Enrichment rules and exploration practices of Paleogene shale oil in Jiyang Depression, Bohai Bay Basin, China

SONG Mingshui,LIU Huimin,WANG Yong,LIU Yali

Fig. 4. Microscopic features of thin interlayer. (a) Well-L69, 3 055.60 m, asphalt in calcite dissolution pore, plane polarized light; (b) Well-L69, 3 132.65 m, rich intercrystalline pores in dolomite, scanning electron microscope; (c) Well-JYC1, 3 370.80 m, intergranular pores in clastic rock, filled with clay minerals, scanning electron microscope; (d) Well-JYC1, 3 580.40-3 581.40 m, fine sandstone giving off blue fluorescence, argillaceous siltstone yellow fluorescence, shale no obvious fluorescence, white fluorescent illumination; (e) Well- JYC1, 3 580.40-3 581.40 m, core sample.