收稿日期: 2010-08-19
修回日期: 2010-10-19
网络出版日期: 2011-04-10
基金资助
国家自然科学基金项目(编号:40702021;40972134)联合资助.
Geochemical Characteristics and Sources of Natural Gas from the South Margin of Junggar Basin
Received date: 2010-08-19
Revised date: 2010-10-19
Online published: 2011-04-10
准噶尔盆地南缘天然气分布较为广泛,在3排背斜带均有分布。该区天然气在组分上以烃类为主,其中甲烷占主导;普遍含有氮气和二氧化碳。准噶尔盆地南缘天然气均为典型热成因气,主要为源自中、下侏罗统成熟—过成熟煤系烃源岩的煤成气,其中第一排背斜带和第二排背斜带天然气均为典型高—过成熟阶段煤成气,第三排背斜带独山子背斜下古近统和呼图壁背斜所有气样也是该类型,第三排背斜带其余煤成气样为典型成熟阶段煤成气。准噶尔盆地南缘煤成气普遍具有碳同位素部分倒转的特征,其主要由于同型不同源(侏罗系不同层位)气的混合,也有部分由于细菌氧化作用(古牧地背斜)或油型气和煤成气的混合(齐古和安集海)。该区油型气样品较少,目前发现的2个油型气样品位于卡因迪克油田白垩系和独山子油气田古近系,分别为成熟和高—过成熟阶段油型气,来自白垩系和二叠系腐泥型烃源岩。齐古背斜二叠系和三叠系中煤成气主要是由断裂下盘埋深较大的下侏罗统八道湾组煤系烃源岩所生成,而侏罗系中煤成气则主要来自中侏罗统西山窑组和下侏罗统三工河组烃源岩,其埋深相对较浅,成熟度相对较低,因此生成的天然气碳同位素值和甲烷含量均相对较小。
吴小奇, 黄士鹏, 廖凤蓉, 李振生 . 准噶尔盆地南缘天然气地球化学特征及来源[J]. 天然气地球科学, 2011 , 22(2) : 224 -232 . DOI: 10.11764/j.issn.1672-1926.2011.02.224
Natural gas distributes widely in all the three anticline belts in the south margin of Junggar basin.It is mainly composed of hydrocarbons, in which methane is dominated, often with nitrogen and carbon dioxide.The gas is typically thermogenic, and mainly coal-derived from Middle-Lower Jurassic mature-over mature coal\|measure source rocks.The natural gas in the first and second anticline belts, and part of the third anticline belt (Dushanzi anticline of Lower Paleogene and Hutubi anticline) is typical high-over mature coal\|derived, while that in the other part of the third anticline belt is typical mature coal-derived.The coal\|derived gas in the south margin of Junggar basin shows partially reversal of carbon isotopes, mainly due to the mixing of the same type gas with different sources (different strata of Jurassic), and partially due to the bacterial oxidation (in the Gumudi anticline) or the mixing with oil-associated gas (in the Qigu and Anjihai anticlines).The oil-associated gas of this area is only in the Cretaceous Kayindike oil field and Paleogene Dushanzi oil & gas field, and sourced from mature Cretaceous sapropelic source rocks and high\|over mature Permian sapropelic source rocks respectively.The Qigu coal\|derived gas of the Permian and Triassic is mainly derived from the Lower Jurassic Badaowan Formation coal-measure source rocks deep-seated in the footwall of the fault.while that of the Jurassic is mainly derived from the Middle Jurassic Xishanyao Formation and Lower Jurassic Sangonghe Formation source rocks buried shallower with relatively lower maturity and therefore has relatively lower carbon isotope value and methane content.
Key words: Junggar basin; South margin; Anticline belt; Coal-derived gas; Carbon isotope; Source
[1]Wei Yuanjiang,Zhang Yijie,Dong Dazhong,et al.Current situation of natural gas exploration and its countermeasures in Junggar basin[J].Petroleum Exploration and Development,2006,33(3):267-273.[蔚远江,张义杰,董大忠,等.准噶尔盆地天然气勘探现状及勘探对策[J].石油勘探与开发,2006,33(3):267-273.]
[2]Da Jiang,Hu Yong,Zhao Mengjun,et al.Analysis of oil-gas source characteristics and reservoirs of Kelameili gas field in Junggar basin[J].Oil & Gas Geology,2010,31(2):187-192.[达江,胡咏,赵孟军,等.准噶尔盆地克拉美丽气田油气源特征及成藏分析[J].石油与天然气地质,2010,31(2):187-192.]
[3]Schoell M.The hydrogen and carbon isotopic composition of methane from natural gases of various origins[J].Geochimica et Cosmochimica Acta,1980,44(5):649-661.[4]Dai Jinxing,Pei Xigu,Qi Houfa.Natural Gas Geology in China:Vol.1 [M].Beijing:Petroleum Industry Press,1992:1-149.[戴金星,裴锡古,戚厚发.中国天然气地质学:卷一[M].北京:石油工业出版社,1992:1-149.]
[5]Dai J.Identification and distinction of various alkane gases[J].Science in China:Series B,Chemistry,1992,35(10):1246-1257.
[6]Rooney M A,Claypool G E,Moses Chung H.Modeling thermogenic gas generation using carbon isotope ratios of natural gas hydrocarbons[J].Chemical Geology,1995,126(3/4):219-232.
[7]Prinzhofer A A,Huc A Y.Genetic and post-genetic molecular and isotopic fractionations in natural gases[J].Chemical Geology,1995,126(3/4):281-290.
[8]Whiticar M J.Carbon and hydrogen isotope systematics of bacterial formation and oxidation of methane[J].Chemical Geology,1999,161(1/3):291-314.
[9]Zou Y R,Cai Y,Zhang C,et al.Variations of natural gas carbon isotope-type curves and their interpretation:A case study[J].Organic Geochemistry,2007,38(8):1398-1415.[10]Song Yan.Geological Characteristics of Natural Gas Accumulation Zones in Junggar Basin[M].Beijing:Petroleum Industry Press,1995:1-172.[宋岩.准噶尔盆地天然气聚集区带地质特征[M].北京:石油工业出版社,1995:1-172.]
[11]Wang Yutao,Jiang Shaobin.Characteristics of vertical migration of the natural gas and analyses of its origin in the southern margin of the Junggar basin[J].Acta Sedimentologica Sinica,1997,15(2):70-74.[王屿涛,蒋少斌.准噶尔盆地南缘天然气垂向运移特征及成因分析[J].沉积学报,1997,15(2):70-74.]
[12]Wang Yutao,Gu Bin,Wang Lihong.Pool-forming history of oil and gas in south margin of Junggar basin[J].Oil & Gas Geology,1998,19(4):291-295.[王屿涛,谷斌,王立宏.准噶尔盆地南缘油气成藏聚集史[J].石油与天然气地质,1998,19(4):291-295.]
[13]Wang Yutao.Selected Works of Oil & Gas Generation and Distribution in Junggar Basin[M].Beijing:Petroleum Industry Press,2003:1-293.[王屿涛.准噶尔盆地油气形成与分布论文集[M].北京:石油工业出版社,2003:1-293.]
[14]Zheng Jianjing,Ji Liming,Meng Qianxiang.Discussion on geochemical characteristics and accumulation conditions of natural gas in Junggar basin[J].Natural Gas Geoscience,2000,11(5):17-21.[郑建京,吉利明,孟仟祥.准噶尔盆地天然气地球化学特征及聚气条件的讨论[J].天然气地球科学,2000,11(5):17-21.]
[15]Li Yanjun,Wang Tingdong,Zhang Yanyun,et al.Natural gas genesis and formation of gas pools in the south margin of Junggar basin[J].Acta Sedimentologica Sinica,2004,22(3):529-534.[李延钧,王廷栋,张艳云,等.准噶尔盆地南缘天然气成因与成藏解剖[J].沉积学报,2004,22(3):529-534.]
[16]Li Jian,Jiang Zhenglong,Luo Xia,et al.Geochemical characteristics of coal-measure source rocks and coal-derived gas in Junggar basin,NW China[J].Petroleum Exploration and Development,2009,36(3):365-374.[李剑,姜正龙,罗霞,等.准噶尔盆地煤系烃源岩及煤成气地球化学特征[J].石油勘探与开发,2009,36(3):365-374.]
[17]Dai J,Xia X,Qin S,et al.Origins of partially reversed alkane δ13C values for biogenic gases in China[J].Organic Geochemistry,2004,35(4):405-411.
[18]Xiao Xuchang,Tang Yaoqing,Feng Yimin,et al.Tectonic Evolution of Northern Xinjiang and Its Adjacent Regions[M].Beijing:Geological Publishing House,1992:1-169.[肖序常,汤耀庆,冯益民,等.新疆北部及其邻区大地构造[M].北京:地质出版社,1992:1-169.]
[19]Li Tiejun.Overpressure and its generation in south edge of the Junggar basin[J].Chinese Journal of Geology,2004,39(2):234-244.[李铁军.准噶尔盆地南缘异常高压及其成因机制初探[J].地质科学,2004,39(2):234-244.]
[20]Chen Shuping,Qi Jiafu,Yu Fusheng,et al.Deformation characteristics in the southern margin of the Junggar basin and their controlling factors[J].Acta Geologica Sinica,2007,81(2):151-157.[陈书平,漆家福,于福生,等.准噶尔盆地南缘构造变形特征及其主控因素[J].地质学报,2007,81(2):151-157.][JP]
[21]Wei Dongtao,Jia Dong,Zhao Yingcheng,et al.The formation of Cretaceous source derived oils in the southern Junggar basin,NW China[J].Geological Review,2008,54(3):399-408.[魏东涛,贾东,赵应成,等.准噶尔盆地南缘白垩系原油成藏特征[J].地质论评,2008,54(3):399-408.]
[22]Dai Jinxing.Selected Works of Natural Gas Geology and Geochemistry:Vol.1[M].Beijing:Petroleum Industry Press,1998:1-273.[戴金星.天然气地质和地球化学论文集:卷一[M].北京:石油工业出版社,1998:1-273.]
[23]Dai Jinxing,Ni Yunyan,Li Jian,et al.Carbon isotope types and significances of alkane gases from Junggar basin and Tarim basin[J].Xinjiang Petroleum Geology,2008,29(4):403-410.[戴金星,倪云燕,李剑,等.塔里木盆地和准噶尔盆地烷烃气碳同位素类型及其意义[J].新疆石油地质,2008,29(4):403-410.]
[24]Kuang Jun,Liu Deguang,Chen Xin.Reservoir disciplines and exploration directions of natural gas in Junggar basin[J].Petroelum Explorationist,1999,4(2):28-32.[况军,刘得光,陈新.准噶尔盆地天然气成藏规律与勘探方向[J].勘探家,1999,4(2):28-32.]
[25]Krooss B M,Littke R,Muller B,et al.Generation of nitrogen and methane from sedimentary organic matter:Implications on the dynamics of natural gas accumulations[J].Chemical Geology,1995,126(3/4):291-318.
[26]Dai J,Song Y,Dai C,et al.Geochemistry and accumulation of carbon dioxide gases in China[J].AAPG Bulletin,1996,80(10):1615-1626.
[27]Dai J,Yang S,Chen H,et al.Geochemistry and occurrence of inorganic gas accumulations in Chinese sedimentary basins[J].Organic Geochemistry,2005,36(12):1664-1688.
[28]Fu Jiamo,Liu Dehan,Sheng Guoying.Coal-derived Hydrocarbon Geochemistry[M].Beijing:Science Press,1990:1-371.[傅家谟,刘德汉,盛国英.煤成烃地球化学[M].北京:科学出版社,1990:1-371.]
[29]Dai Jinxing,Qin Shengfei,Tao Shizhen,et al.Development trends of natural gas industry and the significant progress on natural gas geological theories in China[J].Natural Gas Geoscience,2005,16(2):127-142.[戴金星,秦胜飞,陶士振,等.中国天然气工业发展趋势和天然气地学理论重要进展[J].天然气地球科学,2005,16(2):127-142.]
[30]Dai Jinxing.Significant advancement in research on coal-derived gas in China[J].Petroleum Exploration and Development,1999,26(3):1-10.[戴金星.中国煤成气研究二十年的重大进展[J].石油勘探与开发,1999,26(3):1-10.]
[31]Chung M H,Gormly J R,Squires R M.Origin of gaseous hydrocarbons in subsurface environments:Theoretical consideration of carbon isotope distribution[J].Chemical Geology,1988,71(1/4):97-103.
[32]Galimov E M.Isotope organic geochemistry[J].Organic Geochemistry,2006,37(10):1200-1262.
[33]Dai J,Ni Y,Zou C,et al.Stable carbon isotopes of alkane gases from the Xujiahe coal measures and implication for gas-source correlation in the Sichuan basin,SW China[J].Organic Geochemistry,2009,40(5):638-646.
[34]Wu Xiaoqi,Huang Shipeng,Liao Fengrong,et al.Carbon isotopic characteristics of coal-derived gas in Xujiahe Formation and Jurassic in the Sichuan basin[J].Petroleum Exploration and Development,2011,in press.[吴小奇,黄士鹏,廖凤蓉,等.四川盆地须家河组和侏罗系中煤成气碳同位素特征[J].石油勘探与开发,2011,待刊.]
[35]Zhang Guojun.Xinjiang Oil & Gas District(Vol.1) Junggar Basin[M]//Zhai Guangming.Petroleum Exploration in China(vol.15).Beijing:Petroleum Industry Press,1993:1-390.[张国俊.新疆油气区(上册)准噶尔盆地[M]//翟光明主编.中国石油地质志:卷十五.北京:石油工业出版社,1993:1-390.]
[36]Ding A N,Hui R Y,Zhang Z N.Hydrocarbon potential of Jurassic source rocks in the Junggar basin,NW China[J].Journal of Petroleum Geology,2003,26(3):307-324.
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