Key methods and technologies in the study of oil shale mineralization
Liu Zhao-Jun1,2, Meng Qing-Tao1,2, Jia Jian-Liang3
1 College of Earth Sciences,Jilin University,Changchun 130061, China; 2 Key Laboratory for Oil Shale and Paragenetic Energy Minerals,Jilin Province, Changchun,130061, China; 3 Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037, China
Abstract:Oil shale is an important unconventional oil & gas resource. It is critical to comprehensively identify and evaluate oil shale recourse by utilizing key methods and technologies in the study of oil shale mineralization. The key technologies of oil shale identification include geology identification based on petrology,geochemistry identification,high-resolution logging,seismic technique for three-dimensional space description,advanced test technique,innovated theory & method and secondary exploitation of high-quality geophysics information,all of which will continuously improve the accuracy of oil shale identification and forecast from qualitative to the quantitative. The key methods in the study of oil shale mineralization are firstly to find out the geological factors,including palaeostructure,palaeogeographic and palaeoclimate conditions,and palaeolake environments,to discuss a combined effects on various organic matter sources,preservation conditions and diagenesis. Then,finely depict the process of organic matter enrichment of oil shale from qualitative to the quantitative,thus effectively forecast the patterns of oil shale formation and distribution. This paper was mainly based on the research results of continental oil shale-bearing basins in China. Due to the diversity of oil shale genetic type,there might exist differences of identifying characteristics between continental origin and marine origin oil shale,which still needs to be further studied and summarized. It is hoped that this paper could also be useful for researches an shale oil,shale gas and hydrocarbon source rocks.
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