mohamed S. El; Nabawy, Bassem S.

doi:10.1007/s11053-018-9447-7

Cited by 67 publications

(15 citation statements)

References 29 publications

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“…One of the most important targets of core studies is to calibrate log data; that is why core data are regarded as ground truth in reservoir study. The recognition of reservoir quality is essential in reservoir characterization, as it describes a reservoirÕs storage capacity, which is a function of porosity and venerability, which in turn are a function of permeability (El Sharawy and Nabawy 2019).…”

Section: Introductionmentioning

confidence: 99%

Determination of Reservoir Flow Units from Core Data: A Case Study of the Lower Cretaceous Sandstone Reservoirs, Western Bredasdorp Basin Offshore in South Africa

2020

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The overarching aim of this study is to use core measurements of porosity and permeability in three wells (MO1, MO2, and MO3) to generate a scheme of sandstone reservoir zonation for identification of flow units in the E-M gas field of the Western Bredasdorp Basin Offshore in South Africa. The evaluation method began by establishing rock types within a geological framework that allowed the definition of five facies, grouped as facies A, B, C, D, and E. Facies A was recognized as the best petrophysical rock type. In contrast, facies E was recognized as impervious rock. The results of independent reservoir classification methods were integrated to identify flow zones that yielded positive results. The results ultimately culminated in a zonation scheme for the Basin. Twelve flow zones were identified and were broadly classified as high, moderate, low, very low, and tight zones. The high zone was characterized by pore throat radius of ‡ 10 lm, flow zone index (FZI) of ‡ 5.0 lm, and flow unit efficiency (FUE) of ‡ 0.8. In contrast, very low efficiency zones had pore throat radius and FZI of < 2 lm, and FUE of £ 0.2. The high-efficiency zones were comparable to facies A and the tight zone to facies E. Facie C provided sand-sand contacts that allowed flow between the zones. One high, two moderate, four low, and five very low efficiency zones were identified. The plot of FUE can be compared directly with flowmeter logs. The results obtained from this study will serve as an input parameter for reservoir studies in the western Bredasdorp Basin.

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Section: Introductionmentioning

confidence: 99%

Determination of Reservoir Flow Units from Core Data: A Case Study of the Lower Cretaceous Sandstone Reservoirs, Western Bredasdorp Basin Offshore in South Africa

2020

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“…These methods have been previously studied in several researches done by Timur (1968), Winland (1972Winland ( , 1976, Kolodzie (1980), Amaefule et al (1993), Tiab and Donaldson (2012). Many other research studies have been done to apply and test these models in different reservoirs for example (Nabawy and Al-Azazi 2015;El Sharawy and Nabawy 2019).…”

Section: Introductionmentioning

confidence: 99%

Integrated reservoir characterization and fluid flow distribution of the Kaimiro Formation, Taranaki Basin, New Zealand

Shalaby

Sapri

Islam

2020

J Petrol Explor Prod Technol

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An integrated reservoir characterization study is achieved on the Early to Middle Miocene Kaimiro Formation in the Taranaki Basin, New Zealand, to identify the quality of the formation as a potential reservoir. The Kaimiro Formation is a section of the Kapuni Group in the Taranaki Basin, consisting mainly of sandstone and a range of coastal plain through shallow marine facies. Several methods were accomplished for this study: petrophysical evaluation, sedimentological and petrographical descriptions and well log analysis. Based on the petrophysical study, the Kaimiro Formation is interpreted to have several flow units ranges up to 15 μm. Higher RQI and FZI reflect potential reservoir, while the pore size and pore throat diameters (r35) are found to be within the range of macro- and megapores, on the contrary to macropores related to poor reservoir quality concentrated in Tui-1 well. This is in good agreement with other measurements that show the formation is exhibited to be a good promising reservoir as the formation comprises a good average porosity of 19.6% and a good average permeability of 879.45 mD. The sedimentological and petrographical studies display that several diagenetic features have been affecting the formation such as compaction, cementation, dissolution and the presence of authigenic clay minerals. Although these features commonly occur, the impact on the reservoir properties and quality is minor as primary and secondary pores are still observed within the Kaimiro sandstone. Moreover, well log analysis is also completed to further ensure the hydrocarbon potential of the formation through a qualitative and quantitative analysis. It has been confirmed that the Kaimiro Formation is a promising reservoir containing several flow units with higher possibility for storage capacity.

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“…Furthermore, researches on macro-mechanical strength of rocks in TES systems in shallow aquifers including traditional rock fracturing Zhou, 2015, 2017a,b;Bi et al, 2016a,b;Zhao et al, 2016Zhao et al, , 2017aZhao et al, ,b, 2018aZhao et al, , 2019Zhou et al, in press;Zhou and Bi, 2016), hydraulic fracturing (Breede et al, 2013;Zhao et al, 2018b), thermal fracturing (Zhou and Bi, 2018), shear stimulation (Zhu and Huang, 2019), and multilateral wells (Shi et al, 2018). And then, the mechanical characters of hot dry rock under thermohydro-mechanical (THM) effect (Breede et al, 2013;Possemiers et al, 2014;AbuAisha et al, 2016;Holmslykke et al, 2017;Schmidt et al, 2017;Chen et al, 2018;Kumari et al, 2018;Pandey et al, 2018;El Sharawy and Nabawy, 2019) also can be borrowed in to TES systems. These studies are focused on the influence of thermal effect on the mechanical properties of sandstone.…”

Section: Introductionmentioning

confidence: 99%

Effect of High Temperature and High Pressure of Water on Micro-Characteristic and Splitting Tensile Strength of Gritstone

Zhao

Zhou

et al. 2019

Front. Earth Sci.

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To investigate the role of gritstone after hydro-thermal treatment on the mechanical properties and deformation failure behavior, the Brazilian test are carried out on gritstone specimens. Using load-displacement curves, the peak load and peak displacement of the gritstone specimens are analyzed in detail. The mechanical parameters are closely related to the high temperature, high pressure of water and the cooling down methods. The static splitting tensile strength (STS S ) of specimens are decreasing with the increase of water pressure. In the cooling down group, the STS S and peak displacement of specimen WP1 are the lowest one. While, the STS S of specimen W1 is the biggest one. The differences in mechanical properties of the gritstone specimen are mainly caused by the ablation effect in the microscale under different HTHP and cooling down conditions. The surface deformation characteristics of the tested gritstone specimens are investigated by analyzing the full strain field and the local strain concentration. In the gritstone specimen, the major principal strain is first concentrated in the bottom or the top of gritstone specimens where the crack is initiated. The small jump of local strain means crack initiation and propagation, while the fracture of strain gauge leads to strain mutation. The SEM results are discussed to describe the fracture mechanism of brittle gritstone after HTHP treatment.

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Integration of Electrofacies and Hydraulic Flow Units to Delineate Reservoir Quality in Uncored Reservoirs: A Case Study, Nubia Sandstone Reservoir, Gulf of Suez, Egypt

Cited by 67 publications

References 29 publications

Determination of Reservoir Flow Units from Core Data: A Case Study of the Lower Cretaceous Sandstone Reservoirs, Western Bredasdorp Basin Offshore in South Africa

Determination of Reservoir Flow Units from Core Data: A Case Study of the Lower Cretaceous Sandstone Reservoirs, Western Bredasdorp Basin Offshore in South Africa

Integrated reservoir characterization and fluid flow distribution of the Kaimiro Formation, Taranaki Basin, New Zealand

Effect of High Temperature and High Pressure of Water on Micro-Characteristic and Splitting Tensile Strength of Gritstone

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