Application of Well Logging Technology to High Abundance Hydrocarbon Source Rock Evaluation in the 1st Member of Qingshankou Formation in the Southern Songliao Basin

By taking 13 exploration wells for successive hydrocarbon source rock samples in Southern Songliao Basin as criterion wells,the relationship between the measured value of TOC and ΔlogR was established by using ΔlogR method,the value of TOC of surrounding exploration wells was predicted.The result shows that the correlation between the obtained TOC value and the value of geochemical data is good,the correlation coefficients are 81.15 % in thick hydrocarbon source rock and 95.39% in sandstone and mudstone thin interbed respectively.Based on the domestic and abroad research results and the relationship between IH and TOC in the 1st member of Qingshankou Formation,the content of TOC above 2% is considered as high abundance hydrocarbon source rock,the vertical distribution of high abundance hydrocarbon source rock is analyzed.The high Therefore high abundance hydrocarbon source rock has higher contribution than the source rock with medium-low abundance hydrocarbon.The distinction of high abundant hydrocarbon source rock is the basis of precise hydrocarbon resource evaluation.