Abstract:

Oil shale in the Lower Cretaceous in the Yin’e basin occurs in the second and third members of the Bayingebi Formation. By using borehole core and analysis data, the physics, quality, geochemistry, organic geochemistry and distribution of the oil shale from Bayingebi Formation have been studied, and the sedimentary environment, yield power of palaolake, tectonic and paleoclimate of the oil shale also have been studied. The study results indicate that the oil shale from Bayingebi Formation is of low oil-bearing rate, middle volatilization and low generate heat. Oil shale may be divided into four oil layers. The main oil layer shale were developed during highstand system tract. The genetic type of the oil shale are sapropelic and humus type of deep lake. The concentration of the oil shale was controlled by tectonic evolution, sedimentary environment, paleoclimate and paleo-topograph.

Key words: Yin’e basin, Bayingebi Formation, oil shale, paleoenvironment