A Universal Classification Scheme For the Microcrystals That Host Limestone Microporosity

Kaczmarek, Stephen E.; Fullmer, Shawn M.; Hasiuk, Franciszek

doi:10.2110/jsr.2015.79

Cited by 79 publications

(47 citation statements)

References 60 publications

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“…12b and 16e). These diagenetic crystals show no petrographic evidence of micropores such as blue haze, and so, most samples fall below the global microporosity trend of Fullmer et al (2014) and Kaczmarek et al (2015). In some cases, associated vugs are not filled with clay, and these samples show elevated permeabilities (> 100 mD) but low porosities (< 10%).…”

Section: Sequence Stratigraphic Correlationmentioning

confidence: 74%

The depositional history of near-surface Qatar aquifer rocks and its impact on matrix flow and storage properties

et al. 2019

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Carbonates and evaporites of Paleogene age form the shallow-aquifer rocks mantling most of Qatar, including the Paleocene and Lower Eocene Umm er Radhuma Formation and the Lower to Middle Eocene Rus and Dammam Formations. A core-based study was carried out to improve general understanding of the stratigraphic controls on aquifer matrix properties in Qatar. A cumulative total of 377 m of 10-cm-diameter core was recovered from three boreholes in central and northern Qatar, drilled to depths of greater than 120 m. Sedimentological attributes of these rocks were investigated through core and thin-section description, X-ray diffraction-based mineralogical assessment, as well as whole-rock stable isotopic analysis and integrated with interpretation of gamma-ray logs. Stratigraphic correlation of the penetrated intervals was then undertaken using sequence stratigraphic concepts and isotope stratigraphy (δ 13 C trends) in the context of recently published regional paleomaps and structural studies. In the area of Qatar, the Umm er Radhuma Formation and the overlying Traina Member of the Rus Formation were deposited in marine settings of two different basins. These basins, which extended to the south and north of Qatar, respectively, are interpreted to have been separated by a topographic high, the location of which was controlled by the presence of high-angle normal faults. The southern basin was more restricted and was the site of extensive evaporite and clay-rich siliciclastic deposition during early stages of Rus Formation. Similar evaporites and fine siliciclastic deposits are not observed in time-equivalent strata of the northern basin. During subsequent deposition of the Al Khor Member of the Rus Formation, as well as the Dammam Formation, the basins appear to have been interconnected, and fine-grained siliciclastic deposits are interbedded with, but subordinate to, carbonate strata across Qatar. Most rocks recovered for this study are dolomitic, and dolomitic rocks free of other mineral phases tend to have significant porosity (20-50%) and permeability (10-1000 mD). Decreased connectivity, flow, and storage capacity are caused by (1) the presence of gypsum beds and nodules (only southern Qatar, upper Umm er Radhuma Formation, and Rus Formation), (2) the presence of pore-occluding clays (typically palygorskite) to varying degrees in all formations, and (3) the occurrence of diagenetic calcites, most commonly in the Dammam Formation. Aquifer quality of the near-surface rocks of Qatar is in large part a function of their depositional history and is to a degree predictable using reconstruction of basin architecture, as well as sequence stratigraphic concepts.

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Section: Sequence Stratigraphic Correlationmentioning

confidence: 74%

The depositional history of near-surface Qatar aquifer rocks and its impact on matrix flow and storage properties

et al. 2019

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“…Duperret et al ., ). Terms for the matrix include microfabric (Duperret et al ., ), nannofacies (Richard et al ., ), microstructure (Aubry, ; Gaviglio et al ., ; Nadah et al ., ; Shitrit et al ., ), texture (Le Roux, ; Kaczmarek et al ., ) and microtexture (Lambert et al ., ; Fabricius et al ., ; Deville de Periere et al ., ; Faÿ‐Gomord et al ., ,b, ). The term adopted for the chalk matrix in this article is microtexture.…”

Section: Introductionmentioning

confidence: 99%

“…Hancock & Kennedy, ) and thus reservoir quality (e.g. Dravis, ; Lucia, ; Melim et al ., ; Maliva et al ., ; Deville de Periere et al ., ; Kaczmarek et al ., ; Regnet et al ., ).…”

Section: Introductionunclassified

Classifying chalk microtextures: Sedimentary versus diagenetic origin (Cenomanian–Santonian, Paris Basin, France)

et al. 2019

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Microtexture describes the type of particles and their arrangement in matrix samples at scanning electron microscopy scale. Although a microtexture classification exists for micritic limestone, it cannot be directly applied to chalk. This study therefore proposes a classification of chalk microtextures and discusses the origin of microtexture variability. Chalk was sampled at thirteen spatio-temporal locations along the coastline of northern France (Cenomanian-Santonian). Four criteria are defined to describe, characterize and determine chalk matrix microtexture: (i) mineralogical content; (ii) biogenic fraction; (iii) micritic fraction; and (iv) cement fraction. From these criteria, two major groups are defined: Pure Chalk Microtexture Group, with seven classes, and Impure Chalk Microtexture Group, divided into two subgroups: Argillaceous Microtexture with four classes and Siliceous Microtexture with two classes. Microtexture variability is related both to initial sedimentation and to diagenesis. Sedimentological conditions (for example, climate and distance from shore) affect chalk composition (carbonate content and type of insoluble particles), thus influencing microtexture. Changes in Pure Chalk Microtexture are the result of increasing diagenetic intensity. This classification can also be used to characterize the microtexture of subsurface chalk reservoirs. Reservoir quality depends on the petrophysical and mechanical properties of reservoir rocks, which can be better understood by exploring their sedimentary and diagenetic history, revealed by the study of chalk microtexture variability.

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“…Facies 3c was imaged using SEM to characterize the type of calcite microcrystals in that host the micro-scale pores in the high-porosity areas (Figure 16). The crystals displayed a granular subhedral texture (Kaczmarek et al, 2015), which are consistent with highporosity, microporous limestones. Based on this texture, the permeability could be estimated as between 2 and 20 millidarcies (Kaczmarek et al, 2015).…”

Section: Davenport and Spring Grove Membersmentioning

confidence: 53%

“…These were mounted and imaged in a JEOL JSM-IT100LA compact scanning electron microscope (Geology Program, Iowa State University). The micropore system was categorized using the system developed by Kaczmarek et al (2015).…”

Section: Sem Imagingmentioning

confidence: 99%

Explaining the difference in freeze-thaw resistance of two similar “high-quality” limestone aggregates

Hussey

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A Universal Classification Scheme For the Microcrystals That Host Limestone Microporosity

Cited by 79 publications

References 60 publications

The depositional history of near-surface Qatar aquifer rocks and its impact on matrix flow and storage properties

The depositional history of near-surface Qatar aquifer rocks and its impact on matrix flow and storage properties

Classifying chalk microtextures: Sedimentary versus diagenetic origin (Cenomanian–Santonian, Paris Basin, France)

Explaining the difference in freeze-thaw resistance of two similar “high-quality” limestone aggregates

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