Distribution Charcteristics and Genetic Analysis of Oil and Gas Fields in Santos Basin
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摘要: 巴西桑托斯盆地油气田分布具有“外重内轻，外大内小”的分布特征.轻质油藏（原油API°介于36°~58°之间）或气藏分布于近岸水深小于1 000 m范围内，且储量较小；而水深大于1 500 m区域则主要以正常原油为主（原油API°介于25°~32°之间），储量大.桑托斯盆地油气分布特征与盐下、盐上烃源岩性质，热演化程度以及盐岩分布有关.盐下湖相烃源岩主要为Ⅰ型有机质，倾向于生油，中央凹陷区处于高、过成熟阶段，而东部隆起带深水区域处于成熟阶段；盐上海相烃源岩主为要Ⅱ2-Ⅲ型有机质，倾向于生成轻质油和气，中央凹陷及以西区域处于油窗晚期.研究表明盐上凝析油主要来自盐上高成熟海相烃源岩的贡献；而中央坳陷北部以及以外深水区原油主要来自盐下中等成熟的优质湖相烃源岩.阐明桑托斯盆地油气分布特征及其成因，有助于深入了解桑托斯盆地成烃成藏以及油气分布规律，从而对于桑托斯盆地区块优选，降低投资风险具有重要意义.Abstract: Distribution of oil and gas/condensate fields is characterized with the feature of "large hydrocarbon reserves and heavy oil density in deep-water zone, while small hydrocarbon reserves and light oil density in relative shallow water area". Light oil reservoirs (with oil density of 36-58 API°) or gas/condensate reservoirs are located in the proximal shallow water area within the water depth of 1000 m with small hydrocarbon reserves, and oil fields in deep water area with water depth more than 1500 m, are mainly of normal oil (with oil density of 25-32 API°). The distribution of oil and gas fields is constrained by the nature of pre-salt and post-salt source rocks, source rock maturity and salt development. Lacustrine source rocks pre-salt with type Ⅰ organic matter are prone to oil, and of the high or over mature stage in central depression and of the mature stage in eastern deep-water area. Marine source rocks post-salt mainly of type Ⅱ2-Ⅲ kerogen are prone to light oil and gas, with the maturity of late oil window stage in central depression and western are of Santos basin. Studies show that light oils and gas condensate oils of post-salt reservoirs are originated from marine source rocks post salt of high maturity, while oils from deep water and north area of central depression mainly came from pre-salt high quality lacustrine source rocks of medium maturity. Constraining on the characteristic and origin of hydrocarbon of Santos Basin, is helpful to understand the principle of hydrocarbon distribution, generation and accumulation in Santos Basin thoroughly, and it also make significant sense to optimize potential blocks and reduce the risk of investment.
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图 1 桑托斯盆地油气田位置及原油物性分布
Fig. 1. Distribution of oil and gas fields and its hydrocarbon properties, Santos Basin
图 2 降解原油（L1）和正常原油(M15)萜烷和甾烷分布
Fig. 2. Distribution of terpanes and steranes of the biodegraded oil and non-biodegraded oil
图 3 桑托斯盆地典型两类原油甾、萜布特征
Fig. 3. Biomarker distribution characterization of two typical oil in Santos Basin
图 4 利用萜、甾烷生物标参数区分桑托斯盆地原油类型
Fig. 4. Oil classification based on parameters of terpanes and steranes biomarker parameters, Santos Basin
图 5 桑托斯盆地盐下、盐上烃源岩萜、甾烷分布特征
Fig. 5. Distribution of terpanes and steranes of pre-salt and post-salt source rocks of Santos Basin
图 6 利用萜、甾烷参数相关图进行油源对比
Fig. 6. Oil source correlation based on terpane and sterane parameters
图 7 桑托斯盆地湖相、海相来源油平面分布图
Fig. 7. Distribution of lacustrine and marine sourced oil of Santos Basin
图 8 桑托斯盆地盐上海相烃源岩TOC（%）平面分布图
Fig. 8. Plot of average TOC(%) value of marine source roks post salt, Santos Basin
图 9 桑托斯盆地盐下和盐上烃源岩OI-HI关系图
Fig. 9. Oxygen index vs. Hydrogen index of pre-salt and post-salt source rocks of Santos Basin
图 10 桑托斯盆地Aptian期蒸发岩厚度分布等值线图和剖面图
Fig. 10. Isochron and secion map of the Aptian evaporate sequence
图 11 桑托斯盆地盐下（a）和盐上(b)烃源岩成熟度平面分布
Fig. 11. Maturity of pre-salt and post-salt source rocks of Santos Basin
图 12 桑托斯盆地原油生物标志化合物成熟度参数相关图
Fig. 12. Correlation plot of oil maturity biomarker parameters of Santos Basin
表 1 桑托斯盆地部分原油样品及色谱参数及物性特征
Table 1. GC parameters and bulk characteristics of some oil samples of Santos Basin
样品 深度(m) 储层分布 API° 饱和烃(%) 芳烃(%) 非烃(%) Pr/Ph Pr/nC17 Ph/nC18 备注 M1 4 927.0 盐上 40.0 63.7 24.3 11.9 1.48 0.33 0.27 未降解 M2 4 959.0 盐上 73.9 19.0 7.1 1.37 0.36 0.30 未降解 M3 5 054.0 盐上 40.1 76.4 16.7 6.9 1.60 0.31 0.23 未降解 M4 5 094.0 盐上 42.0 73.7 17.9 8.4 1.43 0.33 0.27 未降解 M5 4 787.0 盐上 33.7 66.6 22.0 11.4 1.85 0.50 0.32 未降解 M6 5 281.0 盐上 42.1 80.0 10.5 9.5 1.50 0.34 0.27 未降解 M7 5 257.0 盐上 39.1 84.6 13.0 2.3 1.48 0.31 0.24 未降解 M8 5 286.0 盐上 36.1 79.4 16.0 6.4 1.56 0.36 0.26 未降解 M9 5 242.5 盐上 39.2 82.8 15.2 2.1 1.80 0.25 0.17 未降解 M10 5 683.0 盐上 44.4 75.8 19.2 5.0 1.74 0.27 0.19 未降解 M11 4 779.0 盐上 41.0 71.5 18.7 9.9 1.47 0.37 0.29 未降解 M12 4 860.0 盐上 43.0 73.8 17.9 8.3 1.79 0.33 0.22 未降解 M13 3 405.7 盐上 \ 74.0 12.4 13.6 1.38 0.46 0.34 未降解 M14 4 788.0 盐上 31.0 62.1 24.4 13.6 1.48 0.36 0.29 未降解 M15 4 864.0 盐上 39.8 71.8 18.9 9.3 1.63 0.32 0.24 未降解 M16 5 088.0 盐上 \ 79.1 18.3 2.6 1.55 0.13 0.10 未降解 M17 4 769.0 盐上 38.2 68.0 19.8 12.1 1.90 0.57 0.36 未降解 M18 4 910.5 盐上 39.4 77.6 16.7 5.7 1.53 0.38 0.29 未降解 M19 3 320.0 盐上 44.0 72.3 17.9 9.9 1.50 0.29 0.24 未降解 M20 3 679.5 盐上 \ 78.6 13.5 7.9 1.91 0.22 0.14 未降解 M21 4 174.0 盐上 \ 68.2 16.8 15.0 1.83 0.52 0.34 未降解 M22 4 739.0 盐上 41.8 81.2 13.4 5.4 1.73 0.18 0.13 未降解 M23 4 699.2 盐上 32.4 73.2 22.1 4.6 1.44 0.22 0.20 未降解 M24 4 750.0 盐上 44.6 75.6 17.1 7.3 1.60 0.18 0.13 未降解 M25 4 163.0 盐上 42.0 77.5 14.6 7.9 1.95 0.30 0.18 未降解 M26 4 780.0 盐上 38.3 77.8 16.1 6.1 1.74 0.20 0.13 未降解 M27 5 042.8 盐上 33.1 61.1 34.0 4.1 1.27 0.20 0.19 未降解 L1 2 565.0 盐上 \ \ \ \ \ \ \ 降解5级 L2 2 915.4 盐上 \ 31.44 25.30 43.26 \ \ \ 降解5级 L3 3 840.5 盐上 34.50 64.91 20.49 14.60 1.43 0.31 0.27 未降解 L4 3 873.0 盐上 32.30 65.60 15.36 19.04 1.57 0.32 0.24 未降解 L5 4 174.0 盐上 35.90 72.67 16.57 10.76 1.53 0.30 0.23 未降解 L6 2 977.0 盐上 \ 55.09 19.87 25.04 1.61 0.68 0.54 降解2级 L7 5 264.0 盐下 27.15 53.53 21.38 25.09 \ \ \ 未降解 L8 5 305.6 盐下 29.78 56.79 18.52 24.69 2.89 1.23 0.41 未降解 L9 5 351.8 盐下 28.43 50.20 23.31 26.49 2.14 1.02 0.53 未降解 L10 5 409.8 盐下 27.80 48.21 23.44 28.35 1.88 0.86 0.59 未降解 L11 5 461.0 盐下 27.96 \ \ \ 1.82 0.88 0.60 未降解 L12 5 516.0 盐下 27.65 \ \ \ 2.11 0.99 0.54 未降解 L13 4 931.96 盐下 37.37 \ \ \ 1.81 0.81 0.60 未降解 
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表 2 桑托斯盆地原油样品主要饱和烃生物标志化合物参数
Table 2. Key biomarker parameters of saturate fraction of oil samples, Santos Basin
样品号 深度(m) 储层 油族 P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14 L1 2 565.0 盐上 Ⅰ类 0.14 0.78 0.60 0.18 1.61 1.64 0.81 0.57 2.10 0.28 5.71 0.40 0.37 4.92 L2 2 915.0 盐上 Ⅰ类 0.13 0.74 0.63 0.23 1.30 1.26 0.46 0.89 2.79 0.83 6.31 0.69 0.42 13.69 L3 3 840.0 盐上 Ⅰ类 0.18 0.90 0.55 0.34 1.07 1.47 0.65 0.57 1.60 0.27 2.18 0.39 0.43 4.44 L4 3 873.0 盐上 Ⅰ类 0.11 0.76 0.52 0.25 1.29 1.87 0.42 0.42 1.57 0.33 2.10 0.31 0.44 5.37 L5 4 174.0 盐上 Ⅰ类 0.12 0.86 0.64 0.19 1.33 1.93 0.99 0.45 1.96 0.42 2.12 0.51 0.54 3.71 L6 3 405.0 盐上 Ⅰ类 0.11 0.69 0.63 0.13 1.44 1.81 1.21 0.50 1.56 0.21 2.65 0.33 0.44 3.76 L7 5 264.0 盐下 Ⅰ类 0.09 0.76 0.67 0.33 1.16 1.85 0.31 0.55 1.62 0.21 2.30 0.45 0.50 8.15 L8 5 305.6 盐下 Ⅰ类 0.08 0.84 0.76 0.32 1.15 1.87 0.31 0.56 1.65 0.36 2.48 0.49 0.47 9.11 L9 5 351.8 盐下 Ⅰ类 0.08 0.85 0.77 0.32 1.16 1.89 0.31 0.56 1.66 0.37 2.55 0.44 0.49 9.24 L10 5 409.8 盐下 Ⅰ类 0.08 0.85 0.76 0.32 1.30 1.89 0.29 0.56 1.66 0.37 2.54 0.53 0.41 9.22 L11 5 461.0 盐下 Ⅰ类 0.09 0.82 0.73 0.32 1.29 1.90 0.30 0.56 1.63 0.36 2.38 0.45 0.48 7.23 L12 5 516.0 盐下 Ⅰ类 0.09 0.82 0.73 0.32 1.16 1.90 0.30 0.56 1.65 0.37 2.60 0.41 0.46 9.59 L13 4 931.96 盐下 Ⅰ类 0.10 0.76 0.66 0.27 1.15 1.88 0.29 0.53 1.61 0.25 1.80 0.47 0.43 6.68 L14 5 408.3 盐下 Ⅰ类 0.09 0.77 0.65 0.33 1.22 1.77 0.31 0.53 1.49 0.15 2.43 0.43 0.43 9.19 L15 5 608.0 盐下 Ⅰ类 0.09 0.75 0.65 0.27 1.22 1.96 0.32 0.54 1.64 0.13 2.34 0.40 0.44 7.81 L16 5 334.7 盐下 Ⅰ类 0.09 0.75 0.65 0.33 1.15 2.00 0.33 0.55 1.71 0.17 2.38 0.54 0.44 8.12 L17 5 474.2 盐下 Ⅰ类 0.09 0.75 0.65 0.32 1.18 1.95 0.33 0.56 1.69 0.17 2.37 0.54 0.41 8.05 L18 5 600.5 盐下 Ⅰ类 0.08 0.75 0.64 0.33 1.21 1.88 0.31 0.55 1.56 0.17 2.61 0.56 0.50 8.15 L19 5 318.3 盐下 Ⅰ类 0.09 0.76 0.66 0.32 1.22 1.89 0.31 0.54 1.60 0.22 2.48 0.57 0.52 8.27 L20 5 739.6 盐下 Ⅰ类 0.09 0.76 0.65 0.33 1.17 1.87 0.31 0.54 1.64 0.22 2.44 0.61 0.49 8.00 L21 5 761.6 盐下 Ⅰ类 0.09 0.92 0.80 0.33 1.18 1.91 0.34 0.58 1.96 0.22 3.31 0.57 0.50 10.52 L22 5 380.5 盐下 Ⅰ类 0.09 0.77 0.68 0.31 1.24 1.88 0.32 0.55 1.69 0.22 2.42 0.63 0.48 7.35 L23 5 682.0 盐下 Ⅰ类 0.09 0.77 0.68 0.31 1.23 1.88 0.32 0.54 1.64 0.22 2.38 0.62 0.48 7.51 L24 5 380.5 盐下 Ⅰ类 0.08 0.75 0.66 0.31 1.22 1.87 0.32 0.54 1.62 0.19 2.49 0.60 0.46 7.83 M1 4 927.0 盐上 Ⅱ类 0.50 0.70 0.85 0.47 1.08 2.71 2.33 0.46 2.19 0.16 1.10 0.49 0.61 2.01 M2 4 959.0 盐上 Ⅱ类 0.30 0.88 0.63 0.51 1.08 2.17 1.68 0.74 2.64 0.19 0.91 0.45 0.59 2.13 M3 5 054.0 盐上 Ⅱ类 0.66 0.74 0.70 0.37 1.07 2.35 4.89 0.54 2.07 0.00 0.75 0.46 0.62 0.60 M4 5 094.0 盐上 Ⅱ类 0.65 0.76 0.70 0.38 0.99 2.41 3.43 0.99 2.80 0.69 0.54 0.48 0.62 0.79 M5 4 910.0 盐上 Ⅱ类 0.46 0.63 0.65 0.33 0.99 2.63 3.95 0.55 2.20 0.62 0.78 0.45 0.65 0.62 M6 5 257.0 盐上 Ⅱ类 0.53 0.77 0.56 0.13 0.95 2.51 6.00 0.30 0.53 0.66 M7 5 286.0 盐上 Ⅱ类 0.53 0.72 0.66 0.11 1.09 2.59 1.54 0.56 2.32 0.24 0.52 0.46 0.62 0.63 M8 5 281.0 盐上 Ⅱ类 0.62 0.68 0.64 0.14 1.05 1.94 3.84 0.85 2.78 2.14 0.59 0.49 0.64 0.33 M9 5 242.0 盐上 Ⅱ类 0.47 0.90 0.82 0.37 1.21 2.69 1.56 0.60 1.63 0.12 0.63 0.52 0.60 2.07 M10 5 683.0 盐上 Ⅱ类 0.23 0.75 0.50 0.36 0.67 2.46 1.96 0.53 1.58 0.04 0.55 0.62 0.61 1.13 M11 4 779.0 盐上 Ⅱ类 0.59 0.57 0.54 0.73 1.04 2.98 1.29 0.45 2.12 0.14 0.76 0.49 0.62 2.55 M12 4 860.0 盐上 Ⅱ类 0.72 0.61 0.49 0.66 1.19 2.71 1.64 0.44 2.09 0.15 0.74 0.47 0.62 2.05 M13 2 977.0 盐上 Ⅱ类 0.28 0.68 0.54 0.37 1.01 2.43 0.60 0.49 2.33 0.12 0.59 0.40 0.53 1.92 M14 4 788.0 盐上 Ⅱ类 0.46 0.67 0.67 0.70 0.99 2.87 1.17 0.48 2.23 0.29 0.85 0.47 0.58 2.57 M15 4 864.0 盐上 Ⅱ类 0.65 0.64 0.64 0.70 0.93 2.83 1.51 0.47 2.06 0.14 0.71 0.50 0.63 2.11 M16 5 088.0 盐上 Ⅱ类 0.82 0.84 0.64 0.57 1.08 2.11 0.87 0.55 1.62 0.57 1.06 0.37 0.41 3.68 M17 4 769.0 盐上 Ⅱ类 0.30 0.68 0.76 0.46 1.08 3.02 2.04 0.48 2.19 0.00 1.12 0.48 0.59 1.48 M18 4 787.0 盐上 Ⅱ类 0.34 0.67 0.71 0.46 1.02 2.77 1.94 0.52 2.07 0.18 0.95 0.47 0.62 1.36 M19 3 679.0 盐上 Ⅱ类 0.26 0.73 0.65 0.40 1.21 2.19 1.10 0.58 1.39 0.06 1.26 0.44 0.55 5.03 M20 4 174.0 盐上 Ⅱ类 0.18 0.54 0.69 0.39 1.18 2.51 1.00 0.57 1.71 0.05 1.38 0.44 0.54 4.93 M21 4 163.0 盐上 Ⅱ类 0.61 0.60 0.62 0.93 1.44 3.16 0.87 0.66 2.96 0.08 0.41 0.42 0.62 4.01 M22 4 739.0 盐上 Ⅱ类 1.91 0.69 0.60 2.37 1.24 3.73 2.74 0.57 2.27 0.08 0.61 0.44 0.56 4.11 M23 4 780.0 盐上 Ⅱ类 1.92 0.59 0.56 2.57 1.02 2.81 1.88 0.80 2.94 0.05 0.59 0.44 0.59 6.64 M24 4 750.0 盐上 Ⅱ类 1.69 0.89 0.73 2.31 1.00 3.94 1.50 0.62 1.69 0.04 0.47 0.56 0.55 4.24 M25 3 320.0 盐上 Ⅱ类 0.34 0.65 0.50 1.07 0.98 2.03 0.66 0.75 1.82 0.11 0.91 0.38 0.52 4.54 M26 4 699.0 盐上 Ⅱ类 0.19 0.93 0.57 0.62 1.01 1.27 0.85 0.81 1.76 0.09 1.13 0.39 0.55 4.82 M27 5 042.0 盐上 Ⅱ类 0.16 0.92 0.54 0.54 1.05 1.13 0.71 0.90 1.63 0.11 1.30 0.43 0.54 4.82 注：P1. C19/C21三环萜烷；P2. C21/C23三环萜烷；P3. C24/C23三环萜烷；P4. C24四环萜烷/C26三环萜烷；P5. C26/C26三环萜烷；P6. C28-29/C26三环萜烷；P7. Ts/Tm；P8. C29/C30藿烷；P9. C31-35/C30藿烷；P10. Ga./C30藿烷；P11. C30四环聚异二烯类化合物/C27重排甾烷；P12. C29 S/S+R；P13. C29ββ/ββ+αα；P14. 藿烷/甾烷.
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表 3 桑托斯盆地盐下烃源岩主要饱和烃生物标志化合物参数
Table 3. Key biomarker parameters of saturate fraction of pre-salt source rocks, Santos Basin
样品号 深度(m) 层位 岩性 P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14 LSR1 6 873 B.V 泥岩 0.06 0.52 0.65 0.60 1.00 1.80 0.70 0.75 1.73 0.17 1.42 0.35 0.50 4.61 LSR2 5 415 Itapema 泥岩 0.07 0.70 0.63 0.51 1.11 2.18 0.53 0.73 1.79 0.22 2.16 0.40 0.52 5.68 LSR3 5 337 BV 泥岩 0.07 0.75 0.61 0.59 1.02 2.11 0.56 0.76 2.35 0.19 2.02 0.35 0.51 6.12 LSR4 5 501 Itapema 泥岩 0.10 0.86 0.61 0.59 1.03 1.99 0.56 0.80 1.90 0.19 1.85 0.36 0.52 5.77 LSR5 5 772 Picarras 泥岩 0.22 0.92 0.56 0.66 0.71 1.14 0.65 0.26 1.46 0.38 0.47 3.97 LSR6 5 752 B.V 泥岩 0.08 0.79 0.60 0.45 1.03 1.84 0.44 0.65 1.71 0.16 2.40 0.39 0.50 6.76 LSR7 6 001 Itapema 泥岩 0.09 0.91 0.60 0.46 1.02 1.73 0.40 0.74 1.65 0.13 2.25 0.41 0.48 7.53 LSR8 5 800 B.V 泥岩 0.07 0.80 0.61 0.42 1.08 1.74 0.46 0.64 1.67 0.15 2.19 0.38 0.51 6.50 LSR9 5 851 Itapema 泥岩 0.08 0.83 0.62 0.43 1.07 1.84 0.50 0.65 1.70 0.18 1.80 0.39 0.51 5.81 LSR10 5 902 Itapema 泥岩 0.10 0.96 0.65 0.44 1.07 1.74 0.50 0.69 1.70 0.17 1.69 0.38 0.51 5.56 LSR11 5 950 Itapema 泥岩 0.12 0.98 0.58 0.49 1.02 1.77 0.46 0.68 1.94 0.16 1.50 0.37 0.51 6.20 LSR12 4 752~4 755 Itapema 泥岩 0.06 0.50 0.50 0.70 1.22 2.45 0.85 0.72 1.85 0.19 2.63 0.29 0.46 1.79 LSR13 4 551~4 554 B.V 泥岩 0.09 0.79 0.57 0.57 1.17 2.11 0.40 0.55 1.64 0.29 2.07 0.27 0.43 2.89 LSR14 4 881~4 884 Camboriu 泥岩 0.07 0.68 0.60 0.63 1.29 2.03 1.22 0.68 1.69 0.19 1.62 0.25 0.44 1.89 LSR15 4 662~4 665 B.V 泥岩 0.08 0.66 0.55 0.72 1.25 2.19 0.47 0.66 1.87 0.16 1.53 0.27 0.45 2.43 LSR16 4 416~4 419 B.V 泥岩 0.08 0.67 0.58 0.61 1.23 1.96 1.04 0.73 1.69 0.20 1.29 0.21 0.42 1.47 LSR17 5 655 Itapema 泥岩 0.11 0.87 0.58 0.80 1.00 2.40 0.77 0.84 1.57 0.12 1.47 0.31 0.49 4.88 LSR18 5 844 Itapema 泥岩 0.12 0.86 0.53 0.59 0.90 2.49 0.67 0.83 1.96 0.16 1.31 0.30 0.50 4.41 LSR19 5 592 Itapema 泥岩 0.12 1.10 0.61 0.56 1.08 1.82 0.61 0.83 1.88 0.19 1.45 0.21 0.45 3.95 LSR20 5 625 Itapema 泥岩 0.07 0.87 0.61 0.52 1.10 2.18 0.61 0.79 1.82 0.20 1.41 0.24 0.43 4.07 LSR21 5 856 B.V 泥岩 0.00 0.66 0.55 0.76 0.96 2.28 0.68 0.78 1.84 0.14 1.28 0.38 0.50 4.37 LSR22 5 256 B.V 泥岩 0.11 0.69 0.55 0.63 1.00 2.48 0.66 0.79 1.93 0.18 1.74 0.36 0.52 5.92 LSR23 5 301 B.V 泥岩 0.13 0.75 0.61 0.66 0.99 2.01 0.57 0.63 1.65 0.18 1.75 0.36 0.48 5.55 LSR24 4 950 B.V 泥岩 0.05 0.47 0.68 0.60 1.03 1.99 0.78 0.75 1.71 0.17 1.62 0.39 0.51 3.72 LSR25 5 652 Picarras 泥岩 0.15 0.74 0.55 0.70 0.93 1.96 0.59 0.68 1.75 0.18 1.34 0.34 0.48 4.36 LSR26 5 601 Picarras 泥岩 0.12 0.72 0.58 0.58 1.05 1.94 0.68 0.70 1.78 0.19 1.32 0.37 0.50 4.74 LSR27 5 451 B.V 泥岩 0.08 0.62 0.59 0.58 0.97 1.99 0.56 0.71 1.77 0.19 1.29 0.37 0.46 4.87 LSR28 5 751 Camboriu 泥岩 0.13 0.81 0.55 0.60 0.95 2.12 0.63 0.68 1.62 0.18 1.27 0.35 0.47 4.56 LSR29 5 940 B.V 泥岩 0.13 0.72 0.54 0.72 0.83 0.56 0.62 0.22 1.42 0.38 0.51 3.82 LSR30 5 874 B.V 泥岩 0.08 0.71 0.45 0.64 1.11 1.97 0.45 0.58 1.44 0.15 1.46 0.36 0.48 4.81 LSR31 6 450 Itamema 泥岩 0.08 0.71 0.55 0.52 0.92 2.33 0.65 0.75 1.70 0.25 1.39 0.38 0.54 5.30 LSR32 6 585 Camboriu 泥岩 0.10 0.73 0.55 0.77 0.97 1.90 0.68 0.84 1.94 0.12 1.27 0.37 0.53 5.04 LSR33 6 075 Itamema 泥岩 0.07 0.64 0.60 0.70 0.97 2.25 0.64 0.81 1.75 0.13 1.21 0.35 0.51 4.85 LSR34 6 450~6 453 B.V 泥岩 0.11 0.90 0.57 0.44 1.00 2.06 0.45 0.60 1.69 0.40 1.29 0.36 0.48 4.88 LSR35 5 802~5 805 B.V 泥岩 0.05 0.71 0.57 0.39 1.01 2.13 0.33 0.48 1.63 0.52 1.24 0.38 0.47 4.98 注：P1. C19/C21三环萜烷；P2. C21/C23三环萜烷；P3. C24/C23三环萜烷；P4. C24四环萜烷/C26三环萜烷；P5. C26/C26三环萜烷；P6. C28-29/C26三环萜烷；P7. Ts/Tm；P8. C29/C30藿烷；P9. C31-35/C30藿烷；P10. Ga./C30藿烷；P11. C30四环聚异二烯类化合物/C27重排甾烷；P12. C29 S/S+R；P13. C29ββ/ββ+αα；P14. 藿烷/甾烷.
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