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  1.  28
    Factors Controlling Organic Matter Enrichment in the Lower Cambrian Niutitang Formation Shale on the Eastern Shelf Margin of the Yangtze Block, China.Xianglu Tang, Zhenxue Jiang, Zhuo Li, Lijun Cheng, Ye Zhang, Panke Sun & Chunyan Fan - 2017 - Interpretation: SEG 5 (3):T399-T410.
    The degree of organic matter enrichment in shale determines its oil and gas potential. To understand the factors controlling this OM enrichment, we have used petrological and geochemical analyses to study the Lower Cambrian Niutitang Formation Shale in the eastern shelf margin of the Yangtze Block. Our results reveal that the total organic carbon content of the Niutitang Formation Shale varies significantly throughout the vertical section. The lower part of the Niutitang Formation has a high TOC content, likely due to (...)
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  2.  17
    Pore Characteristics and Dominant Controlling Factors of Overmature Shales: A Case Study of the Wangyinpu and Guanyintang Formations in the Jiangxi Xiuwu Basin.Fenglin Gao, Yan Song, Zhuo Li, Zhenxue Jiang, Zhiye Gao, Xinxin Zhang, Lei Chen & Qingxin Liu - 2018 - Interpretation: SEG 6 (2):T393-T412.
    Because of the great potential for hydrocarbon generation, the Lower Cambrian Wangyinpu and Guanyintang Formations of the Jiangxi Xiuwu Basin have become the most important targets for shale-gas exploration in the Jiangxi province. We investigate the pore characteristics and main controlling factors of overmature shale using field emission-scanning electron microscopy, image-processing software, X-ray diffraction, and gas-adsorption experiments. The results show that the shales have a high abundance of organic matter, over maturity, and highly siliceous mineral content. The kerogen type is (...)
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  3.  18
    Pore Characteristics and Dominant Controlling Factors of Overmature Shales: A Case Study of the Wangyinpu and Guanyintang Formations in the Jiangxi Xiuwu Basin.Fenglin Gao, Yan Song, Zhuo Li, Zhenxue Jiang, Zhiye Gao, Xinxin Zhang, Lei Chen & Qingxin Liu - 2018 - Interpretation 6 (2):T393-T412.
    Because of the great potential for hydrocarbon generation, the Lower Cambrian Wangyinpu and Guanyintang Formations of the Jiangxi Xiuwu Basin have become the most important targets for shale-gas exploration in the Jiangxi province. We investigate the pore characteristics and main controlling factors of overmature shale using field emission-scanning electron microscopy, image-processing software, X-ray diffraction, and gas-adsorption experiments. The results show that the shales have a high abundance of organic matter, over maturity, and highly siliceous mineral content. The kerogen type is (...)
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  4.  25
    Characterization and Origin of the Silurian Wufeng-Longmaxi Formation Shale Multiscale Heterogeneity in Southeastern Sichuan Basin, China.Zhenxue Jiang, Xianglu Tang, Lijun Cheng, Zhuo Li, Yingying Zhang, Yongqiang Bai, Yuan Yuan & Jin Hao - 2015 - Interpretation: SEG 3 (2):SJ61-SJ74.
    Shale heterogeneity is important for micro- to macroscale-quality reservoir prediction. We evaluated the multiscale heterogeneity in shale based on thin-section observation, field emission scanning electron microscope observation, low-pressure [Formula: see text] adsorption analysis, mercury intrusion porosimetry, organic carbon analysis, and bulk chemical analysis by X-ray powder diffraction. We evaluated the results in which the heterogeneity of minerals and organic matter in shale was shown by disorderly and unsystematically distributed mineral grains, lamina, and rapid lithology at multiple scales. The random arrangement (...)
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  5.  15
    Relationship Between Pore Characteristics and Occurrence State of Shale Gas: A Case Study of Lower Silurian Longmaxi Shale in the Upper Yangtze Platform, South China.Lei Chen, Zhenxue Jiang, Keyu Liu, Pengfei Wang, Yu Liu, He Bi, Fenglin Gao, Chen Zhang & Wenming Ji - 2017 - Interpretation: SEG 5 (3):T437-T449.
    We have used focused ion beam-helium ion microscopy and low-pressure [Formula: see text] adsorption to investigate the pore characteristics of Lower Silurian Longmaxi shale. These results, combined with the molecular potential energy theory, reveal the relationship between pore size and the occurrence state of shale gas. Our results reveal that the pore volume and the specific surface area of Lower Silurian Longmaxi shale are mainly contributed by the pores with diameters of less than 10 nm. Nanoscale organic-matter pores are predominant, (...)
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  6.  7
    Characteristics and Origin of the Pore Structure of the Lacustrine Tight Oil Reservoir in the Northwestern Jiuquan Basin, China.Chunyan Fan, Xianglu Tang, Yuanyin Zhang, Yan Song, Zhenxue Jiang, Qun Luo & Baiying Li - 2019 - Interpretation 7 (3):T625-T636.
    The pore structure controls the formation processes of tight oil reservoirs. It is meaningful to study the characteristics and origin of the pore structure of the tight oil reservoir. We have analyzed the pore structure of the tight oil reservoir by thin sections, scanning electron microscopy, and mercury intrusion porosimetry. We analyze the origin of the pore structure based on sedimentological, diagenetic, and tectonism processes. The porosity of the tight oil reservoirs is mainly approximately 2%–10%, and the permeability is mainly (...)
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  7.  4
    Effect of Laminae Development on Pore Structure in the Lower Third Member of the Shahejie Shale, Zhanhua Sag, Eastern China.Tingwei Li, Zhenxue Jiang, Pibo Su, Xi Zhang, Weitao Chen, Xiaoyan Wang, Chuanxiang Ning, Zhi Wang & Zixin Xue - 2020 - Interpretation 8 (1):T103-T114.
    Similar to mineral composition and organic geochemical features, laminae development significantly influences pore structure. Taking the lower third member of the Shahejie Shale, Zhanhua Sag, Eastern China as the research object, we introduced various methods to analyze the influence of laminae development on pore structure, including thin section observations, field emission scanning electron microscopy, gas adsorption, high-pressure mercury injection, nano-computed tomography, quantitative evaluation of minerals by scanning electron microscopy, and spontaneous imbibition. We draw the conclusions that various minerals present a (...)
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  8.  54
    Effect of Sedimentary Environment on Shale Lithofacies in the Lower Third Member of the Shahejie Formation, Zhanhua Sag, Eastern China.Tingwei Li, Zhenxue Jiang, Chenlu Xu, Yuan Yuan, Pengfei Wang, Guoheng Liu, Bo Zhang, Chuanxiang Ning & Zhi Wang - 2017 - Interpretation: SEG 5 (4):T487-T501.
    Research on shale lithofacies is important for shale oil and gas production. This study focused on the lower third member of the Shahejie Formation in the Luo-69 well in the Zhanhua Sag, Jiyang Depression, Bohai Bay Basin, eastern China. Several methods, including thin section observations, total organic carbon analysis, X-ray diffraction analysis, quantitative evaluations of minerals by scanning electron microscopy, major and trace-element analyses, and field emission-scanning electron microscopy, are used to investigate the effect of sedimentary environment on the type (...)
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  9.  30
    Porosity Evolution Mechanisms of Marine Shales at Over-Maturity Stage: Insight From Comparable Analysis Between Lower Cambrian and Lower Silurian Inside and at the Margin of the Sichuan Basin, South China.Xin Li, Zhenxue Jiang, Yan Song, Gangyi Zhai, Shujing Bao, Zhuo Li, Xianglu Tang, Pengfei Wang, Tingwei Li, Guozhen Wang, Wen Zhou, Hengyuan Qiu & Yanan Miao - 2018 - Interpretation 6 (3):T739-T757.
    To figure out porosity evolution mechanisms of marine shales inside and at the margin of the Sichuan Basin, South China, we measured samples selected from Lower Cambrian Qiongzhusi shales and Lower Silurian Longmaxi shales by a combination of X-ray diffraction, geochemistry measurement, focused ion beam milling and scanning electron microscopy imaging, and [Formula: see text] adsorption. It was suggested that shales of the upper Qiongzhusi Formation and the Longmaxi Formation possessed larger pore volumes and larger pore surface areas than those (...)
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  10.  12
    Porosity Evolution Mechanisms of Marine Shales at Over-Maturity Stage: Insight From Comparable Analysis Between Lower Cambrian and Lower Silurian Inside and at the Margin of the Sichuan Basin, South China.Xin Li, Zhenxue Jiang, Yan Song, Gangyi Zhai, Shujing Bao, Zhuo Li, Xianglu Tang, Pengfei Wang, Tingwei Li, Guozhen Wang, Wen Zhou, Hengyuan Qiu & Yanan Miao - 2018 - Interpretation: SEG 6 (3):T739-T757.
    To figure out porosity evolution mechanisms of marine shales inside and at the margin of the Sichuan Basin, South China, we measured samples selected from Lower Cambrian Qiongzhusi shales and Lower Silurian Longmaxi shales by a combination of X-ray diffraction, geochemistry measurement, focused ion beam milling and scanning electron microscopy imaging, and [Formula: see text] adsorption. It was suggested that shales of the upper Qiongzhusi Formation and the Longmaxi Formation possessed larger pore volumes and larger pore surface areas than those (...)
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  11.  17
    The Characteristics of Tight Oil Sand Reservoir-Source Assemblage in Lacustrine Basins: A Case Study of the Cretaceous Qingshankou Formation, Songliao Basin, Northeast China.Yaohua Li, Yan Song, Zhenxue Jiang, Lishi Yin, Mo Chen, Pengyan Wang, Dan Liu & Yunjin Ge - 2018 - Interpretation 6 (2):T299-T311.
    The complicated source-reservoir-assemblage characteristics of lacustrine tight oil sand in China are the main controlling factors of tight reservoir oiliness. Several studies have focused on qualitative description of source-reservoir-assemblage characteristics without quantitative assessment. In this study, reservoir-source-assemblage has been evaluated quantitatively by fitting the RSA log in the evaluation of Qijia Depression in the Songliao Basin. Total organic carbon and sand volume logs are used to fit the RSA log in three steps: TOC and Vs log fitting and normalization, RSA (...)
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  12.  16
    The Characteristics of Tight Oil Sand Reservoir-Source Assemblage in Lacustrine Basins: A Case Study of the Cretaceous Qingshankou Formation, Songliao Basin, Northeast China.Yaohua Li, Yan Song, Zhenxue Jiang, Lishi Yin, Mo Chen, Pengyan Wang, Dan Liu & Yunjin Ge - 2018 - Interpretation: SEG 6 (2):T299-T311.
    The complicated source-reservoir-assemblage characteristics of lacustrine tight oil sand in China are the main controlling factors of tight reservoir oiliness. Several studies have focused on qualitative description of source-reservoir-assemblage characteristics without quantitative assessment. In this study, reservoir-source-assemblage has been evaluated quantitatively by fitting the RSA log in the evaluation of Qijia Depression in the Songliao Basin. Total organic carbon and sand volume logs are used to fit the RSA log in three steps: TOC and Vs log fitting and normalization, RSA (...)
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  13.  12
    A New Method for Continental Shale Oil Enrichment Evaluation.Siyuan Su, Zhenxue Jiang, Zhiye Gao, Chuanxiang Ning, Zhi Wang, Zheng Li & Rifang Zhu - 2017 - Interpretation: SEG 5 (2):T209-T217.
    We have evaluated continental shale oil enrichment via experiments. Rock pyrolysis, nuclear magnetic resonance, and pulse permeability tests were conducted to establish the pore saturation index, which comprehensively evaluates the enrichment of shale oil features using the characteristics of self-generation and self-preservation, the parameters of which include the pyrolysis-free hydrocarbon and total organic carbon of source rocks as well as the porosity and permeability of reservoir rocks. The correlation of the oil content and PSI values indicated that PSI values greater (...)
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  14.  23
    Whole-Aperture Characteristics and Controlling Factors of Pore Structure in the Chang 7th Continental Shale of the Upper Triassic Yanchang Formation in the Southeastern Ordos Basin, China.Wei Yang, Yan Song, Zhenxue Jiang, Qun Luo, Qianyou Wang, Yuan Yuan, Chen Zhang & Lei Chen - 2018 - Interpretation: SEG 6 (1):T175-T190.
    Quantitative assessment is still lacking on the pore-sizes distribution of micropores and mesopores, and the major controlling factors remain enigmatic for the continental Chang 7th shale reservoirs in southeastern Ordos Basin. In this study, scanning electron microscopy, organic geochemical analysis, low-temperature gas adsorption, high-pressure mercury injection, and X-ray diffraction analysis were conducted on 29 core samples from representative eight wells in the Xiasiwan-Yanchang area, yielding a particular investigation on characteristics and controlling factors of the structure in the Chang 7th shale. (...)
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