A method of classification of shale set

Key words:  shale  four-component and three-terminal element  the volume fraction of organic matter  three-level named  the second Member of Funing Formation

Abstract:

The composition of shale formation is complicated, and the lithofacies classification schemes are not unified. Using core observation, microscopic identification, whole rock analysis and organic geochemical data analysis, a comprehensive shale set lithofacies classification scheme, which is based on the principle of “four-component and three-terminal element”, was established by adopting a method of combining macro structures of cores, organic content with rock types. The classification scheme introduces the organic matter content, and reflects the structural characteristics, mixed sedimentary characteristics of shale formations as well as its practicability. This classification scheme has been effectively applied to the study of lithofacies classification of shale set in the second Member of Funing Formation, Subei Basin, and may form a solid basis for the future shale reservoir space research, logging lithofacies identification and reservoir reconstruction evaluation.