The Experts below are selected from a list of 10863 Experts worldwide ranked by ideXlab platform
Erik Flügel - One of the best experts on this subject based on the ideXlab platform.
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Summarizing Microfacies Criteria: Microfacies Types
Microfacies of Carbonate Rocks, 2020Co-Authors: Erik FlügelAbstract:Microfacies studies aim for the recognition of overall patterns that reflect the history of carbonate rocks, by means of a thorough examination of their sedimentological and paleontological characteristics. The previous chapters have shown which thin-section criteria are used in describing the Microfacies of limestones. The evaluation of Microfacies in the context of facies interpretation requires a synopsis of Microfacies data observed in various samples into a Microfacies type (MFT). Microfacies types and facies associations are fundamental to the development of models for carbonate sedimentation.
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Basin Analysis: Recognizing Depositional Settings
Microfacies of Carbonate Rocks, 2009Co-Authors: Erik FlügelAbstract:This chapter is an overview of tools for translating Microfacies data into depositional settings. Using case studies of non-marine and marine carbonate rocks, we focus on the diagnostic criteria for recognizing the facies characteristics needed in basin analysis studies. Microfacies is an important element of basin analysis, but must be applied along with all the other field and laboratory observations available for reconstructing depositional conditions.
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Microfacies Interpretation: Summarizing Microfacies Criteria: Microfacies Types
Microfacies of Carbonate Rocks, 2009Co-Authors: Erik FlügelAbstract:Microfacies studies aim for the recognition of overall patterns that reflect the history of carbonate rocks, by means of a thorough examination of their sedimentological and paleontological characteristics. The previous chapters have shown which thin-section criteria are used in describing the Microfacies of limestones. The evaluation of Microfacies in the context of facies interpretation requires a synopsis of Microfacies data observed in various samples into a Microfacies type (MFT). Microfacies types and facies associations are fundamental to the development of models for carbonate sedimentation
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Quantitative Microfacies Analysis
Microfacies of Carbonate Rocks, 2009Co-Authors: Erik FlügelAbstract:The previous chapters of this book introduced various aspects of recognizing qualitative Microfacies criteria and their signifcance, whereas this chapter will treat quantitative criteria. The first part describes selected principles of grain-size analysis and demonstrates the potential of grain size in the context of Microfacies studies. The second part deals with methods of frequency analysis and their use in Microfacies-based interpretations. The last part discusses the evaluation of Microfacies by multivariate statistical analyses.
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Microfacies Data: Matrix and Grains
Microfacies of Carbonate Rocks, 2009Co-Authors: Erik FlügelAbstract:The purpose of this chapter is to outline and discuss the criteria used in the description of matrix and grains. Microfacies criteria reflected by fabrics and quantitative Microfacies data are discussed in Chap. 5 and 6.
Shengyin Zhang - One of the best experts on this subject based on the ideXlab platform.
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Microfacies characteristics and reservoir potential of triassic baikouquan formation northern mahu sag junggar basin nw china
Natural Gas Geoscience, 2019Co-Authors: Xinchuan Lu, Xin Chen, Shuncun Zhang, Shengyin ZhangAbstract:Abstract By using data such as lithology, thin sections, sedimentary structure, particle size, logging facies signs, mercury intrusion, porosity and permeability from 34 wells, 11 types of sedimentary Microfacies were divided in this study. Upon analysis, sedimentary Microfacies exert significant control on reservoirs, and high quality reservoirs are primarily developed with the following sedimentary Microfacies: gray sandy conglomerate in underwater distributary channels Microfacies of fan delta fronts sub-facies, river-estuary dams and gray sandstones of distal bars on the front edge of the fan delta that have strong hydrodynamic conditions and good stability. Relatively good reservoirs are primarily distributed in the braided channel in fan-delta plains with brown sandy conglomerates, main channel of underwater distributary channels on the front edge of the fan delta with gray conglomerates and underwater distributary channel ends on the front edge of the fan delta with gray fine sandstones. With the stable tectonic background, Triassic sedimentary Microfacies in the Mahu sag control the distribution and development of reservoirs. Therefore, sites of high quality reservoirs can be predicted by sedimentary Microfacies, and this study provides guidance for oil and gas exploration.
Thomas E Moore - One of the best experts on this subject based on the ideXlab platform.
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Distal facies variability within the Upper Triassic part of the Otuk Formation in northern Alaska
SEPM Special Publication, 2013Co-Authors: K.j. Whidden, M T Whalen, Eric M. Hutton, Thomas E MooreAbstract:The Triassic–Jurassic Otuk Formation is a potentially important source rock in allochthonous structural positions in the northern foothills of the Brooks Range in the North Slope of Alaska. This study focuses on three localities of the Upper Triassic (Norian) limestone member, which form a present-day, 110-km-long, east–west transect in the central Brooks Range. All three sections are within the structurally lowest Endicott Mountain allochthon and are interpreted to have been deposited along a marine outer shelf with a ramp geometry. The uppermost limestone member of the Otuk was chosen for this study in order to better understand lateral and vertical variability within carbonate source rocks, to aid prediction of organic richness, and ultimately, to evaluate the potential for these units to act as continuous (or unconventional) reservoirs. At each locality, 1 to 4 m sections of the limestone member were measured and sampled in detail to capture fine-scale features. Hand sample and thin section descriptions reveal four major Microfacies in the study area, and one diagenetically recrystallized Microfacies. Microfacies 1 and 2 are interpreted to represent redeposition of material by downslope transport, whereas Microfacies 3 and 4 have high total organic carbon (TOC) values and are classified as primary depositional organofacies. Microfacies 3 is interpreted to have been deposited under primarily high productivity conditions, with high concentrations of radiolarian tests. Microfacies 4 was deposited under the lowest relative-oxygen conditions, but abundant thin bivalve shells indicate that the sediment–water interface was probably not anoxic. The Otuk Formation is interpreted to have been deposited outboard of a southwest-facing ramp margin, with the location of the three limestone outcrops likely in relatively close proximity during deposition. All three sections have evidence of transported material, implying that the Triassic Alaskan Basin was not a low-energy, deep-water setting, but rather a dynamic system with intermittent, yet significant, downslope flow. Upwelling played an important role in the small-scale vertical variability in Microfacies. The zone of upwelling and resultant oxygen-minimum zone may have migrated across the ramp during fourth- or fifth-order sea-level changes.
Hong Li - One of the best experts on this subject based on the ideXlab platform.
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Microfacies and depositional environments of the late ordovician lianglitage formation at the tazhong uplift in the tarim basin of northwest china
Journal of Asian Earth Sciences, 2014Co-Authors: Haijun Yang, Lijuan Zhang, Hong LiAbstract:Abstract The Late Ordovician Lianglitage Formation comprises 13 Microfacies (Mf1–Mf13) that were deposited on a carbonate platform at the Tazhong Uplift of the Tarim Basin in Northwest China. Each type of Microfacies indicates a specific depositional environment with a certain level of wave energy. Four primary groups of Microfacies associations (MA1–MA4) were determined. These associations represent different depositional facies, including reef-shoal facies in the platform margin (MA1), carbonate sand shoal facies (MA2) and oncoid shoal (MA3) on open platforms, and lagoon and tidal flat facies (MA4) in the platform interior. Each Microfacies association was generated in a fourth-order sedimentary sequence developing within third-order sequences (SQ1, SQ2, and SQ3, from bottom to top), showing a shallowing-upward trend. High-frequency sequences and facies correlation between wells suggests that the reef-shoal facies more successively developed in the southeastern part of the platform margin, and high-energy Microfacies were more strictly confined by the top boundary of fourth-order sequences in the northwestern part of the platform. The highstand systems tract (HST) of the SQ2 is characterized by reef-shoals that developed along the platform margin and tidal flats and lagoons that developed in the platform interior, while the SQ3 is characterized by the oncoid shoal facies that generally developed on the uplift due to a regionally extensive transgression that occurred during the latter part of the Late Ordovician. The results of this study can be used for investigating the development and distribution of potential reservoirs; the reservoirs in southeastern part of the platform margin may be of premium quality because the high-energy Microfacies were best preserved there.
Xinchuan Lu - One of the best experts on this subject based on the ideXlab platform.
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Microfacies characteristics and reservoir potential of triassic baikouquan formation northern mahu sag junggar basin nw china
Natural Gas Geoscience, 2019Co-Authors: Xinchuan Lu, Xin Chen, Shuncun Zhang, Shengyin ZhangAbstract:Abstract By using data such as lithology, thin sections, sedimentary structure, particle size, logging facies signs, mercury intrusion, porosity and permeability from 34 wells, 11 types of sedimentary Microfacies were divided in this study. Upon analysis, sedimentary Microfacies exert significant control on reservoirs, and high quality reservoirs are primarily developed with the following sedimentary Microfacies: gray sandy conglomerate in underwater distributary channels Microfacies of fan delta fronts sub-facies, river-estuary dams and gray sandstones of distal bars on the front edge of the fan delta that have strong hydrodynamic conditions and good stability. Relatively good reservoirs are primarily distributed in the braided channel in fan-delta plains with brown sandy conglomerates, main channel of underwater distributary channels on the front edge of the fan delta with gray conglomerates and underwater distributary channel ends on the front edge of the fan delta with gray fine sandstones. With the stable tectonic background, Triassic sedimentary Microfacies in the Mahu sag control the distribution and development of reservoirs. Therefore, sites of high quality reservoirs can be predicted by sedimentary Microfacies, and this study provides guidance for oil and gas exploration.