Abstract
Source rock heterogeneity is a common and important feature that requires attention in shale oil resource evaluation. The Eocene-Oligocene Shahejie Formation in the Jiyang Superbasin, Bohai Bay Basin, has been studied to investigate vertical variations in source rock characteristics and their thermal decomposition behaviors in relation to lacustrine shale oil resource potential. Fifty-four core samples from Luo 69 Well were analyzed using Rock-Eval 6 equipment, and the resulting FID (flame ionization detector) hydrocarbon pyrograms were examined to study their generation kinetics. Differences in bulk geochemical characteristics, petroleum generation capacities, and petrophysical properties allow for subdivision of the samples into three “homogeneous” groups: (a) a stratigraphically higher facies, corresponding to samples with HI value around 600 mg HC/g TOC and high S1/TOC (due to either exogenous hydrocarbon input or thermally less stable kerogen, or both); (b) stratigraphically a facies in the middle of...
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