Extensive carbonate cementation of fluvial sandstones: An integrated outcrop and petrographic analysis from the Upper Cretaceous, Book Cliffs, Utah

Taylor, Kevin G.; Machent, Philip G.

doi:10.1016/j.marpetgeo.2011.06.003

Cited by 39 publications

(8 citation statements)

References 59 publications

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“…Carbonate cemented zones intersected at CRC-2 are thought to have developed in the same way as those described in studies of analogue shallow marine systems (Dutton et al, 2002;Taylor and Gawthorpe, 2003;White et al, 2004;Lee et al, 2007;Taylor and Machent, 2010;Taylor and Machent, 2011). The locus of their development is argued to correspond to the highest permeability pathways -the most compositionally and texturally mature sandstones within the succession -through which meteoric fluids carrying the aqueous feedstock of ionic species had flowed most readily (e.g.…”

Section: Introductionmentioning

confidence: 74%

“…The locus of their development is argued to correspond to the highest permeability pathways -the most compositionally and texturally mature sandstones within the succession -through which meteoric fluids carrying the aqueous feedstock of ionic species had flowed most readily (e.g. Davis, 1999;Dutton et al, 2002;Taylor and Gawthorpe, 2003;White et al, 2004;Lee et al, 2007;Taylor and Machent, 2010;Taylor and Machent, 2011). Another possibility is formation within intervals rich in local feedstock and nucleation points provided by detrital carbonate lag (Morad et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Quantified Detection of Carbonate Cementation in Sandstones using Standard Wireline Log Data

Bunch

2019

ASEG Extended Abstracts

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Section: Introductionmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Quantified Detection of Carbonate Cementation in Sandstones using Standard Wireline Log Data

Bunch

2019

ASEG Extended Abstracts

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“…The carbonate cement generally has two significant controls on sandstone reservoir quality: primarily pore-filling late-stage spar that reduces porosity, − and early stage cement that prevents compaction and likely provides a source of dissolved carbonate in the late and/or uplift leaching stages of diagenesis. − With the exception of sample Z129, carbonate cement content in all samples is less than 2%. The correlation of carbonate content with porosity is weak (correlation coefficient, 0.01; Figure ), suggesting that carbonate cementation has a limited effect on total porosity of these samples.…”

Section: Discussionmentioning

confidence: 99%

Diagenetic Controls on the Reservoir Quality of Fine-Grained “Tight” Sandstones: A Case Study Based on NMR Analysis

et al. 2018

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Accurate description of diagenetic controls on reservoir quality in “tight” sandstones can be difficult because of the inherent fine grain size and complex components of such oil reservoirs. In this study, petrological techniques and nuclear magnetic resonance (NMR) analysis were applied to fine-grained tight sandstones with varying grain sizes in order to reveal the diagenetic controls on reservoir quality. Results show that macropores in tight sandstones occur mainly as intergranular and dissolution pores, whereas micropores are distributed within ductile rock fragments, clay, and mica minerals, as well as occurring as dissolution micropores. Pore size distribution (PSD)/T 2 spectra display three distribution patterns: (i) a macropore-dominant bimodal distribution, (ii) a macropore–micropore bimodal distribution, and (iii) a micropore-dominant skewed distribution. A decrease in grain size correlates with weaker framework support of particles and thus more intensive mechanical compaction, resulting in the loss of both macroporosity and microporosity. Consequently, PSD change from macropore-dominant bimodal distributions to micropore-dominant skewed distributions as the pore type shifts from being dominated by macropores to intragranular micropores. In fine-grained sandstones, an increase in the abundance of ductile components corresponds to a loss of total porosity, related to the decrease in abundance of macropores, whereas the change in micropore abundance is negligible. This change is reflected in PSD by a shift from macropore-dominant bimodal distributions to macro–micropore bimodal distributions. The authigenic minerals in tight sandstone reservoirs occur mainly as late-stage carbonate minerals, and the precipitation of this carbonate cement preferentially occurs within macropores. When carbonate cement content is low, it has a limited influence on total porosity. However, it does significantly reduce the connectivity of the pore system, which is different from what might be expected in conventional sandstone reservoirs. Therefore, particle grain size, the abundance of ductile components, and late-stage cementation all contribute to the prediction of reservoir quality in oil-bearing tight sandstones.

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“…Intensive diagenesis can result in low matrix porosity and permeability, and thus reduce the reservoir potential in alluvial-fluvial deposits (Morad et al, 2010;Lai et al, 2018). Carbonate cement is one of the prevailing authigenic minerals in these deposits (Hall et al, 2004;Taylor and Machent, 2011). In tectonically active settings, such as foreland basin margins, carbonate extrabasinal grains can become important sediments in alluvial-fluvial systems (Valloni and Zuffa, 1984;Morad et al, 2010).…”

Section: Reservoir Potential Of Folded Alluvial-fluvial Successions At Foreland Basin Marginsmentioning

confidence: 99%

Fluvial sedimentation and its reservoir potential at foreland basin margins: A case study of the Puig-reig anticline (South-eastern Pyrenees)

X¹,

Alcalde²,

Gomez‐Rivas³

et al. 2021

Preprint

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Fluvial fans represent one of the dominant sedimentary systems at the active margins of non-marine foreland basins. The Puig-reig anticline at the north-eastern margin of the Ebro Foreland Basin (SE Pyrenees, Spain) exposes continuous outcrops of late Eocene-early Oligocene fluvial deposits, from proximal to medial fluvial fan environments. The proximal deposits, located in the northern limb of the anticline, especially in the northwest zone, are characterised by conglomerates with minor interbedded sandstones, which present thick and wide sheet-like geometries with unscoured or scoured basal surfaces. These are interpreted to be the deposits of unconfined flash floods and wide-shallow channel streams. The medial deposits, covering the rest of the anticline, consist of interbedded beds of conglomerates, sandstones and claystones, deposited from braided channel streams and overbanks. Distal deposits are found towards the south, beyond the anticline, and are characterised by sandstone and clay deposits of terminal lobes or lacustrine deltas and interdistributary bays. This study assesses the impact of the primary depositional characteristics, diagenesis and deformation of the most heterolithic portion of the system, with implications for the understanding of folded fluvial reservoirs. Diagenetic processes, mainly mechanical compaction and calcite cementation, resulted in overall low matrix porosity, with limited relatively higher porosity developed in sandstone lithofacies in the medial deposits. Deformation associated with thrusting and fold growth resulted in the formation of abundant fractures, with relatively higher fracture intensities observed in sandstone lithofacies in the anticline crest. This study shows that post depositional processes can both improve and diminish the reservoir potential of basin proximal fluvial deposits, by the development of open fracture networks and by compaction-cementation, respectively. The comparison of the Puig-reig anticline with other similar settings worldwide shows that foreland basin margin locations can be potential areas for effective reservoirs, even in the case of low matrix porosity.

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Extensive carbonate cementation of fluvial sandstones: An integrated outcrop and petrographic analysis from the Upper Cretaceous, Book Cliffs, Utah

Cited by 39 publications

References 59 publications

Quantified Detection of Carbonate Cementation in Sandstones using Standard Wireline Log Data

Quantified Detection of Carbonate Cementation in Sandstones using Standard Wireline Log Data

Diagenetic Controls on the Reservoir Quality of Fine-Grained “Tight” Sandstones: A Case Study Based on NMR Analysis

Fluvial sedimentation and its reservoir potential at foreland basin margins: A case study of the Puig-reig anticline (South-eastern Pyrenees)

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