摘要
通过对临南洼陷沙三段储层样品的系统分析,探讨了不同含油级别样品中成岩矿物的分布特征,建立了含油饱和度和次生孔隙度的定量关系。研究发现,油气充注可能会引起储层成岩环境的变化,能抑制石英和伊利石的胶结作用,加剧碳酸盐矿物的溶蚀作用,缓冲压实作用。当含油级别低于或等于油浸(So=16.93%～19.65%)时,次生孔隙度随含油级别增加而增加,从油浸到富含油级别(So>19.65%)时,次生孔隙度略有降低。
By analyzing the reservoir samples of Es3 in I.innan subsag, the paper discussed the distribution characteristics of diagenesis minerals in samples with different oil-bearing grades, and established a quantitative relationship between the oil saturation and the secondary porosity. The study indicates that hydrocarbon charging process may change the diagenetic environment of reservoirs, which means restraining the cementation of quartz and illite, improving the corrosion of carbonate minerals, and buffering the consolidation. In addition, the secondary porosity increases with increasing the oil-bearing grade when the latter is below or equal to oil immersion（So= 16.9%- 19.65%）, while the former decreases slightly when the latter rises from immersion to oil-rich level（So〉lg. 65~）.
出处
《山东科技大学学报（自然科学版）》
CAS
2013年第1期26-31,共6页
Journal of Shandong University of Science and Technology(Natural Science)
基金
山东省高校科研计划项目(J09LE08)
关键词
临南洼陷
油气充注
成岩演化
含油级别
次生孔隙
Linnan subsag
hydrocarbon charging
diagenesis
oil hearing grade
secondary porosity
