The characteristics of carbonate system recovery during a relatively dry event in a mixed carbonate/siliciclastic environment in the Pelsonian (Middle Triassic) proximal marginal marine basins: A case study from the tropical Tethyan northwest Gondwana margins

Korngreen, Dorit; Bialik, Or M.

doi:10.1016/j.palaeo.2015.09.026

Cited by 12 publications

(5 citation statements)

References 99 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A possibility for the explanation in a lacustrine basin is due to changes in climate with no substantial changes in depth, which is uncommon in the above models. In such a model, the algal/bioclastic‐rich intervals could correspond to episodes of a dry climate (Figures and ; García‐García, Soria, Viseras, & Fernandez, ; Korngreen & Bialik, ), as reflected in (a) less siliciclastic supply due to a decrease in precipitation and the consequent inactivity of the feeding systems in the source area (Pujalte, Robador, Payros, & Samsó, ); (b) relatively warm temperature that favoured the formation of carbonate sedimentation (e.g., Wright & Burchette, ). In contrast, the siliciclastic‐dominated interval could correspond to a wet climate stage, as suggested by increasing supply of coarse sediments due to intense precipitation in the source area, which give the unlikelihood of tectonic influence (García‐García et al, ; Pujalte et al, ).…”

Section: Discussionmentioning

confidence: 99%

Section: Meter-scale Cyclic Sequences and Their Interpretationsmentioning

confidence: 99%

See 1 more Smart Citation

Sedimentary features and their controls in a mixed siliciclastic–carbonate system in a shallow lake area: An example from the BZ‐X block in the Huanghekou Sag, Bohai Bay Basin, Eastern China

Xie

et al. 2018

Geological Journal

View full text Add to dashboard Cite

Mixed siliciclastic–carbonate sediments were well developed in the BZ‐X block as a subunit in the Huanghekou Sag in the southeastern part of the Bohai Bay Basin (China) during the Member 1 of the Shahejie Formation. An integrated approach based on detailed microscopic observation and core descriptions was applied to characterize the lithofacies types, facies associations, and depositional environment of the mixed sediments system. A detailed sedimentary facies analysis suggests that various lithofacies types can be grouped into four facies associations: mixed bioclastic sandy beaches (FA1), mixed clastic bioclastic shoal (FA2), mixed sandy oolitic shoals (FA3), and mixed distal bioclastic sandy beaches (FA4). These facies associations are interpreted to be deposited in varying depositional environments ranging from foreshore to shoreface setting in a shallow lake setting. An interplay of the climate regime, nearshore carbonate productivity, and current activity was proved to control the lithofacies types, dispersion and depositional environment change of mixed sediments in different depositional phases. Meter‐scale mixed cycles were found in this shallow lake setting and their features seem to differ from the classical mixed sediment models. It is suggested that these particular cycles in the stratigraphic record might indicate a typical mark of mixed sediment system in shallow areas of the lacustrine basin.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Meter-scale Cyclic Sequences and Their Interpretationsmentioning

confidence: 99%

Sedimentary features and their controls in a mixed siliciclastic–carbonate system in a shallow lake area: An example from the BZ‐X block in the Huanghekou Sag, Bohai Bay Basin, Eastern China

Xie

et al. 2018

Geological Journal

View full text Add to dashboard Cite

show abstract

“…Pore structure plays an essential role in the fluid occurrence and flow properties and is one of the main features for evaluating of shale reservoirs [5][6][7][8][9]. Compared with other oil reservoirs such as sandstone and carbonate reservoirs, the pore structure of shale reservoirs is more challenging to evaluate [6][7][8][9][10][11]. This is because the shale reservoirs are always characterized by various mineral compositions, resulting in complex pore throat connectivity and extreme heterogeneity of pore size distributions [8,[10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Compared with other oil reservoirs such as sandstone and carbonate reservoirs, the pore structure of shale reservoirs is more challenging to evaluate [6][7][8][9][10][11]. This is because the shale reservoirs are always characterized by various mineral compositions, resulting in complex pore throat connectivity and extreme heterogeneity of pore size distributions [8,[10][11][12][13]. Thus, effectively evaluating the pore structure of shale reservoirs is necessary and meaningful.…”

Section: Introductionmentioning

confidence: 99%

Evaluating Pore Structure of Shale Reservoirs through Pore Space Multifractal Characterization

Dai

Dong

et al. 2023

Geofluids

View full text Add to dashboard Cite

Characteristics of pore structure are crucial to oil exploration and development in shale reservoirs, but practical evaluation of shale pore structure remains a longstanding challenge. In this study, based on nuclear magnetic resonance transverse relaxation time (T2) spectra under water-saturated and irreducible conditions, total pore space and moveable fluid space were skillfully determined. Meanwhile, multifractal spectra were used to characterize T2 distributions of total pore space and movable fluid space. The results show characteristic parameters of high probability measure areas of multifractal spectra (multifractal parameters) have strong negative correlations with T2 geometric mean value, and average radii of pore and throat increase with a decrease in the multifractal parameters, indicating the shale reservoirs with low values of the multifractal parameters may have good pore structure. Moreover, clay mineral content has strong positive effects on the multifractal parameters. In contrast, (quartz+feldspar) mineral content negatively influences on the multifractal parameters. Finally, new accurate models for permeability estimation in core scale and well-logging scale of shales are both proposed based on the multifractal parameters, which are also applicable for the other reservoirs. Overall, this study is important and timely for evaluating pore structure and predicting permeability in shale reservoirs.

show abstract

“…The E 3 2 shales belong to deep lake and semi-deep saline lacustrine sedimentary environments, which are characterized by tight physical properties and frequent interbedded layers [17,19]. Meanwhile, the saline lacustrine sedimentary background also results in the E 3 2 shales being characterized by various mineral compositions [20,21]. In this study, the aim is to research the effects of the mineral composition on the movable fluid porosity in the micro-nanoscale porous media on the basis of E 3 2 saline lacustrine shales.…”

Section: Introductionmentioning

confidence: 99%

Effects of Mineral Composition on Movable Fluid Porosity in Micro-Nanoscale Porous Media

Dai,

Zhu,

et al. 2023

Energies

View full text Add to dashboard Cite

In natural micro-nanoscale porous media, the movable fluid porosity can effectively represent storage and permeable properties, but various mineral compositions have complicated effects on it. Taking saline lacustrine shale as an example, this study researched the effects of mineral composition on movable fluid porosity, based on nuclear magnetic resonance (NMR), focused ion beam (FIB), and x-ray diffraction (XRD) experiments. The results show that movable fluid porosity exhibits a stronger dependence on porosity than movable fluid saturation does. Micropores (<100 nm) and macropores (>1000 nm) are mostly developed in silicate and gypsum minerals, and have a highly heterogeneous distribution. In contrast, carbonate intercrystalline pores are dominated by mesopores (100−1000 nm), and behave strongly heterogeneously. Many mesopores play a positive role in generating highly movable fluid porosity, but the development of micropores and macropores is not conducive to an increase in movable fluid porosity. Overall, a significant negative effect is observed between silicate mineral content and movable fluid porosity, and carbonate mineral content has a strong positive effect on movable fluid porosity, whereas movable fluid porosity exhibits a relatively small reduction with an increase in the gypsum.

show abstract

The characteristics of carbonate system recovery during a relatively dry event in a mixed carbonate/siliciclastic environment in the Pelsonian (Middle Triassic) proximal marginal marine basins: A case study from the tropical Tethyan northwest Gondwana margins

Cited by 12 publications

References 99 publications

Sedimentary features and their controls in a mixed siliciclastic–carbonate system in a shallow lake area: An example from the BZ‐X block in the Huanghekou Sag, Bohai Bay Basin, Eastern China

Sedimentary features and their controls in a mixed siliciclastic–carbonate system in a shallow lake area: An example from the BZ‐X block in the Huanghekou Sag, Bohai Bay Basin, Eastern China

Evaluating Pore Structure of Shale Reservoirs through Pore Space Multifractal Characterization

Effects of Mineral Composition on Movable Fluid Porosity in Micro-Nanoscale Porous Media

Contact Info

Product

Resources

About