Abstract: Shale oil-gas resources are abundant in China, which have become the real alternative energies. However, there are still disputes on hydrocarbon classification system, resource assessment criteria and methods for shale oil-gas resources, thus leading to a large difference in the assessment results. By deeply analyzing the connotation, types and geological characteristics of shale oil and gas and systematically summarizing the previous research results, the paper determines the shale oil-gas classification scheme, puts forwards corresponding standard resource assessment methods, and further evaluates and analyzes the potential of shale oil-gas resources in China. The results indicate that the geological reserves of shale oil in ten major basins of China reach 318.99×10⁸t, and the recoverable resources are estimated to be 22.78×10⁸t; while those of major basins/areas in China are 65.48×10¹²m³ and 13.24× 10¹²m³, respectively. Shale oil resources are mainly enriched in Ordos Basin, Songliao Basin and Bohai Bay Basin, oil reservoirs are mainly distributed in the Upper Triassic, Cretaceous and Paleogene strata, respectively, within a depth of 4 500 m. Shale gas resources primarily occurred in Sichuan Basin, most of which were in the Upper Paleozoic strata at a depth over 2 000 m. Based on the assessment results and exploration practices of shale oil-gas resources, it is considered that shale oil is mainly enriched in Member 7 of Triassic Yanchang Formation in Longdong area, Jiyuan area, and Zhijing-Ansai area of Ordos Basin, as well as the Cretaceous Qingshankou Formation in Gulong sag and Sanzhao sag of Songliao Basin, the Paleogene Shahejie Formation in Dongying sag and Zhanhua sag and the Member 2 of Paleogene Kongdian Formation in Cangdong sag of Bohai Bay Basin, as well as Lucaogou Formation in Jimusaer sag and Fengcheng Formation in Mahu sag of Junggar Basin; shale gas is mainly accumulated in Changning, Weiyuan, Luzhou and West Chongqing areas in the south of Sichuan Basin.

Key words: shale oil, shale gas, resource assessment, geological resources, recoverable resources, resource potential

摘要： 中国页岩油气资源丰富,已成为现实接替能源。但目前页岩油气分类体系、资源起评标准及评价方法存在分歧,造成其评价结果差异较大。在深入分析页岩油气内涵、分类及地质特征的基础上,通过系统总结前人的研究成果,明确了页岩油气的分类方案,并提出与之相适应且规范的资源评价方法,进而评价和分析了中国页岩油气资源潜力。评价结果表明:中国10大盆地页岩油地质资源量为318.99×10⁸t,技术可采资源量为22.78×10⁸t;中国重点盆地/地区的页岩气地质资源量为65.48×10¹²m³,技术可采资源量为13.23×10¹²m³。页岩油资源以鄂尔多斯盆地、松辽盆地和渤海湾盆地最为富集,油藏分别集中在上三叠统、白垩系和古近系,埋深主要在4 500 m以浅;页岩气资源主要赋存在四川盆地,以下古生界气藏资源最为丰富,埋深主要在2 000 m以深。结合页岩油气资源评价结果和勘探实践认为:鄂尔多斯盆地陇东 地区、姬塬地区、志靖—安塞地区三叠系延长组7段,松辽盆地古龙凹陷与三肇凹陷白垩系青山口组,渤海湾盆地东营凹陷与沾化凹陷古近系沙河街组、沧东凹陷古近系孔店组二段,准噶尔盆地吉木萨尔凹陷芦草沟组和玛湖凹陷风城组是中国页岩油资源富集区;四川盆地南部长宁、威远、泸州及渝西地区为页岩气资源富集区。

关键词: 页岩油, 页岩气, 资源评价, 地质资源量, 可采资源量, 资源潜力