双河油田核三段砂岩储集层的孔隙演化研究

根据储层岩石的铸片及扫描电镜观察 ,双河油田核三段砂岩在整个成岩演化过程中 ,孔隙得到了不同程度的改造。沉积物通过机械压实、不稳定组分蚀变、碳酸盐胶结和交代、石英次生加大及脱碳酸盐化等一系列的成岩变化 ,经历了由原生孔隙损失到次生孔隙形成的演化 ,形成了大量的次生孔隙和有效的储集空间体系

Research on pore evolution of the Paleogene sandstone reservoir in the Shuanghe oil field

Based on the observation of the casting slices of reservoir rocks under the scanning electron microscope , the authors find that the original pore structure of Paleogene sandstone in the Shuanghe oilfield changed a lot in the diagenetic process. In the process of physical compaction, instable components alteration, carbonates cementation and replacement, the sediments went through the evolution from losing original pores to gaining secondary pores. As a result, a large amount of pores space favorable to the oil and gas storage formed.