Generation, Migration and Accumulation Model for the Marine Oils in the Tarim Basin
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摘要: 塔里木盆地油气源长期争论不休.采用单体烃同位素、包裹体成分与年代指示生物标志物等途径, 对塔里木盆地塔中、轮南典型油气藏进行了油气成因与混源成藏模式的研究.结果表明, 塔中、轮南绝大部分原油生物标志物与中上奥陶统烃源岩相似, 仅少部分原油显现与寒武系—下奥陶统烃源岩相近的特征, 但正构烷烃单体烃碳同位素分析表明, 原油绝大部分实质仍为混源油.塔中包裹烃成分分析进一步证实了原油的混源特性.利用同位素进行的混源定量结果表明, 塔中原油中寒武系—下奥陶统成因原油的混入量约为11%~100%(均值45%); 轮南地区约为11%~70%(均值36%), 表明寒武系—下奥陶统、中上奥陶统均为塔里木盆地的主力烃源岩.油气运移地化指标与地质条件的综合研究认为, 塔中地区断层是油气运移的重要通道, 塔中I号断层与斜交的走滑断层的交汇点是油气的主要注入点; 轮南地区侧向运移特征较明显.研究区存在调整型、多期充注型与原生型多种混源成藏模式.塔里木海相油气的普遍混源表明深层仍有油气勘探潜能.揭示海相混源油气成藏机制是指导塔里木海相油气勘探的关键.Abstract: The origin and accumulation mechanism of the marine oils in the Tarim basin has long been a disputed issue. Compound specific isotope, fluid inclusion technique and age-indicating biomarkers have been used in investigating hydrocarbons generation and migration in this study. It is observed that most of the oils in the Tazhong and Lunnan uplifts correspond well with the Middle-Upper Ordovician source rocks according to biomarkers, suggesting their good genetic relationship. However, the compound specific isotope of n-alkanes shows that the oils are primarily mixed oils from both the ∈-O1 and the O2+3 strata, which is further proved by chemical components in fluid inclusions. It is predicated by δ13C of n-alkanes that, the ∈-O1 genetic affinity oils mixed in the Tazhong oils range in 11%-100% (average of 45%), and about 11%-70% (average of 36%) in the Lunnan oils, which suggests that both the ∈-O1 and the O2+3 are the main source intervals for the oils in the Tarim basin. A comprehensive study of migration fractionations of biomarkers and geological conditions shows that, No.1 fault and the associated faults played an essential role in hydrocarbons migration with several main charging points observed where strike slip faults cutting across the No.1 fault. However, lateral migration is an important pattern for the Lunnan oils. Several oil-mixing models are concluded including adjusting type with oil mixing during hydrocarbons re-migration and re-accumulation, multiple-charging type with hydrocarbons from different episodes, and primary type with oil mixed during secondary migration pathway even during primary migration. Our opinion of intensive oil mixing in the Tarim basin suggests great deep petroleum potential in the basin, and unraveling hydrocarbons-accumulation mechanism is significant for further petroleum exploration.
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Key words:
- biomarkers /
- compound specific isotope /
- fluid inclusion /
- oil mixing model /
- petroleum geology
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图 1 塔中中央隆起构造单元与部分油样位置
①Ⅰ号断裂带；②TZ47-15井区；③TZ2井区；④TZ16井区；⑤TZ4井区；⑥TZ1-6井区
Fig. 1. Tectonic units and location of oil samples in the Tazhong uplift
图 2 塔中部分原油m/z=217质量色谱
Fig. 2. Partial m/z=217 mass fragmentograms for selected oils in the Tazhong uplift
图 3 塔中原油、烃源岩生物标志物参数对比指示混源
Fig. 3. Oil-oil and oil-source rock correlation showing mixed sources of the Tazhong oils
图 4 塔中原油、烃源岩正构烷烃单体同位素指示原油混源
Fig. 4. δ13C values of individual n-alkanes for oils and source rock in the Tazhong uplift and the peripheral zone indicating oil mixing
图 5 塔中碳酸盐岩储层方解石脉包裹烃m/z=218质量色谱
Fig. 5. Partial m/z=218 mass fragmentograms of the fluid inclusion oils from Carbonate reservoir in the Tazhong uplift
图 6 塔中Ⅰ号构造带东西向原油基本地球化学参数指示油气运移特征
纵坐标.样品代号，按地理位置从左向右排列；MNR.甲基萘指数；MPI—1.甲基菲指数I；4, 9—/3, 4—DAD.4, 9—/3, 4—二甲基金刚烷；黑箭头指示油气注入点，一般为转换断层发育附近
Fig. 6. Geochemical parameters of the oils around the No.1 fault indicating basic oil migration features
图 7 塔中、轮南地区∈—O1成因原油混入量与埋深关系
Fig. 7. Percent of ∈—O1 genetic affinity oils mixed versus oil burial depth
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[1] Cai, C.F., Li, K.K., Ma, A.L., et al., 2009. Distinguishing Cambrian from Upper Ordovician source rocks: evidence from sulfur isotopes and biomarkers in the Tarim basin. Organic Geochemistry, 40(7): 755-768. doi: 10.1016/j.orggeochem.2009.04.008 [2] Cai, C.F., Li, K.K., Wu, G.H., et al., 2007. Sulfur isotopes as markers of oil-source correlation and thermochemical sulphate reduction in central Tarim. In: Abstracts of International Meeting of Organic Geochemistry, September, 19-24, O36, Torquay, UK, 297-298. [3] Chen, L.X., Yang, H.J., Wu, G.H., et al., 2008. Characteristics of the Ordovician reef-shoal reservoir in Tazhong No. 1 slope-break zone, Tarim basin. Xinjiang Petroleum Geology, 29(3): 327-330 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-XJSD200803016.htm [4] Chen, Y.Z., Liu, L.F., Chen, L.X., et al., 2004. Hydrocarbon migration of Silurian paleo-pools in Tazhong and Tabei areas of Tarim basin. Earth Science—Journal of China University of Geosciences, 29(4): 473-482 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DQKX200404015.htm [5] England, W.A., Mackenzie, A.S., 1989. Some aspects of the organic geochemistry of petroleum fluids. Geologische Rundschau, 78(1): 291-303. doi: 10.1007/BF01988365 [6] Graham, S.A., Brassell, S., Carroll, A.R., et al., 1990. Characteristics of selected petroleum source rocks, Xianjiang Uygur Autonomous Region, Northwest China. The American Association of Petroleum Geologists Bulletin, 74(4): 493-512. doi: 10.1306/44B4C26AF-170A-11D7-8645000102C1865D [7] Jiang, C.Q., Li, M.W., Osadetz, K.G., et al., 2001. Bakken/Madison petroleum systems in the Canadian Williston basin. Part 2: molecular markers diagnostic of Bakken and Lodgepole source rocks. Organic Geochemistry, 32(9): 1037-1054. doi: 10.1016/S0146-6380(01)00079-1 [8] Li, S.M., Li, M.W., Pang, X.Q., et al., 2003. Geochemistry of petroleum systems in the Niuzhuang south slope of Bohai Bay basin—part 1: source rock characterization. Organic Geochemistry, 34(3): 389-412. doi: 10.1016/S0146-6380(02)00210-3 [9] Li, S.M., Li, M.W., Pang, X.Q., et al., 2009. Origin of crude oils with unusually high dibenzothiophene concentrations in the Tazhong uplift, Tarim basin. Journal of Geochemical Exploration, 101(1): 60. doi: 10.1016/j.gexplo.2008.12.053 [10] Li, S.M., Pang, X.Q., Jin, Z.J., 2002. Distribution and significance of steroids in Bamianhe oilfield, East China. Earth Science—Journal of China University of Geosciences, 27(6): 711-717 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DQKX200206009.htm [11] Li, S.M., Pang, X.Q., Yang, H.J., et al., 2008a. Geochemical characteristics and implication of high thermal maturity oils in Tazhong-Ⅰ faulted slope break zone. Oil & Gas Geology, 29(2): 210-216 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-SYYT200802008.htm [12] Li, S.M., Pang, X.Q., Yang, H.J., et al., 2008b. Characteristics and genetic type of the oils in the Tazhong uplift. Earth Science—Journal of China University of Geosciences, 33(5): 635-642 (in Chinese with English abstract). doi: 10.3799/dqkx.2008.078 [13] Li, S.M., Pang, X.Q., Yang, H.J., et al., 2009a. MCI analysis and its significance of palaeozoic reservoir in Tarim central uplift. Bulletin of Mineralogy, Petrology and Geochemistry, 28(1): 34-41 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-KYDH200901007.htm [14] Li, S.M., Pang, X.Q., Yang, H.J., 2009b. Approaches and techniques for quantitative predication of mixed oils. Geological Science and Technology Information, 28(1): 75-81 (in Chinese with English abstract). http://www.zhangqiaokeyan.com/academic-journal-cn_geological-science-technology-information_thesis/0201253254837.html [15] Li, S.M., Pang, X.Q., Jin, Z.J., et al., 2010. Mixed-source oils from subtle pools in the Dongying south slope of Bohai Bay basin: insight from biomarkers and compound specific isotope analyses. Marine and petroleum Geology. doi: 10.1016/j.marpetgeo.2010.04.004 [16] Liang, D.G., Zhang, S.C., Zhang, B.M., et al., 2000. Understanding on marine oil generation in China based on Tarim basin. Earth Science Frontiers, 7(4): 534-547 (in Chinese with English abstract). http://www.researchgate.net/publication/291807035_Understanding_on_marine_oil_generation_in_China_based_on_Tarim_Basin [17] Liu, L.F., Kang, Y.S., 1998. Investigation on secondary migration of oils in central Tarim, Tarim basin using pyrrolic nitrogen compounds. Geochimica, 27(5): 475-482 (in Chinese with English abstract). http://d.wanfangdata.com.cn/periodical/QK199800054220 [18] Sun, Y.G., Xiao, Z.Y., Xu, S.P., et al., 2004. Aryl-isoprenoids in crude oil and its implication in geological exploration. Xinjiang Petroleum Geology, 25(2): 215-218 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-XJSD200402032.htm [19] Sun, Y.G., Xu, S.P., Lu, H., et al., 2003. Source facies of the Paleozoic petroleum systems in the Tabei uplift, Tarim basin, NW China: implications from aryl isoprenoids in crude oils. Organic Geochemistry, 34(4): 629-634. doi: 10.1016/S0146-6380(03)00063-9 [20] Tang, Y.J., Wang, T.G., 2007. Molecular fossils and oil-source rock correlations of Cambrian heavy oil in Tadong 2 well in Tarim basin. Journal of China University of Petroleum (Edition of Natural Science), 31(6): 18-22 (in Chinese with English abstract). http://www.researchgate.net/publication/285885680_Molecular_fossils_and_oil-source_rock_correlations_of_Cambrian_heavy_oil_in_Tadong_2_well_in_Tarim_Basin [21] Wang, C.G., Wang, T.G., Zhang, W.B., et al., 2006. Molecular geochemistry and classifications of genetic types of petroleum from Tahe oilfield of the northern Tarim basin. Acta Sedimentologica Sinica, 24(6): 901-909 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-CJXB200606017.htm [22] Wang, Z.M., Xiao, Z.Y., 2004. A review on the source rocks for the marine oils in the Tarim basin. Chinese Science Bulletin, 49(Suppl. Ⅰ): 1-8 (in Chinese). [23] Xiao, Z.Y., Huang, G.H., Lu, Y.H., et al., 2004. Origin of oils from well Tadong 2 in Tarim basin. Acta Sedimentologica Sinica, 22(Suppl. ): 66-72 (in Chinese with English abstract). [24] Xiao, Z.Y., Lu, Y.H., Sang, H., et al., 2005. A typical Cambrian oil reservoir: origin of oil reservoir in well TZ62, Tarim basin. Geochimica, 34(2): 155-160 (in Chinese with English abstract). http://d.old.wanfangdata.com.cn/Periodical/dqhx200502008 [25] Yang, C.P., Zhang, B.M., Wang, F.Y., et al., 2008. Reassessment of the Carboniferous oil pooling in Tz-4 field, the Tarim baisn. Oil & Gas Geology, 29(2): 181-188 (in Chinese with English abstract). http://www.cnki.com.cn/Article/CJFDTotal-SYYT200802004.htm [26] Zhang, S.C., Hanson, A.D., Moldowan, J.M., et al., 2000a. Paleozoic oil-source rock correlations in the Tarim basin, NW China. Organic Geochemistry, 31(4): 273-286. doi: 10.1016/S0146-6380(00)00003-6 [27] Zhang, S.C., Liang, D.G., Li, M.W., et al., 2002. Molecular fossils and oil-source rock correlations in Tarim basin, NW China. Chinese Science Bulletin, 47(suppl. ): 16-23 (in Chinese). http://www.cnki.com.cn/Article/CJFDTotal-JXTW2002S1002.htm [28] Zhang, S.C., Liang, D.G., Zhang, B.M., et al., 2004a. Marine petroleum formation in Tarim basin. Petroleum Industry Press, Beijing, 270-340 (in Chinese). [29] Zhang, S.C., Wang, Z.M., Wang, F.Y., et al., 2004b. Oil accumulation history in Tadong 2 oil reservoir in Tarim basin, NW China—a case study of oil stability and cracking. Petroleum Exploration and Development, 31(6): 25-31 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-SKYK200406006.htm [30] Zhang, S.C., Zhang, B.M., Wang, F.Y., et al., 2000b. Middle-Upper Ordovician: the main source of the oils in the Tarim basin. Marine Origin Petroleum Geology, 5(1-2): 16-22 (in Chinese). [31] Zhang, S.C., Zhang, B.M., Wang, F.Y., et al., 2001. Two main sets of marine source rocks in Tarim basin—part Ⅰ: characteristics of organic matter, developing environment and controlling factors. Advance in Natural Science, 11(3): 261-268 (in Chinese). http://www.researchgate.net/publication/288440672_Organic_properties_formation_environment_and_their_controlling_factors_of_two_effective_marine_source_rocks_in_the_Tarim_Basin [32] Zhang, W.Z., Pei, G., Guan, D.S., 1992. Aninvestigation of compound specific isotope of light hydrocarbons in Palaeozoic and Mesozoic oils in Ordos basin. Chinese Science Bulletin, 3: 248-251 (in Chinese). [33] Zhao, M.J., Huang, D.F., 1995. Preliminary discussion on carbon isotopic distribution pattern of individual hydrocarbons from crude oil and its relationship to oil-forming environment. Geochimica, 24(3): 254-260 (in Chinese with English abstract). [34] Zhao, M.J., Wang, Z.M., Pan, W.Q., et al., 2008. Lower Palaeozoic source rocks in Manjiaer sag, Tarim basin. Petroleum Exploration and Development, 35(4): 417-423 (in Chinese with English abstract). doi: 10.1016/S1876-3804(08)60089-0 [35] 陈利新, 杨海军, 邬光辉, 等, 2008. 塔中Ⅰ号坡折带奥陶系礁滩体油气藏的成藏特点. 新疆石油地质, 29(3): 327-330. https://www.cnki.com.cn/Article/CJFDTOTAL-XJSD200803016.htm [36] 陈元壮, 刘洛夫, 陈利新, 等, 2004. 塔里木盆地塔中、塔北地区志留系古油藏的油气运移. 地球科学——中国地质大学学报, 29(4): 473-482. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX200404015.htm [37] 李素梅, 庞雄奇, 金之钧, 2002. 八面河地区原油、烃源岩中甾类化合物的分布特征及其应用. 地球科学——中国地质大学学报, 27(6): 711-717. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX200206009.htm [38] 李素梅, 庞雄奇, 杨海军, 等, 2008a. 塔中Ⅰ号坡折带高熟油气地球化学特征及其意义. 石油与天然气地质, 29(2): 210-216. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT200802008.htm [39] 李素梅, 庞雄奇, 杨海军, 等, 2008b. 塔中隆起原油特征与成因类型. 地球科学——中国地质大学学报, 33(5): 635-642. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX200805009.htm [40] 李素梅, 庞雄奇, 杨海军, 等, 2009a. 塔中古生界储层中流体包裹体成分分析及其意义. 矿物岩石地球化学通报, 28(1): 34-41. https://www.cnki.com.cn/Article/CJFDTOTAL-KYDH200901007.htm [41] 李素梅, 庞雄奇, 杨海军, 2009b. 混源油气定量研究思路与方法. 地质科技情报, 28(1): 75-81. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ200901013.htm [42] 梁狄刚, 张水昌, 张宝民, 等, 2000. 从塔里木盆地看中国海相生油问题. 地学前缘, 7(4): 534-547. doi: 10.3321/j.issn:1005-2321.2000.04.023 [43] 刘洛夫, 康永尚, 1998. 运用原油吡咯类含氮化合物研究塔里木盆地塔中地区石油的二次运移. 地球化学, 27(5): 475-482. doi: 10.3321/j.issn:0379-1726.1998.05.009 [44] 孙永革, 肖中尧, 徐世平, 等, 2004. 塔里木盆地原油中芳基类异戊二烯烃的检出及其地质意义. 新疆石油地质, 25(2): 215-218. doi: 10.3969/j.issn.1001-3873.2004.02.032 [45] 唐友军, 王铁冠, 2007. 塔里木盆地塔东2井寒武系稠油分子化石与油源分析. 中国石油大学学报(自然科学版), 31(6): 18-22. doi: 10.3321/j.issn:1000-5870.2007.06.005 [46] 王传刚, 王铁冠, 张卫彪, 等, 2006. 塔里木盆地北部塔河油田原油分子地球化学特征及成因类型划分. 沉积学报, 24(6): 901-909. doi: 10.3969/j.issn.1000-0550.2006.06.018 [47] 王招明, 肖中尧, 2004. 塔里木盆地海相原油的油源问题的综合述评. 科学通报, 49(增刊Ⅰ): 1-8. https://www.cnki.com.cn/Article/CJFDTOTAL-KXTB2004S1000.htm [48] 肖中尧, 黄光辉, 卢玉红, 等, 2004. 塔里木盆地塔东2井原油成因分析. 沉积学报, 22(增刊): 66-72. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB2004S1011.htm [49] 肖中尧, 卢玉红, 桑红, 等, 2005. 一个典型的寒武系油藏: 塔里木盆地塔中62井油藏成因分析. 地球化学, 34(2): 155-160. doi: 10.3321/j.issn:0379-1726.2005.02.008 [50] 杨楚鹏, 张宝民, 王飞宇, 等, 2008. 塔里木盆地塔中4石炭系油藏成藏过程再认识. 石油与天然气地质, 29(2): 181-188. doi: 10.3321/j.issn:0253-9985.2008.02.005 [51] 张水昌, 梁狄刚, 黎茂稳, 等, 2002. 分子化石与塔里木盆地油源对比. 科学通报, 47(增刊): 16-23. https://www.cnki.com.cn/Article/CJFDTOTAL-KXTB2002S1002.htm [52] 张水昌, 梁狄刚, 张宝民, 等, 2004a. 塔里木盆地海相油气的生成. 北京: 石油工业出版社, 270-340. [53] 张水昌, 王招明, 王飞宇, 等, 2004b. 塔里木盆地塔东2油藏形成历史——原油稳定性与裂解作用实例研究. 石油勘探与开发, 31(6): 25-31. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK200406006.htm [54] 张水昌, 张宝民, 王飞宇, 等, 2000b. 中-上奥陶统: 塔里木盆地的主要油源层. 海相油气地质, 5(1-2): 16-22. https://www.cnki.com.cn/Article/CJFDTOTAL-HXYQ2000Z1008.htm [55] 张水昌, 张宝民, 王飞宇, 等, 2001. 塔里木盆地两套海相有效烃源层—Ⅰ. 有机质性质、发育环境及控制因素. 自然科学进展, 11(3): 261-268. https://www.cnki.com.cn/Article/CJFDTOTAL-ZKJZ200103006.htm [56] 张文正, 裴戈, 关德师, 1992. 鄂尔多斯盆地中、古生界原油轻烃单体系列碳同位素研究. 科学通报, 3: 248-251. https://www.cnki.com.cn/Article/CJFDTOTAL-KXTB199203016.htm [57] 赵孟军, 黄第藩, 1995. 初论原油单体烃系列碳同位素分布特征与生油环境之间的关系. 地球化学, 24(3): 254-260. doi: 10.3321/j.issn:0379-1726.1995.03.006 [58] 赵孟军, 王招明, 潘文庆, 等, 2008. 塔里木盆地满加尔凹陷下古生界烃源岩的再认识. 石油勘探与开发, 35(4): 417-423. doi: 10.3321/j.issn:1000-0747.2008.04.004 -
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