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  1. Grain Composition and Diagenesis of Organic-Rich Lacustrine Tarls, Triassic Yanchang Formation, Ordos Basin, China.Kitty L. Milliken, Ying Shen, Lucy T. Ko & Quansheng Liang - 2017 - Interpretation: SEG 5 (2):SF189-SF210.
    The role of the primary detrital grain assemblage as a control on diagenetic pathways is reasonably well-understood in sandstones and limestones, but less so in mudrocks. We have documented diagenesis in mudstones from the Triassic Yanchang Formation that are dominated by grains derived from outside the basin of deposition. Major extrabasinal grains are K-rich clay, quartz, plagioclase, K-feldspar, lithic fragments, and micas. In terms of the quartz-feldspar-lithic grain compositions, the silt fraction in these samples is classified as arkose. Grains of (...)
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  • Controls on Pore Types and Pore-Size Distribution in the Upper Triassic Yanchang Formation, Ordos Basin, China: Implications for Pore-Evolution Models of Lacustrine Mudrocks.Lucy T. Ko, Robert G. Loucks, Kitty L. Milliken, Quansheng Liang, Tongwei Zhang, Xun Sun, Paul C. Hackley, Stephen C. Ruppel & Sheng Peng - 2017 - Interpretation: SEG 5 (2):SF127-SF148.
    Our main objectives are to learn if pore-evolution models developed from marine mudrocks can be directly applied to lacustrine mudrocks, investigate what controls the different pore types and sizes of Chang 7 organic matter -rich argillaceous mudstones of the Upper Triassic Yanchang Formation, and describe the texture, fabric, mineralogy, and thermal maturity variation in the Chang 7 mudstones. Lacustrine mudstones from nine cored wells along a depositional dip in the southeastern Ordos Basin, China, were investigated. Helium porosimetry, nitrogen adsorption, and (...)
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  • Chemostratigraphic Insights Into Fluvio-Lacustrine Deposition, Yanchang Formation, Upper Triassic, Ordos Basin, China.Harry Rowe, Xiangzeng Wang, Bojiang Fan, Tongwei Zhang, Stephen C. Ruppel, Kitty L. Milliken, Robert Loucks, Ying Shen, Jianfeng Zhang, Quansheng Liang & Evan Sivil - 2017 - Interpretation: SEG 5 (2):SF149-SF165.
    A chemostratigraphic study of a 300 m long core recovered from the southeastern central Ordos depocenter reveals thick intervals of fine-grained, organic-rich lacustrine strata, interpreted to represent deepwater deposition under meromictic conditions during lake highstand phases, interspersed with thick intervals of arkosic sandstones, reflective of fluvio-deltaic deposition during lake lowstand phases. Along with elevated concentrations of %Al, traditionally a proxy for clay content, maximum total-organic-carbon values in the deepwater lacustrine facies reach 8%, with average values of approximately 3%. The fine-grained, (...)
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  • Facies, Rock Attributes, Stratigraphy, and Depositional Environments: Yanchang Formation, Central Ordos Basin, China.Stephen C. Ruppel, Harry Rowe, Kitty Milliken, Chao Gao & Yongping Wan - 2017 - Interpretation: SEG 5 (2):SF15-SF29.
    The Late Triassic Yanchang Formation is a major target of drilling for hydrocarbons in the Ordos Basin. Although most of the early focus on this thick succession of lacustrine rocks has been the dominant deltaic sandstones and siltstones, which act as local reservoirs of oil and gas, more recent consideration has been given to the organic-rich mudstone source rocks. We used modern chemostratigraphic analysis to define vertical facies successions in two closely spaced cores through the Chang 7 Member, the primary (...)
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  • Petrophysical Properties Difference of Organic-Rich and Organic-Poor Shale Reservoir Using Low-Field Nuclear Magnetic Resonance Experiment in the Sangzhi Block, South China.Gang Zhao, Wenlong Ding, Yaxiong Sun, Siyu Shi, Baocheng Jiao, Li Tian, Peng Chen, Zhan Zhao & Ning Sun - 2020 - Interpretation 8 (4):T895-T905.
    The petrophysical properties of rocks have an important influence on shale quality. To characterize the difference of petrophysical properties between organic-rich and organic-poor shale reservoirs, we used the low-field nuclear magnetic resonance technique and field emission scanning electron microscopy analysis after argon-ion polishing or natural section to measure porosity and permeability from six core samples from well SY6 in the Sangzhi block, Northwest Hunan province. Some information about pore types, pore structure, residual porosity, movable porosity, and permeability based on the (...)
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  • Pore-Throat Structures and Their Control of Terrestrial Lacustrine Tight Reservoir Quality: The Permian Lucaogou Formation, Jimsar Sag, Northwestern China.Ke Ma, Jiagen Hou, Lin Yan & Fuli Chen - 2018 - Interpretation: SEG 6 (4):T889-T906.
    Understanding the structure of the pore throat is an important task for tight reservoir development. The common methods of studying the pore-throat structure include pressure-controlled mercury injection, rate-controlled mercury injection, X-ray computer tomography, and scanning electron microscopy. We have used those four methods to understand the pore-throat structures of three main lithologies in the Lucaogou Formation, Jimsar Sag, China. The PMI results revealed that the pore-throat size of all of the lithologies ranges from 0.013 to [Formula: see text]. The RMI (...)
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  • Pore-Throat Structures and Their Control of Terrestrial Lacustrine Tight Reservoir Quality: The Permian Lucaogou Formation, Jimsar Sag, Northwestern China.Ke Ma, Jiagen Hou, Lin Yan & Fuli Chen - 2018 - Interpretation 6 (4):T889-T906.
    Understanding the structure of the pore throat is an important task for tight reservoir development. The common methods of studying the pore-throat structure include pressure-controlled mercury injection, rate-controlled mercury injection, X-ray computer tomography, and scanning electron microscopy. We have used those four methods to understand the pore-throat structures of three main lithologies in the Lucaogou Formation, Jimsar Sag, China. The PMI results revealed that the pore-throat size of all of the lithologies ranges from 0.013 to [Formula: see text]. The RMI (...)
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