大庆石油地质与开发2026，Vol.45Issue(1)：9-18,10.DOI:10.19597/J.ISSN.1000-3754.202404008
利用激光扫描共聚焦显微镜冷冻观测技术表征页岩亚微米孔隙中的含油性
Characterization of oil-bearing properties in sub-micron shale pores by laser scanning confocal microscope freezing observation technology:Taking shale oil of Qingshankou Formation in Gulong Sag of Songliao Basin as an example
摘要
Abstract
Light oil is an important target in shale oil exploration and development,but its volatility makes it diffi-cult to observe.In order to solve this problem,a specialized cold stage for laser scanning confocal microscope is de-veloped to determine observation temperature.On this basis,effective observation of oil-bearing property of sub-mi-cron pores of frozen shale samples is achieved through multiple scanning of reflected light,long-wave fluorescence and short-wave fluorescence.The results show that shale oil in Qingshankou Formation of Well A in Gulong Sag of Songliao Basin mostly presents to be irregular,patched and sporadic.The area content of light oil in sub-micron pores is significantly higher than that of heavy components(including heavy oil,resin asphaltene and hydrocarbon-generating parent material),with light/heavy ratio(area ratio)up to 2.5.In observed well intervals,light oil is mainly enriched in argillaceous siltstone and laminated shale,with vertical distribution characteristic of light oil in the upper part and heavy components in the lower part.Based on the distribution of light oil and light/heavy ratio,it is considered that Q4-5 and Q7 oil reservoirs are worthy of attention.Light oil enrichment is controlled not only by hy-drocarbon-generating parent material and the maturity but also by important factors of reservoir space within shale strata series and short-distance migration.Systematic observation of light oil shale and research on distribution laws provide important basis for optimizing exploration and development targets,selecting fracturing intervals in horizon-tal wells and further increasing shale oil production.关键词
页岩油/轻质油/激光扫描共聚焦显微镜/冷台/含油性/岩性/松辽盆地Key words
shale oil/light oil/laser scanning confocal microscope/cold stage/oil-bearing properties/lithology/Songliao Basin分类
能源科技引用本文复制引用
邵红梅,李照阳,王继平,张刘平,高波,黄晓天..利用激光扫描共聚焦显微镜冷冻观测技术表征页岩亚微米孔隙中的含油性[J].大庆石油地质与开发,2026,45(1):9-18,10.基金项目
黑龙江省重点研发计划"多资源协同陆相页岩油绿色开采全国重点实验室"(JD2023GJ02) （JD2023GJ02）
黑龙江省揭榜挂帅科技项目"古龙页岩油碳同位素分馏效应研究"(DQYT-2022-JS-753) （DQYT-2022-JS-753）
中国石油-北京大学基础研究项目"中低成熟度页岩油超临界水改质研究"(22-2-1). （22-2-1）
