The role of detrital components in the petrophysical parameters of Paleogene calcareous-dominated hemipelagic deposits

Opuwari, Mimonitu; Bialik, Or M.; Taha, Nimer; Waldmann, Nicolás

doi:10.1007/s12517-021-07328-4

Cited by 5 publications

(3 citation statements)

References 55 publications

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“…To determine the rock type in a reservoir, it is essential to understand the primary rock properties, such as the mineralogy, texture, grain packing, and other parameters because they influence the petrophysical properties of rocks 10 , 12 , 13 , 17 , 41 , 42 . Lucia's Petrophysical rock classification is a technique used to relate pore size distribution to rock fabric with laboratory measurements of porosity and permeability 43 .…”

Section: Resultsmentioning

confidence: 99%

“…Many authors successfully apply core plug analysis results of porosity and permeability in carbonate and classic environments to quantify the reservoir flow and storage character and determine reservoir quality, e.g. 8 – 13 . An integrated petrophysical reservoir characterization method that involves core, well logs, and sedimentology helps to improve reservoir description by investigating various rock types that ultimately leads to an enhanced oil recovery 14 – 17 .…”

Section: Introductionmentioning

confidence: 99%

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Petrophysical core-based zonation of OW oilfield in the Bredasdorp Basin South Africa

Opuwari

Afolayan

Mohammed

et al. 2022

Sci Rep

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This study aims to generate rock units based on core permeability and porosity of OW oilfield in the Bredasdorp Basin offshore South Africa. In this study, we identified and classified lithofacies based on sedimentology reports in conjunction with well logs. Lucia's petrophysical classification method is used to classify rocks into three classes. Results revealed three lithofacies as A (sandstone, coarse to medium-grained), B (fine to medium-grained sandstone), and C (carbonaceous claystone, finely laminated with siltstone). Lithofacies A is the best reservoir quality and corresponds to class 1, while lithofacies B and C correspond to class 2 and 3, which are good and poor reservoir quality rock, respectively. An integrated reservoir zonation for the rocks is based on four different zonation methods (Flow Zone indicator (FZI), Winland r35, Hydraulic conductivity (HC), and Stratigraphy modified Lorenz plot (SMLP)). Four flow zones Reservoir rock types (RRTs) were identified as RRT1, RRT3, RRT4, and RRT5, respectively. The RRT5 is the best reservoir quality composed of a megaporous rock unit, with an average FZI value between 5 and 10 µm, and HC from 40 to 120 mD/v3, ranked as very good. The most prolific flow units (RRT5 and RRT4 zones) form more than 75% of each well's flow capacities are supplied by two flow units (FU1 and FU3). The RRT1 is the most reduced rock quality composed of impervious and nanoporous rock. Quartz is the dominant framework grain, and siderite is the dominant cement that affects flow zones. This study has demonstrated a robust approach to delineate flow units in the OW oilfield. We have developed a useful regional petrophysical reservoir rock flow zonation model for clastic reservoir sediments. This study has produced, for the first time, insights into the petrophysical properties of the OW oilfield from the Bredasdorp Basin South Africa, based on integration of core and mineralogy data. A novel sandstone reservoir zonation classification criteria developed from this study can be applied to other datasets of sandstone reservoirs with confidence.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Petrophysical core-based zonation of OW oilfield in the Bredasdorp Basin South Africa

Opuwari

Afolayan

Mohammed

et al. 2022

Sci Rep

Self Cite

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“…Each sample was scraped clean, freeze-dried overnight and crushed by mortar and pestle. Each subsample was analyzed for mass-specific bulk magnetic susceptibility (MS) at Utrecht University with a Multi-Function Kappabridge (MFK1-FA), with values reported in χ. MS values of discrete samples were compared to published highresolution data generated by a Multi Sensor Core Logger (MSCL) at Haifa University (Opuwari et al 2021). To enable comparison with the discrete dataset, values from the MSCL were converted from volumespecific MS to mass-specific MS by dividing by density.…”

Section: Magnetic Susceptibility Analysismentioning

confidence: 99%

Late Paleocene to middle Eocene carbon isotope stratigraphy of the Northern Negev, Southern Israel: potential for paleoclimate reconstructions

Fokkema¹,

Buijs²,

Bialik³

et al. 2022

nos

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Sedimentary records depicting significant variability in climate and carbon cycling across the early Paleogene have emerged over the last two decades. Continuous, long-term, high-resolution records mostly derive from deep-sea drill cores, and only few derive from continental margin locations. Here we examine lower Paleogene marls and chalks collected from a core (RH-323) in the Northern Negev Desert (Southern Israel). The studied sediments accumulated on a continental slope of the southern Tethys at ~500-700 m paleodepth and did not undergo deep burial. We analyzed bulk carbonate stable carbon and oxygen isotopes and bulk magnetic susceptibility. The resulting records can be aligned with those from elsewhere and include the Paleocene Carbon Isotope Maximum (PCIM), Paleocene Eocene Thermal Maximum (PETM) and Early Eocene Climatic Optimum (EECO). An obvious realization is a concurrence between local lithological variations and major climate and carbon cycle changes. This has been highlighted for sedimentary sequences elsewhere, but the relations differ in the Negev, such that carbonate rich intervals mark the PCIM and PETM, and a transition from marl to chalk initiates the EECO. Overall, the relatively pristine and immature sediment records in southern Israel likely provide potential for high-resolution paleoclimate and carbon cycle reconstructions during a crucial time interval and in a crucial part of the world.

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Integrated Petrophysical and Heterogeneity Assessment of the Karstified Fahliyan Formation in the Abadan Plain, Iran

2023

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The role of detrital components in the petrophysical parameters of Paleogene calcareous-dominated hemipelagic deposits

Cited by 5 publications

References 55 publications

Petrophysical core-based zonation of OW oilfield in the Bredasdorp Basin South Africa

Petrophysical core-based zonation of OW oilfield in the Bredasdorp Basin South Africa

Late Paleocene to middle Eocene carbon isotope stratigraphy of the Northern Negev, Southern Israel: potential for paleoclimate reconstructions

Integrated Petrophysical and Heterogeneity Assessment of the Karstified Fahliyan Formation in the Abadan Plain, Iran

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