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| 蒙脱石伊利石化对含油气盆地地层压力影响的定量研究 | |
| 引用本文： | 陆现彩,刘庆,张林晔,李迎辉,周睿,陆建军.蒙脱石伊利石化对含油气盆地地层压力影响的定量研究[J].矿物岩石地球化学通报,2004,23(4):285-291. |
| 作者姓名： | 陆现彩 刘庆 张林晔 李迎辉 周睿 陆建军 |
| 作者单位： | 1. 南京大学,地球科学系,内生金属矿床成矿机制国家重点实验室,南京,210093 2. 胜利油田,地质研究院,山东,东营,257125;成都理工大学,资源学院,成都,610095 3. 胜利油田,地质研究院,山东,东营,257125 |
| 基金项目： | 国家自然科学基金(40003002，40373024)，南京大学开放测试基金(0706001316)资助项目 |
| 摘 要： | 异常高压带是含油气系统研究和资源勘探领域的热点之一。本文以东营凹陷为例，定量研究了牯土矿物成岩作用对地层压力聚集的贡献。在系统分析粘土矿物组成、成岩物理化学条件的基础上，模拟计算了蒙脱石伊利石化的动力学过程，计算了脱水造成的体积变化和硅钙释放量。指出脱水作用造成的体积变化不是形成异常高压的重要因素，但硅钙的释放可能对封隔层的形成起着非常关键的作用，对地层异常压力的积聚和保持有重要贡献。 |
| 关 键 词： | 伊利石 含油气盆地 物理化学条件 成岩作用 脱水作用 蒙脱石 矿物 定量研究 影响 体积变化 |
| 文章编号： | 1007-2802(2004)04-0285-07 |
| 修稿时间： | 2004年4月30日 |
Evaluation of the Contribution of Illitization of Smectite to the Geopressure in Oil-Bearing Basin |
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| LU Xian-cai,LIU Qing.Evaluation of the Contribution of Illitization of Smectite to the Geopressure in Oil-Bearing Basin[J].Bulletin of Mineralogy Petrology and Geochemistry,2004,23(4):285-291. | |
| Authors: | LU Xian-cai LIU Qing |
| Institution: | LU Xian-cai~1,LIU Qing~ |
| Abstract: | Overpressure is an important issue in the research and exploration of petroleum system. Based on the case study of Dongying Basin, we evaluated quantitatively the contribution of illitization of smectite to the geopressure during diagensis processes. Clay component and physical-chemical parameters of digenesis were analysed using XRD and basin modeling,respectively, and the results are used in the dynamic chemical simulation of illitization processes. Furthermore, the volume increase due to dehydration and release of Si, Ca attributed to illitization were calculated by integrating relative geological information. According to the obtained results, it is suggested that the expanding of water in smectite because of dehydration does not contribute to the increase in geopressure significatively, and that the release of Ca and Si plays an important role in the overpressure seals, which is of great significance for the accumulation of overpressre in Dongying Basin. |
| Keywords: | overpressure clay minerals dynamic simulation illitization pressure seal |
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