Permeability and Water Saturation Distribution by Lithologic Facies and
Hydraulic Units: A Reservoir Simulation Case Study

Shenawi, Shamsuddin; White, Jerry; Elrafie, Emad A.; El-Kilany, Khaled

doi:10.2523/105273-ms

Cited by 17 publications

(9 citation statements)

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“…For rock typing, the common porosity-permeability X-Y plot, and quality parameters, the discrete rock typing (DRT) technique of Shenawi (2007) was applied. The DRT equation was modi ed by El Sharawy and Nabawy (2018), and further modi ed as follows.…”

Section: Methodsmentioning

confidence: 99%

Petrophysical characterization, microfacies analysis, and diagenetic attributes of the Lower Jurassic surface analog sequence in Gebel El-Maghara area, north Sinai, Egypt

Nabawy

Abudeif

Masoud

2021

Preprint

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This study concerns with the petrophysical characteristics of the Lower Jurassic surface analog in Gebel El-Maghara area (from base to top Mashaba, Rajabia, and Shusha formations), north Sinai, Egypt and implementation of the mineral components and diagenetic controls on reservoir characteristics. A full set of petrophysical measurements including porosity (∅He), permeability (k), grain and bulk densities (σg and σb, respectively), and true formation resistivity factor was applied. The Lower Jurassic sequence is subdivided into five hydraulic flow units (HFUs) that consist of three reservoir rock types (RRTs). These RRTs are composed of three microfacies association (MFAs). The RRT1 plug samples consist of the mostly clastic MFA1; they are porous, permeable, and have good reservoir quality that is using the flow zone indicator (FZI), and the reservoir quality index (RQI). The lowest reservoir quality is assigned to the RRT samples which are mostly composed tight carbonates. Based on the petrographical studies, SEM imaging, and the XRD analysis, dissolution and fracturing slightly enhanced the reservoir potentiality of the RRT1 samples, whereas physical compaction, tight cementation, and authigenic clay content (kaolinite, hematite, and goethite) are responsible for deterioration of the reservoir properties of RRT3 samples and reduction of the RRT2 samples.

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Section: Methodsmentioning

confidence: 99%

Petrophysical characterization, microfacies analysis, and diagenetic attributes of the Lower Jurassic surface analog sequence in Gebel El-Maghara area, north Sinai, Egypt

Nabawy

Abudeif

Masoud

2021

Preprint

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“…They show a remarkable efficiency compared to other approaches. (Bustamante, Keller, & Monson, 2005) (Jutila & Goodwin, 2006) (Elrafie, White, & Awami, 2008) (Junker, Dose, Plas, & Little, 2006) (Gruenwalder, Poellitzer, & Clemens, 2007) (Elrafie, White, & Awami, 2008) (Shenawi, White, Elrafie, & El-Kilany, 2007).…”

Section: Approaches To History Matching and Uncertainty Quantificationmentioning

confidence: 99%

Bridging the Gap Between Deterministic and Probabilistic Uncertainty Quantification Using Advanced Proxy Based Methods

Goodwin

2015

SPE Reservoir Simulation Symposium

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The use of proxy models for optimisation of expensive functions has demonstrated its value since the 1990's in many industries. Within reservoir engineering, similar techniques have been used for over a decade for history matching, both in commercial tools and in-house software.In addition to efficient history matching, proxy models have a distinct advantage when performing uncertainty quantification of probabilistic forecasts. Markov Chain Monte Carlo (MCMC) methods cannot realistically be applied directly with reservoir simulations, and even fast proxy models can fail dramatically to adequately represent the range of uncertainty if implemented without due care.A pitfall of the use of proxy models is that they are considered 'black box' and their quality is difficult to measure. Engineers prefer to deal with deterministic simulation models which they can evaluate and understand.The main pitfall of simple random walk MCMC techniques, which have begun to appear within reservoir engineering workflows, is a focus on theoretical properties which are not observed in practical implementations. This gives rise to potential gross errors, which are not generally appreciated by practitioners. Advances in recent years within the field of Bayesian statistics have significantly improved this situation, but have not yet been disseminated within the oil and gas industry. This paper describes the limitations of random walk MCMC techniques which are currently used for reservoir prediction studies, and shows how Hamiltonian MCMC techniques, together with an efficient implementation of proxy models, can lead to a more reliable and validated probabilistic uncertainty quantification, whilst also generating a suitable ensemble of deterministic reservoir models. Scientific comparison studies are performed for both an analytical case and a realistic reservoir simulation case to demonstrate the validity of the approach.The benefit of this methodology is to allow asset teams to effectively manage reservoir decisions using a robust and validated understanding of uncertainty. It lays the scientific foundations for the next generation of uncertainty tools and workflows.

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“…So, well logs and analysis of rock samples in the laboratory are methods widely used to evaluate the physical properties of geological formations in the petrophysical characterization of carbonate reservoirs (Aguilera & Aguilera, 2001). The data resolution and the spatial coverage in these two methods, combined with the amount of measured parameters, occur in different ranges to obtain knowledge of the lithology and subsurface structural information (Shenawi et al, 2007). Thus, the proposed study aims to explore the advantages of these two techniques, even adding the geological interpretation, to evaluate, from the petrophysical point of view, a set of data from a carbonate reservoir in Oilfield B in Campos Basin.…”

Section: Introductionmentioning

confidence: 99%

Petrophysical characterization of Albian carbonate reservoir in Campos Basin using a multivariate approach with well logs and laboratory measurements

Silva¹,

Carrasquilla²

2016

Proceedings of the 7 Simpósio Brasileiro De Geofísica

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Permeability and Water Saturation Distribution by Lithologic Facies and Hydraulic Units: A Reservoir Simulation Case Study

Cited by 17 publications

References 0 publications

Petrophysical characterization, microfacies analysis, and diagenetic attributes of the Lower Jurassic surface analog sequence in Gebel El-Maghara area, north Sinai, Egypt

Petrophysical characterization, microfacies analysis, and diagenetic attributes of the Lower Jurassic surface analog sequence in Gebel El-Maghara area, north Sinai, Egypt

Bridging the Gap Between Deterministic and Probabilistic Uncertainty Quantification Using Advanced Proxy Based Methods

Petrophysical characterization of Albian carbonate reservoir in Campos Basin using a multivariate approach with well logs and laboratory measurements

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