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

SONG Mingshui,LIU Huimin,WANG Yong,LIU Yali

Table 1 Geochemical characteristics of main shale oil pays worldwide.

Area Formation Sedimentary environment Kerogen type TOC/% Ro/% Density/(g·cm-3) Western Gulf Eagle Ford Marine Ⅰ 3.0-10.0 0.7-1.3 0.82-0.87 Permian Wolfcamp Marine Ⅰ and Ⅱ 2.0-6.0 0.7-1.0 0.70-0.81 Anadarko Woodford Marine Ⅱ 1.0-14.0 1.1-3.0 Jimsar Lucaogou Marine Ⅰ and Ⅱ 3.0-4.0 0.6-1.5 0.88-0.93 Ordos Yanchang Marine Ⅱ1 2.0-20.0 0.7-1.2 0.80-0.86 Cangdong Sag Ek2 Marine Ⅰand Ⅱ 1.9-5.4 0.7-1.0 0.87-0.91 Jiyang Depression Es3 Lacustrine Ⅰ 0.6-10.3 0.4-1.0 0.80-0.93 Jiyang Depression Es4 Lacustrine Ⅰ 0.6-16.7 0.4-1.1 0.77-0.91