Geochemical and lithological controls on a potential shale reservoir: Carboniferous Holywell Shale, Wales

Newport, Leo P.; Aplin, Andrew C.; Gluyas, Jon; Greenwell, H. Christopher; Gröcke, Darren R.

doi:10.1016/j.marpetgeo.2015.11.026

Cited by 33 publications

(15 citation statements)

References 47 publications

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“…Spatial and temporal lithofacies distribution controlling the shale reservoir quality are defined by a combination of organic geochemical, mineralogical, and petrographic data, which are a response to depositional setting and sedimentation processes. (Ma et al, 2016;Newport et al, 2016). Seven lithofacies, which can be differentiated by TOC, bedding, and total clay content, were deposited at different water depths.…”

Section: Depositional Setting and Processesmentioning

confidence: 99%

“…The term "lithofacies," as defined by Eberzin (1940), is the basic unit that constitutes a shale reservoir, reflecting an integration of all the important lithologic features of sedimentary rocks, such as mineral composition, organic matter content, rock texture, sedimentary structure, bedding, color, size distribution, roundness, and sorting (Dill et al, 2005). The global success of shale oil exploration shows that the lithofacies characterization is an effective and significant approach to allow understanding of the accumulation of organic matter, depositional processes, chemical characteristics of the water column, and most importantly, identification of favorable reservoir intervals (Loucks and Ruppel, 2007;Wang and Carr, 2012;Newport et al, 2016;Tang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Lithofacies and depositional setting of a highly prospective lacustrine shale oil succession from the Upper Cretaceous Qingshankou Formation in the Gulong sag, northern Songliao Basin, northeast China

et al. 2019

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The lacustrine shale of the Upper Cretaceous Qingshankou Formation is the principal prospective unconventional target lithology, acting as source, reservoir, and seal. Lithofacies and associated storage capacity are two significant factors in shale oil prospectivity. This paper describes an investigation of the lower Qingshankou Formation lacustrine shale based on detailed description and analysis of cores, shale lithofacies characteristics, depositional setting, and stacking patterns.Seven lithofacies are recognized based on organic matter content, sedimentary structure, and mineralogy, all exhibiting rapid vertical and lateral changes controlled by the depositional setting and basin evolution. An overall trend from shallow-water to deep-water depositional environments is interpreted from the characteristics of the infilling sequences, characterized by increasing total organic carbon (TOC) and total clay content and decreasing layer thickness (i.e., from bedded to laminated then to massive sedimentary structures). Periods of deposition during shallowing cycles show a reverse trend in the sedimentary characteristics described above. The sedimentary rocks in the studied interval show three complete short-term cycles, each one containing progressive and regressive system tracts.

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Section: Depositional Setting and Processesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lithofacies and depositional setting of a highly prospective lacustrine shale oil succession from the Upper Cretaceous Qingshankou Formation in the Gulong sag, northern Songliao Basin, northeast China

et al. 2019

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“…4i), although calcareous mudstones contain predominantly amorphous OM (OM that aligns along bedding and distorts around grains), inferred to originate from marine sources (Type II kerogen; e.g. Hackley & Cardott 2016;Newport et al 2016;Fig. 4f ).…”

Section: Distribution Of Organic Matter In the Slope Successionmentioning

confidence: 99%

Sedimentology and microfacies of a mud-rich slope succession: in the Carboniferous Bowland Basin, NW England (UK)

Newport

Jerrett

Taylor

et al. 2017

JGS

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A paucity of studies on mud-rich basin slope successions has resulted in a significant gap in our sedimentological understanding in these settings. Here, macro-and micro-scale analysis of mudstone composition, texture and organic matter was undertaken on a continuous core through a mud-dominated slope succession from the Marl Hill area in the Carboniferous Bowland Basin. Six lithofacies, all dominated by turbidites and debrites, combine into three basin slope facies associations: sediment-starved slope, slope dominated by low-density turbidites and slope dominated by debrites. Variation in slope sedimentation was a function of relative sea-level change, with the sediment-starved slope occurring during maximum flooding of the contemporaneous shelf, and the transition towards a slope dominated by turbidites and then debrites occurring during normal or forced shoreline progradation towards the shelf margin. The sediment-starved slope succession is dominated by Type II kerogen, whereas the slope dominated by low-density turbidites is dominated by Type III kerogen. This study suggests that mud-dominated lower slope settings are largely active depositional sites, with consistent evidence for sediment traction. Additionally, the composition and texture of basin slope mudstones, as well as organic content, vary predictably as a function of shelf processes linked to relative sea-level change.

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“…This is necessary because the minerals present in the shales may have been affected by other conditions such as weathering and burial diagenesis at variable conditions and these methods have been used by various authors (e.g. Morton, 1985;Fralick & Kronberg, 1997;Garzanti et al, 2013;Newport et al, 2016) to tell the conditions. The black shales of the Belata Formation probably originated from the hidden felsic igneous basement rock of Peninsular Malaysia, similar to what was described by Baioumy et al (2016) for the other shales in the Peninsular.…”

Section: Resultsmentioning

confidence: 99%

Mineralogical analyses of Belata Black Shale, Perak, Peninsular Malaysia

Boateng¹,

Gebretsadikab²,

Sum

et al. 2020

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Although Peninsular Malaysia comprises of 25% Paleozoic black shales, these shales have very little published literatures on their mineralogical content. This study employs the use of X-ray diffraction analyses to characterize the mineralogical composition of the Belata Black shales. The findings of the study indicate that the black shales of Belata Formation are dominated by felsic minerals such as quartz and feldspars. Minerals such as muscovite, calcite, pyrite, kaolinite and chlorite are also present, and this may indicate a felsic source rock for the shales. The study of the source of sediments helps in revealing the processes they have gone through and may together be used with the weathering, transport, deposition and burial history of the sediment to analyze their thermal maturity.

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Geochemical and lithological controls on a potential shale reservoir: Carboniferous Holywell Shale, Wales

Cited by 33 publications

References 47 publications

Lithofacies and depositional setting of a highly prospective lacustrine shale oil succession from the Upper Cretaceous Qingshankou Formation in the Gulong sag, northern Songliao Basin, northeast China

Lithofacies and depositional setting of a highly prospective lacustrine shale oil succession from the Upper Cretaceous Qingshankou Formation in the Gulong sag, northern Songliao Basin, northeast China

Sedimentology and microfacies of a mud-rich slope succession: in the Carboniferous Bowland Basin, NW England (UK)

Mineralogical analyses of Belata Black Shale, Perak, Peninsular Malaysia

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