电子探针对储集层中长石、石英成岩演变特征的研究

ELECTRON PROBE ANALYSIS ON THE DIAGENETIC CHARACTERISTICS FELDSPAR AND QUARTZ

方伟 薛中州

Fang wei Xue Zhongzhou

石油工业部大庆石油勘探开发研究院

Daqing Research Institute of Petroleum Exploration and Development, Ministry of Petroleum Industry

本文根据储集层研究特点,对电子探针仪进行了功能开发和技术改造,建立了电子探针研究储层中长石、石英成岩演变特征的方法。研究表明,储层中的次生孔隙带主要是由钾长石溶蚀形成的。长石、石英次生加大边的微量元素含量能在一定程度上反映出成岩过程中孔隙流体的化学条件,并可作为划分成岩阶段的辅助手段,为储集层的深入研究提供了新的线索和途径。

Based on the properties of reservoir rocks, the authors of this paper advance the methodology of the study on the diagenesis of feldspar and quartz in reservoir rocks with developed functions using reformed electron probe. It is revealed that secondary porosity of reservoir rocks are mainly resulted from potash feldspar dissolution. The microelement content of the secondary enlargement margin of the the feldspar and quartz, somehow, would reflect the chemical conditions of the pore fluids during diagenesis. Therefore, it can be used as an auxiliary tool to classify diagenetic stages, and it will provide leads and explore avenues for the further studies on reservolr rocks.

https://doi.org/10.11781/sysydz198803241