| Control Factors of Solutional Voids in Feldspars and Favorable Zone Forecast of Chang 2 Oil Reservoir Group in the Midwest Ordos Basin |
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| 作者姓名： | GUO Shaobin ZHAO Pengda |
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| 作者单位： | [1]School of Energy Resources, China University of Geosciences, Beijing 100083, China [2]China University of Geosciences, Wuhan 430074, China [3]China University of Geosciences, Beijing 100083, China |
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| 基金项目： | Acknowledgments This research has acquired financial support from the Changqing 0ilfield Branch Company of the China National Petroleum Corporation. Dujia offered great help in data statistics and drawing charts, and the authors have attained inspiration and elucidation from their predecessors and express thanks to all concerned. |
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| 摘 要： | The development of pores in a clastic reservoir is one of the most important research subjects in oil-gas exploration and development,whereas the many reasons for the formation of secondary porosity have increased the degree of difficulty in such research.Thus the research aims are to discover the controlling factors of solutional voids in feldspars and to predict favorable regions for these voids. Macroscopic and systematic researches into the relationship between the kaolinite content in the feldspar solutional void developed area of the Chang 2 reservoir group of the Triassic Yanchang Formation in the Midwest Ordos Basin and the solutional void in feldspar have been made,and from this it can be determined that the kaolinite content has an indicative function to the distribution of the solutional void in feldspar.Solutional void in feldspar is relatively well developed at the area where kaolinite content is high.Although the factors affecting kaolinite content are complicated,yet that of the research area is mainly affected by the impact of the leaching atmospheric water acting on the palaeogeomorphology.Three favorable zone belts for the development of solutional voids in feldspars are forecasted on the basis of restoration of palaeogeomorphology.
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| 关 键 词： | 鄂尔多斯盆地 高岭石 长石 中国 |
| 修稿时间： | 5/9/2006 12:00:00 AM |
Control Factors of Solutional Voids in Feldspars and Favorable Zone Forecast of Chang 2 Oil Reservoir Group in the Midwest Ordos Basin |
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| Authors: | GUO Shaobin ZHAO Pengda |
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| Abstract: | The development of pores in a clastic reservoir is one of the most important research subjects in oil-gas exploration and development, whereas the many reasons for the formation of secondary porosity have increased the degree of difficulty in such research. Thus the research aims are to discover the controlling factors of solutional voids in feldspars and to predict favorable regions for these voids. Macroscopic and systematic researches into the relationship between the kaolinite content in the feldspar solutional void developed area of the Chang 2 reservoir group of the Triassic Yanchang Formation in the Midwest Ordos Basin and the solutional void in feldspar have been made, and from this it can be determined that the kaolinite content has an indicative function to the distribution of the solutional void in feldspar. Solutional void in feldspar is relatively well developed at the area where kaolinite content is high. Although the factors affecting kaolinite content are complicated, yet that of the research area is mainly affected by the impact of the leaching atmospheric water acting on the palaeogeomorphology. Three favorable zone belts for the development of solutional voids in feldspars are forecasted on the basis of restoration of palaeogeomorphology. |
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| Keywords: | Ordos Basin Chang 2 reservoir group kaolinite solutional voids feldspar west China |
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