| Imaging-Based Characterization of Perthite in the Upper
Triassic Yanchang Formation Tight Sandstone of the
Ordos Basin, China |
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| 作者姓名： | DU Shuheng SHI Guoxin YUE Xinjian KOU Gen ZHOU Bo SHI Yongmin |
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| 作者单位： | 1 State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
2 Key Laboratory of Petroleum Resources Research，Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029，China,3 Xinjiang Laboratory of Petroleum Reserve in Conglomerate, Karamay 834000, Xinjiang, China
4 Research Institute of Experiment and Detection of PetroChina Xinjiang Oilfield Company, Karamay, 834000, Xinjiang, China,3 Xinjiang Laboratory of Petroleum Reserve in Conglomerate, Karamay 834000, Xinjiang, China
4 Research Institute of Experiment and Detection of PetroChina Xinjiang Oilfield Company, Karamay, 834000, Xinjiang, China,3 Xinjiang Laboratory of Petroleum Reserve in Conglomerate, Karamay 834000, Xinjiang, China
4 Research Institute of Experiment and Detection of PetroChina Xinjiang Oilfield Company, Karamay, 834000, Xinjiang, China,3 Xinjiang Laboratory of Petroleum Reserve in Conglomerate, Karamay 834000, Xinjiang, China
4 Research Institute of Experiment and Detection of PetroChina Xinjiang Oilfield Company, Karamay, 834000, Xinjiang, China and 5 Oil and Gas Institute, Peking University, Beijing 100871, China |
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| 基金项目： | This work was funded by open fund of Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics,Chinese Academy of Sciences;the National Science and Technology Project of China;Thanks are given to Gao Xiaoli,Jin Xiangtian and Chai Guangsheng for their help in this study |
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| 摘 要： |
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| 收稿时间： | 2018/8/11 0:00:00 |
| 修稿时间： | 2018/10/27 0:00:00 |
Imaging-Based Characterization of Perthite in the Upper Triassic Yanchang Formation Tight Sandstone of the Ordos Basin,China |
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| Authors: | DU Shuheng SHI Guoxin YUE Xinjian KOU Gen ZHOU Bo and SHI Yongmin |
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| Abstract: | This work investigated the element distribution of perthite from the Upper Triassic Yanchang Formation tight sandstone in the Ordos Basin of northern China by field emission scanning electron microscopy(FE-SEM) and energy dispersive spectrometer(EDS). FE-SEM results indicate significant differences in the morphology of Na-rich feldspar when K-rich feldspar is the main component of the perthite. EDS results show that different types of perthite have clearly defined differences on different element indexes. Additionally, indexes such as average-weight-K(K-rich)/Na(Na-rich), maximumweight-K(Na-rich)/Na(Na-rich) and average-atomic-K(K-rich)/Na(Na-rich) might be the most effective ones to identify perthite types. Perthite is divided into six main types, i.e., perthite with thick parallel stripe distribution, with thin parallel stripe distribution, with lumpy stripe distribution, with dendritic stripe distribution, with encircling stripe distribution, and with mixed stripe distribution. |
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| Keywords: | petrography perthite element distribution EDS FE-SEM image processing Yanchang Formation Late Triassic Ordos Basin |
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