石英胶结作用化学动力学模型及应用

KINETIC MODEL OF QUARTZ CEMENTATION AND ITS APPLICATION

杨俊生 孟元林 张洪 李国会

YANG Junsheng MENG Yuanlin ZHANG Hong LI Guohui

中国地质大学, 北京, 100083 2. 中国石油, 大庆石油管理局, 勘探开发研究院, 黑龙江, 大庆, 163712

China University of Geosciences, Beijing 100083, China 2. Research Institute of Petroleum Exploration and Development, Daqing Petroleum Administration, Daqing, Heilongjiang 163712, China

石英(硅质)胶结作用是储层成岩作用中的重要类型,目前常根据镜下观察获得的石英加大级别确定储层所处的成岩阶段。该文综合考虑温度、时间、石英颗粒含量、粒径和粘土包壳对自生石英形成的影响,建立了石英胶结作用的化学动力学模型。该模型可以模拟碎屑岩储层成岩作用过程中任一时刻石英胶结物的含量及由此而引起的孔隙损失,这对于成岩作用的定量化研究及储层描述均具有重要意义。最后,以松辽盆地大庆油田汪家屯地区为例对这一模型进行了应用。

Quartz cementation is one of the most important diagenetic process. The quartz overgrowth order obtained from observation of thin section often used to determine the diagenetic stage of reservoir rocks. In this article, we established a kinetic model of quartz cementation, in which temperature history, reaction time, detrital mineralogy, grain size and grain coating abundance were all considered. The model can be used to simulate the volume percentage of quartz cementation and the porosity loss during the diagenetic process of siliciclastic reservoir rocks. This has great significance for quantitative study of diagenesis and reservoir description. At last, the kinetic modeling of quartz cementation was successfully applied to the study of reservoirs in Wangjiatun area of Daqing oilfield.

中国石油“九五”科技攻关项目(970206-02-01)

https://doi.org/10.11781/sysydz200204372