岩矿测试2026，Vol.45Issue(1)：14-30,17.DOI:10.15898/j.ykcs.202505280131
四川盆地海相页岩固体沥青与沥青包裹体成熟度对比分析及地质意义
Comparative Analysis of Maturity between Solid Bitumen and Bitumen Inclusions in Marine Shale of the Sichuan Basin and Its Geological Significance
摘要
Abstract
Organic matter maturity serves as a critical indicator for evaluating hydrocarbon generation potential of source rocks and shale gas preservation conditions.In recent years,laser Raman spectroscopy has been widely applied to study organic matter maturity in ancient marine shales due to its non-destructive nature and high resolution.Although scholars have established quantitative models for thermal evolution degree based on Raman spectral characteristics of solid bitumen in shales,significant research gaps remain in characterizing the maturity of bitumen inclusions within fracture-filling minerals.This study focuses on the Lower Cambrian Qiongzhusi Formation shale and bitumen inclusions in fracture-filling minerals from the Sichuan Basin.Through micro-laser Raman spectroscopy combined with peak deconvolution,maturity differences between bitumen inclusions and solid bitumen in shales are systematically compared,providing new perspectives for marine shale organic matter maturity evaluation.Results demonstrate that the calculated maturity of shale solid bitumen based on peak height ratio(ID1/IG)ranges from 3.32%to 3.64%,whereas bitumen inclusions range from 3.51%to 3.71%with lower data dispersion.At identical depths,bitumen inclusions generally exhibit higher maturity than solid bitumen,with absolute differences of 0.02%-0.22%,indicating that closed systems better preserve thermal evolution information of organic matter.Bitumen inclusions are more suitable for reconstructing organic matter thermal history,whereas solid bitumen maturity in shale should primarily serve as an evaluation index for source rocks.关键词
海相页岩/页岩固体沥青/沥青包裹体/成熟度/有机质热演化历史重建/烃源岩评价指标/显微激光拉曼光谱Key words
marine shale/shale solid bitumen/asphalt inclusions/maturity/reconstruction of the thermal evolution history of organic matter/evaluation indicators of source rocks/microscopic laser Raman spectroscopy分类
化学化工引用本文复制引用
周志鹏,焦堃,吴娟,罗超,梁静怡,陈钰,谢金旭,王恒,蒋前前,邓宾..四川盆地海相页岩固体沥青与沥青包裹体成熟度对比分析及地质意义[J].岩矿测试,2026,45(1):14-30,17.基金项目
四川省自然科学基金面上项目(2025ZNSFSC0310,2023NSFSC0262) （2025ZNSFSC0310,2023NSFSC0262）
中国地质大学构造与油气资源教育部重点实验室开放基金(TPR-2024-01) （TPR-2024-01）
国家自然科学基金面上项目(42372174) （42372174）
