Formation conditions of Neogene large-scale high-abundance lithologic reservoir in the Laibei low uplift, Bohai Sea, East China

XU Changgui,YANG Haifeng,WANG Deying,ZHAO Dijiang,WANG Liliang

Table 1 Evaluation of hydrocarbon source rocks in the Huanghekou and Laizhouwan sags.

Sag Formation Content of organic carbon/% Hydrocarbon generation potential/(mg·g-1) Types of organic matter Evaluation Huanghekou E3d3 $\frac{0.63-1.62}{1.13(15)}$ $\frac{7.60-25-46}{9.41(15)}$ II1—II2 Good-excellent E3s1, E3s2 $\frac{0.11-2.67}{0.88(22)}$ $\frac{0.01-15.63}{4.67(13)}$ II1—II2 Medium-good E2s3 $\frac{0.33-9.19}{2.64(33)}$ $\frac{0.61-68-90}{14-41(28)}$ II1—II2 Good-excellent Laizhouwan E2s3 $\frac{0.53-12.8}{2.29(23)}$ $\frac{0.64-66-1}{9.84(18)}$ II1—III Good-excellent E2s4 $\frac{0.83-5.09}{2.66(15)}$ $\frac{2-93-36-24}{14-80(12)}$ II1—II2 Good-excellent