| 海拉尔盆地贝尔凹陷兴安岭群储层粘土矿物组成及特征研究 |
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| 关键词:Hingganling Group clay Na+montmorillonite formation damage |
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| Composition and Characteristics of Clay Minerals from the Hingganling Group in the Beier Depression of the Hailar Basin |
| Geological conditions of Hailaer Basin are very complex. It is difficult to develop its oil reservoirs because of high content of clay minerals. Using X-ray diffraction analysis and SEM observation, the authors studied the form, content, combination and vertical distribution of clay minerals from Hingganling Group, and also probed into the genesis of these clay minerals. The result shows that compositionally there are three types of clay minerals from top to bottom in Hingganling Group: S+K+(C)→K+I/S+I+(C)→I+C+S/C+I/S. With the increasing depth, the content of clay minerals decreases gradually. It is thought that hydrolysis of tuffaceous material and secondary alteration of feldspars and rock debris are two main factors responsible for the high content of clay minerals. |
| FU Zheng,LIU Qin-fu,TIAN Wei-meng,HOU Li-hua.2008.Composition and Characteristics of Clay Minerals from the Hingganling Group in the Beier Depression of the Hailar Basin[J].Acta Geoscientica Sinica,29(2):174-178. |
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