西藏措勤盆地它日错地区多尼组烃源岩生物标志物特征
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摘要
运用质谱色谱技术,对采自西藏措勤盆地它日错地区多尼组烃源岩生物标志物的有机质生源构成、沉积环境和成熟度进行了分析。分析结果表明:西藏措勤盆地它日错地区多尼组烃源岩的碳数值分布在nC_(15)~nC_(33),以"前峰型"单峰为主。正构烷烃碳数相对较高,表明遭受了一定程度的微生物降解;样品中检测出了伽马蜡烷且Pr/Ph值约为0.80,反映了较咸水还原的沉积环境;三环萜烷/五环三萜值小于1,且规则甾烷以C_(27)略占优势,说明有机母质主要来源于水生低等藻类生物,部分有机质具有混合来源;成熟度参数OEP为0.99~1.61,平均1.16,Ts/(Tm+Ts)为0.47~0.67,C_(29)-β/(αα+ββ)值为0.32~0.54及C_(29)-20S/20(S+R)值为0.31~0.49,显示多尼组烃源岩有机质热演化程度已达到高成熟阶段。
The organic matter composition,sedimentary environment and maturity of the biomarkers of Duoni Formation source rocks from the Taricuo area in the Cuoqin Basin,Tibet,were analyzed by mass spectrometry. The results show: the carbon number distribution of the source rocks in Duoni Formation in the Cuoqin Basin,Tibet,is mainly in nC_(15)~ nC_(33),with the"front peak type"single peak. The number of n-alkanes is relatively high,indicating a certain degree of microbial degradation. Gammacerane and the Pr/Ph value of about 0. 80 are detected,reflecting the depositional environment of saltwater reduction. Tricyclic terpane/pentacyclic triterpene value is less than 1,and the regular sterane to C_(27) slightly dominant,indicating that the organic parent material is mainly derived from aquatic low algae biological,part of the organic matter with a mixed source. The maturity parameter OEP is 0. 99 ~ 1. 61 on average 1. 16,Ts/( Tm + Ts) is 0. 47 ~ 0. 67,C_(29)-β/( αα + ββ) is 0. 32 ~ 0. 54 and C_(29)-20 S/20( S + R) is 0. 31 ~ 0. 49,indicating that the thermal evolution of the organic matter of the source rocks of Duoni Formation has reached the high maturity stage.
The organic matter composition,sedimentary environment and maturity of the biomarkers of Duoni Formation source rocks from the Taricuo area in the Cuoqin Basin,Tibet,were analyzed by mass spectrometry. The results show: the carbon number distribution of the source rocks in Duoni Formation in the Cuoqin Basin,Tibet,is mainly in nC_(15)~ nC_(33),with the"front peak type"single peak. The number of n-alkanes is relatively high,indicating a certain degree of microbial degradation. Gammacerane and the Pr/Ph value of about 0. 80 are detected,reflecting the depositional environment of saltwater reduction. Tricyclic terpane/pentacyclic triterpene value is less than 1,and the regular sterane to C_(27) slightly dominant,indicating that the organic parent material is mainly derived from aquatic low algae biological,part of the organic matter with a mixed source. The maturity parameter OEP is 0. 99 ~ 1. 61 on average 1. 16,Ts/( Tm + Ts) is 0. 47 ~ 0. 67,C_(29)-β/( αα + ββ) is 0. 32 ~ 0. 54 and C_(29)-20 S/20( S + R) is 0. 31 ~ 0. 49,indicating that the thermal evolution of the organic matter of the source rocks of Duoni Formation has reached the high maturity stage.
引文
1李亚林,黄永建,王成善,等.西藏措勤盆地白垩系白云岩地球化学特征及其成因分析.岩石学报,2008;24(3):609-615Li Yalin,Huang Yongjian,Wang Chengshan,et al.Geochemical characteristics and genetic analysis of the Cretaceous dolomite in Cuoqin Basin,Qinghai-Tibet Plateau.Acta Petrologica Sinica,2008;24(3):609-615
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3王剑.青藏高原重点沉积盆地油气资源潜力分析.北京:地质出版社,2004Wang Jian.Evaluation of oil and gas resources in key sedimentary basins of the Qinghai-Tibet Plateau.Beijing:Geological Publishing House,2004
4吴孔友,陈清华,洪梅.青藏地区措勤盆地它日错深凹陷主含油气系统.中国石油大学学报(自然科学版),1999;23(4):13-15Wu Kongyou,Chen Qinghua,Hong Mei.The main oil and gas system in the Cuoqin Basin of the Qinghai-Tibet region.Journal of China University of Petroleum(Edition of Natural Sciences),1999;23(4):13-15
5任拥军,宋全友.青藏措勤盆地下白垩统烃源岩中可溶有机质的地球化学特征.地质与勘探,2000;36(4):64-68Ren Yongjun,Song Quanyou.Geochemical characteristics of the soluble organic matter in the Lower Crectaceous potential source rocks in Cuoqin Basin,Qingzang Plateau.Geology and Prospecting,2000;36(4):64-68
6王纪祥,陈清华,任拥军.西藏措勤盆地油气成藏条件分析.地球科学进展,2003;18(2):312-316Wang Jixiang,Chen Qinghua,Ren Yongjun.Conditions for the formation of oil and gas pool in Cuoqin Basin.Advance in Earth Sciences,2003;18(2):312-316
7王冠民.西藏措勤盆地下白垩统郎山组沉积特征及其石油地质条件.沉积学报,2000;18(3):349-354Wang Guanmin.Depositional features and petroleum geological conditions of Langshan Formation in Cuoqin Basin,Tibet.Acta Sedimemtologica Sinica,2000;18(3):349-354
8王立成,王成善,李亚林,等.西藏措勤盆地色林错凹陷郎山组分子地球化学特征.沉积学报,2009;27(6):1199-1207Wang Licheng,Wang Chengshan,Li Yalin,et al.Molecular organic geochemistry of Langshan Formationin Selincuo Sag,Cuoqin Basin,Central Tibet,China.Acta Sedimentologica Sinica,2009;27(6):1199-1207
9郑春子,曲永贵,张树岐,等.西藏北部雄梅-曲松波地区早白垩世多尼组及沉积环境探讨.地质论评,2003;(6):638-645Zhen Chunzi,Qu Yonggui,Zhang Shuqi,et al.On the Lithostratigraphy and sedmentary environment of the Lower Gretaceous Duoni Formation in the Xiongmei and Qusongbo areas,northern Tibek.Geological Review,2003;(6):638-645
10康志强,许继峰,王保弟,等.拉萨地块北部白垩纪多尼组火山岩的地球化学:形成的构造环境.地球科学:中国地质大学学报,2009;(1):89-104Kang Zhiqiang,Xu Jifeng,Wang Baodi,et al.Geochemistry of cretaceous volcanic rocks of Duoni Formation in northern Lhasa Block:discussion of tectonic setting.Earth Science-Journal of China University of Geosciences,2009;(1):89-104
11赵香玲.西藏色林错地区下白垩统多尼组沉积特征分析与储层评价.成都:成都理工大学,2016Zhao Xiangling.Sedimentary characteristics and reservoir evaluation of the Duoni Formation,Lower Cretaceous in the Selincuo area,Tibet.Chengdu:Chengdu University of Technology,2016
12赵政璋,李永铁,叶和飞,等.青藏高原海相烃源层的油气生成.北京:科学出版社,2000Zhao Zhengzhang,Li Yongtie,Ye Hefei,et al.Oil and gas generation in the marine source layer of the Qinghai-Tibet Plateau.Beijing:Science Press,2000
13西藏地质矿产局.西藏自治区岩石地层.武汉:中国地质大学出版社,1997Tibet Geology and Mineral Resources Bureau.Rock stratigraphy of the Tibet autonomous region.Wuhan:China University of Geosciences,1997
14林良彪,伍新和.西藏措勤盆地中生界石油地质条件分析.石油实验地质,2010;32(4):348-352Lin Liangbiao,Wu Xinhe.Petroleum geology condition analysis on the Mesozoic of the Cuoqin Basin in Tibet.Petroleum Geology and Experiment,2010;32(4):348-352
15 Chosson P,Connan J,Dessort D,et al.In vitro biodegradation of steranes and terpanes:a clue to understanding geological situations.Englewood Cliffs:Biological Markers in Sediments and Petroleum,1992
16 Peters K E,Walters C C,Moldowan J M.The biomarker guide:biomarkers and isotopes in the environment and human history.London:Cambridge University Press,2005
17唐友军,马忠梅,蒋兴超.内蒙古扎鲁特盆地陶海营子剖面林西组烃源岩生物标志化合物特征及意义.地质通报,2013;32(8):1315-1321Tang Youjun,Ma Zhongmei,Jiang Xingchao.Characteristics and significance of biomarker compounds of Linxi Formation hydrocarbon source rocks along Taohaiyingzi section in Zhalute Basin,Inner Mongolia.Geological Bulletin of China,2013;32(8):1315-1321
18程克明.烃源岩地球化学.北京:科学出版社,1995Cheng Keming.Geochemistry of source rocks.Beijing:Science Press,1995
19卢双舫,张敏.油气地球化学.北京:石油工业出版社,2008Lu Shuangfang,Zhang Min.Oil and gas geochemistry.Beijing:Petroleum Industry Press,2008
20梅博文,刘希江.我国原油中异戊间二烯烷烃的分布及其与地质环境的关系.石油与天然气地质,1980;1(2):99-115Mei Bowen,Liu Xijiang.The distribution of isoprenoid alkanes in China’s crude oil and its relation with the geologic environment.Oil and Gas Geology,1980;1(2):99-115
21卢双舫,李冬,王跃文,等.倾油性有机质生成轻质油的评价方法及其应用.石油学报,2007;(5):63-66Lu Shuangfang,Li Dong,Wang Yuewen,et al.Resource evaluation method for generating condensate oil and light oil from sapropelic organic matter and its application.Acta Petrolei Sinica,2007;(5):63-66
22周光甲.陆相块断湖盆油气生成的地球化学模式.石油与天然气地质,1992;13(4):359-370Zhou Guangjia.Geochemical model of oil-gas generation in continental faulted Basin.Oil and Gas Geology,1992;13(4):359-370
23张水昌.南方海相地层中生物标志物---细菌和藻类生物的贡献.北京:石油工业出版社,1993Zhang Shuichang.Biomarkers in the marine strata of the south contribution of bacteria and algae organisms.Beijing:Petroleum Industry Press,1993
24孟仟祥,房嬛,徐永昌,等.柴达木盆地石炭系烃源岩和煤岩生物标志物特征及其地球化学意义.沉积学报,2004;22(4):729-736Meng Qianxiang,Fang Huan,Xu Yongchang,et al.Biomarkers and geochemical significance of Carboniferous source rocks and coals from Qaidam Basin.Acta Sedimentologica Sinica,2004;22(4):729-736
25 Peters K E,Moldowan J M.Guide for the application of biological markers.Upper Saddle River:Prentice Hall,1993
26张晓芳.西藏措勤盆地石炭系-二叠系烃源岩有机地球化学特征研究.北京:中国地质大学,2012Zhang Xiaofang.Geochemical characteristics of Paleozoic hydrocarbon source rocks in Cuoqin Basin,Tibet.Beijing:China University of Geosciences,2012
27张立平,黄第藩,廖志勤,等.伽马蜡烷---水体分层的地球化学标志.沉积学报,1999;17(1):136-140Zhang Liping,Huang Difan,Liao Zhiqin,et al.Gammaceranegeochemical indicator of water column stratification.Acta Sedimentologica Sinica,1999;17(1):136-140
28 Huang W Y,Meinschein W G.Sterols as ecological indicators.Geochimica et Cosmochimica Acta,1979;43(5):739-745
29 Mackenzie A S,Patience R L,Maxwell J R,et al.Molecular parameters of maturation in the Toarcian shales,Paris Basin,FranceI.changes in the configurations of acyclic isoprenoid alkanes,steranes and triterpanes.Geochimica et Cosmochimica Acta,1980;44(11):1709-1721
30 Seifert W K,Moldowan J M.Use of biological markers in petroleum exploration.Methods in Geochemistry&Geophysics,1986;24:261-290
2李亚林,王成善,朱利东,等.西藏措勤盆地下白垩统郎山组白云岩储层的发现及其油气地质意义.地质通报,2008;27(3):426-428Li Yalin,Wang Chengshan,Zhu Lidong,et al.Discovery of the dolomite reservoir in the Lower Cretaceous Langshan Formation,Cuoqin Basin,Tibet,China.Geological Bulletin of China,2008;27(3):426-428
3王剑.青藏高原重点沉积盆地油气资源潜力分析.北京:地质出版社,2004Wang Jian.Evaluation of oil and gas resources in key sedimentary basins of the Qinghai-Tibet Plateau.Beijing:Geological Publishing House,2004
4吴孔友,陈清华,洪梅.青藏地区措勤盆地它日错深凹陷主含油气系统.中国石油大学学报(自然科学版),1999;23(4):13-15Wu Kongyou,Chen Qinghua,Hong Mei.The main oil and gas system in the Cuoqin Basin of the Qinghai-Tibet region.Journal of China University of Petroleum(Edition of Natural Sciences),1999;23(4):13-15
5任拥军,宋全友.青藏措勤盆地下白垩统烃源岩中可溶有机质的地球化学特征.地质与勘探,2000;36(4):64-68Ren Yongjun,Song Quanyou.Geochemical characteristics of the soluble organic matter in the Lower Crectaceous potential source rocks in Cuoqin Basin,Qingzang Plateau.Geology and Prospecting,2000;36(4):64-68
6王纪祥,陈清华,任拥军.西藏措勤盆地油气成藏条件分析.地球科学进展,2003;18(2):312-316Wang Jixiang,Chen Qinghua,Ren Yongjun.Conditions for the formation of oil and gas pool in Cuoqin Basin.Advance in Earth Sciences,2003;18(2):312-316
7王冠民.西藏措勤盆地下白垩统郎山组沉积特征及其石油地质条件.沉积学报,2000;18(3):349-354Wang Guanmin.Depositional features and petroleum geological conditions of Langshan Formation in Cuoqin Basin,Tibet.Acta Sedimemtologica Sinica,2000;18(3):349-354
8王立成,王成善,李亚林,等.西藏措勤盆地色林错凹陷郎山组分子地球化学特征.沉积学报,2009;27(6):1199-1207Wang Licheng,Wang Chengshan,Li Yalin,et al.Molecular organic geochemistry of Langshan Formationin Selincuo Sag,Cuoqin Basin,Central Tibet,China.Acta Sedimentologica Sinica,2009;27(6):1199-1207
9郑春子,曲永贵,张树岐,等.西藏北部雄梅-曲松波地区早白垩世多尼组及沉积环境探讨.地质论评,2003;(6):638-645Zhen Chunzi,Qu Yonggui,Zhang Shuqi,et al.On the Lithostratigraphy and sedmentary environment of the Lower Gretaceous Duoni Formation in the Xiongmei and Qusongbo areas,northern Tibek.Geological Review,2003;(6):638-645
10康志强,许继峰,王保弟,等.拉萨地块北部白垩纪多尼组火山岩的地球化学:形成的构造环境.地球科学:中国地质大学学报,2009;(1):89-104Kang Zhiqiang,Xu Jifeng,Wang Baodi,et al.Geochemistry of cretaceous volcanic rocks of Duoni Formation in northern Lhasa Block:discussion of tectonic setting.Earth Science-Journal of China University of Geosciences,2009;(1):89-104
11赵香玲.西藏色林错地区下白垩统多尼组沉积特征分析与储层评价.成都:成都理工大学,2016Zhao Xiangling.Sedimentary characteristics and reservoir evaluation of the Duoni Formation,Lower Cretaceous in the Selincuo area,Tibet.Chengdu:Chengdu University of Technology,2016
12赵政璋,李永铁,叶和飞,等.青藏高原海相烃源层的油气生成.北京:科学出版社,2000Zhao Zhengzhang,Li Yongtie,Ye Hefei,et al.Oil and gas generation in the marine source layer of the Qinghai-Tibet Plateau.Beijing:Science Press,2000
13西藏地质矿产局.西藏自治区岩石地层.武汉:中国地质大学出版社,1997Tibet Geology and Mineral Resources Bureau.Rock stratigraphy of the Tibet autonomous region.Wuhan:China University of Geosciences,1997
14林良彪,伍新和.西藏措勤盆地中生界石油地质条件分析.石油实验地质,2010;32(4):348-352Lin Liangbiao,Wu Xinhe.Petroleum geology condition analysis on the Mesozoic of the Cuoqin Basin in Tibet.Petroleum Geology and Experiment,2010;32(4):348-352
15 Chosson P,Connan J,Dessort D,et al.In vitro biodegradation of steranes and terpanes:a clue to understanding geological situations.Englewood Cliffs:Biological Markers in Sediments and Petroleum,1992
16 Peters K E,Walters C C,Moldowan J M.The biomarker guide:biomarkers and isotopes in the environment and human history.London:Cambridge University Press,2005
17唐友军,马忠梅,蒋兴超.内蒙古扎鲁特盆地陶海营子剖面林西组烃源岩生物标志化合物特征及意义.地质通报,2013;32(8):1315-1321Tang Youjun,Ma Zhongmei,Jiang Xingchao.Characteristics and significance of biomarker compounds of Linxi Formation hydrocarbon source rocks along Taohaiyingzi section in Zhalute Basin,Inner Mongolia.Geological Bulletin of China,2013;32(8):1315-1321
18程克明.烃源岩地球化学.北京:科学出版社,1995Cheng Keming.Geochemistry of source rocks.Beijing:Science Press,1995
19卢双舫,张敏.油气地球化学.北京:石油工业出版社,2008Lu Shuangfang,Zhang Min.Oil and gas geochemistry.Beijing:Petroleum Industry Press,2008
20梅博文,刘希江.我国原油中异戊间二烯烷烃的分布及其与地质环境的关系.石油与天然气地质,1980;1(2):99-115Mei Bowen,Liu Xijiang.The distribution of isoprenoid alkanes in China’s crude oil and its relation with the geologic environment.Oil and Gas Geology,1980;1(2):99-115
21卢双舫,李冬,王跃文,等.倾油性有机质生成轻质油的评价方法及其应用.石油学报,2007;(5):63-66Lu Shuangfang,Li Dong,Wang Yuewen,et al.Resource evaluation method for generating condensate oil and light oil from sapropelic organic matter and its application.Acta Petrolei Sinica,2007;(5):63-66
22周光甲.陆相块断湖盆油气生成的地球化学模式.石油与天然气地质,1992;13(4):359-370Zhou Guangjia.Geochemical model of oil-gas generation in continental faulted Basin.Oil and Gas Geology,1992;13(4):359-370
23张水昌.南方海相地层中生物标志物---细菌和藻类生物的贡献.北京:石油工业出版社,1993Zhang Shuichang.Biomarkers in the marine strata of the south contribution of bacteria and algae organisms.Beijing:Petroleum Industry Press,1993
24孟仟祥,房嬛,徐永昌,等.柴达木盆地石炭系烃源岩和煤岩生物标志物特征及其地球化学意义.沉积学报,2004;22(4):729-736Meng Qianxiang,Fang Huan,Xu Yongchang,et al.Biomarkers and geochemical significance of Carboniferous source rocks and coals from Qaidam Basin.Acta Sedimentologica Sinica,2004;22(4):729-736
25 Peters K E,Moldowan J M.Guide for the application of biological markers.Upper Saddle River:Prentice Hall,1993
26张晓芳.西藏措勤盆地石炭系-二叠系烃源岩有机地球化学特征研究.北京:中国地质大学,2012Zhang Xiaofang.Geochemical characteristics of Paleozoic hydrocarbon source rocks in Cuoqin Basin,Tibet.Beijing:China University of Geosciences,2012
27张立平,黄第藩,廖志勤,等.伽马蜡烷---水体分层的地球化学标志.沉积学报,1999;17(1):136-140Zhang Liping,Huang Difan,Liao Zhiqin,et al.Gammaceranegeochemical indicator of water column stratification.Acta Sedimentologica Sinica,1999;17(1):136-140
28 Huang W Y,Meinschein W G.Sterols as ecological indicators.Geochimica et Cosmochimica Acta,1979;43(5):739-745
29 Mackenzie A S,Patience R L,Maxwell J R,et al.Molecular parameters of maturation in the Toarcian shales,Paris Basin,FranceI.changes in the configurations of acyclic isoprenoid alkanes,steranes and triterpanes.Geochimica et Cosmochimica Acta,1980;44(11):1709-1721
30 Seifert W K,Moldowan J M.Use of biological markers in petroleum exploration.Methods in Geochemistry&Geophysics,1986;24:261-290