华北北部地区蓟县系高于庄组-雾迷山组白云岩储层特征与形成主控因素

李朋威, 何治亮, 罗平, 金廷福, 张英, 冯建赟, 宋金民, 徐士林

Characteristics of and main factors controlling the dolomite reservoir of Gaoyuzhuang-Wumishan Formations in the Jixian System, the north of North China

Pengwei Li, Zhiliang He, Ping Luo, Tingfu Jin, Ying Zhang, Jianyun Feng, Jinmin Song, Shilin Xu

图3 天津蓟县地区蓟县系高于庄组-雾迷山组白云岩微观特征 a.亮暗相间纹层，暗色纹层较厚，为0.2~0.5 mm，亮色纹层一般小于0.3 mm,叠层石白云岩，Jxw；b.由连续叠置生长的暗层和亮层组成，纹层宽0.01~0.1 mm不等，层纹石，Jxg；c.似球粒泥晶结构，大小较均匀，呈圆或椭圆状，色暗富含有机质，Jxw；d.凝块结构，凝块多为斑状或不规则状，亮晶胶结,凝块石白云岩，Jxw；e.残余凝块结构，凝块边缘较为模糊，亮晶胶结,残余凝块石白云岩，Jxw；f.核形石结构，具同心圈层，其直径一般大于2 mm,核形石白云岩，Jxw；g.纹层状泥晶白云岩，纹层不甚发育，近水平状，Jxw；h.砂砾屑白云岩，亮晶胶结，Jxw；i.残余凝块细-中晶白云岩，白云石以它型为主，可见锯齿状压溶缝，Jxw

Fig.3 Microscopic features of the Gaoyuzhuang-Wumishan dolomites in the Jixian System of Jixian County, Tianjin