Analysis on Log Response Characteristics of Oil Shale and In-situ Mining Geological Evaluation in Qingshankou Formation of South of Songliao Basin

Abstract

Abstract In order to study the log response characteristics of oil shale in Qingshankou formation of the south of Songliao basin, the geology of in-situ mining of oil shale in this area is preliminarily evaluated, so as to provide scientific basis for in-situ mining of oil shale in this area. Based on the log response principle of oil shale, the Qingshankou formation oil shale in this area is identified qualitatively, and the in-situ geological parameters of oil shale are analyzed in combination with the characteristics of oil shale. The results show that the oil shale of Qingshankou formation in the south of Songliao basin is with the log response characteristics of high natural gamma, high resistivity, high acoustic time difference, and low density, and the organic carbon owns the best correlation with resistivity and density logs. Through analysis of the geological parameters affecting in-situ oil shale mining, the geological parameters affecting in-situ oil shale mining include oil content, thickness, burial depth, mineral type and its content, organic matter type and its maturity, water content, sulfur content, rock assemblage characteristics, ore body distribution characteristics, and dip distribution characteristics, etc.