天然气地质学

川西坳陷新场气田上三叠统须五段天然气来源及启示

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  • 1.中国石化石油勘探开发研究院无锡石油地质研究所,江苏 无锡 214126;2.中国石化石油勘探开发研究院,北京 100083;3.中国石化西南油气分公司勘探开发研究院,四川 成都 610041
吴小奇(1982-),男,江苏盐城人,高级工程师,博士,主要从事天然气地质与地球化学研究. E-mail:xqwu@163.com.

收稿日期: 2016-01-16

  修回日期: 2016-01-25

  网络出版日期: 2019-09-11

基金资助

国家自然科学基金项目(编号:U1663201;41302118;41322016)联合资助.

The source of natural gas reservoired in the 5th member of the Upper Triassic Xujiahe Formation in Xinchang Gasfield,the Western Sichuan Depression and its implication

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  • 1.Wuxi Research Institute of Petroleum Geology,Research Institute of Petroleum Exploration and Production,SINOPEC,Wuxi 214126,China;
    2.Research Institute of Petroleum Exploration and Production,SINOPEC,Beijing 100083,China;
    3.Exploration and Development Research Institute,Southwest Branch Company,SINOPEC,Chengdu 610041,China

Received date: 2016-01-16

  Revised date: 2016-01-25

  Online published: 2019-09-11

摘要

新场气田是川西坳陷目前发现的规模最大的陆相气田,须五段是该区天然气勘探的重点层系之一,但有关须五段天然气成因和来源的认识存在分歧。在对新场气田不同层位天然气进行组分、稳定碳氢同位素和轻烃化合物组成进行测试分析的基础上,开展天然气成因鉴别和气源对比。地球化学特征研究表明,新场气田须五段天然气主体为湿气,δ13C1值介于-40.2‰~-33.5‰之间,δ13C2值介于-27.3‰~-23.6‰之间,δD1值介于-215‰~-179‰之间,烷烃气碳氢同位素组成均为正序系列;C7组成具有明显的甲基环己烷优势分布,C5-7组成则以异构烷烃和环烷烃为主。新场气田须五段天然气为煤成气,与雷口坡组和须二段分别表现为油型气和混合气的特征明显不同,而侏罗系和须四段天然气尽管同样表现出煤成气特征,但其成熟度普遍高于须五段天然气。受须家河组不同层段烃源岩母质类型相似等因素影响,气—岩轻烃指纹对比不具有排他性,不适用于新场气田陆相天然气的气源精细对比。新场须五段天然气主要来自须五段自身,而侏罗系天然气则主要来自须三段、须四段烃源岩。

本文引用格式

吴小奇, 王萍, 刘全有, 黎华继, 陈迎宾, 曾华盛, 赵国伟 . 川西坳陷新场气田上三叠统须五段天然气来源及启示[J]. 天然气地球科学, 2016 , 27(8) : 1409 -1418 . DOI: 10.11764/j.issn.1672-1926.2016.08.1409

Abstract

The Xinchang Gasfield is the largest terrestrial gasfield in the Western Sichuan Depression,and the 5th member of the Upper Triassic Xujiahe Formation(T3x5) is one of the important strata for natural gas exploration in this area.However,there was no consensus on the origin and source of T3x5 gases.The identification of gas origin and gas-source correlation were conducted based on the measurement and analyses of chemical composition,stable carbon and hydrogen isotopes and light hydrocarbons.The study on geochemical characteristics indicated that,the gas was mainly wet with δ13C113C2 and δD1 values being -40.2‰ to -33.5‰,-27.3‰ to -23.6‰ and -215‰ to -179‰,respectively,and the gaseous alkanes displayed positive carbon and hydrogen isotopic series,and the C7 light hydrocarbons were dominated by methyl cyclohexane with the C5-7 light hydrocarbons mainly consisting of isoalkanes and n-alkanes.The T3x5 gas was coal-derived gas and different from oil-type gas and mixed gas reservoired in T2l and T3x2,respectively.The Jurassic and T3x4 gas also display the characteristics of coal-derived gas with generally higher maturity.The T3x5 gas in the Xinchang Gasfield was mainly derived from source rocks in T3x5 itself,whereas the Jurassic gas was probably derived mainly from the source rocks in T3x3 and T3x4.

参考文献

[1]Wang Peng,Shen Zhongmin,Liu Sibing,et al.The geochemical characteristics and comparison of the terrestrial natural gas in Sichuan Basin[J].Natural Gas Geoscience,2013,24(6):1186-1195.[王鹏,沈忠民,刘四兵,等.四川盆地陆相天然气地球化学特征及对比[J].天然气地球科学,2013,24(6):1186-1195.]
[2]Liao Fengrong,Yu Cong,Wu Wei,et al.Stable carbon and hydrogen isotopes of natural gas from the Zhongba Gasfield in the Sichuan Basin and implication for gas-source correlation[J].Natural Gas Geoscience,2014,25(1):79-86.[廖凤蓉,于聪,吴伟,等.四川盆地中坝气田天然气碳、氢同位素特征及气源探讨[J].天然气地球科学,2014,25(1):79-86.]
[3]Yin Feng,Liu Ruobing,Wang Wei,et al.Geochemical characters of the tight sandstone gas from Xujiahe Formation in Yuanba Gasfield and its gas source[J].Natural Gas Geoscience,2013,24(3):621-627.[印峰,刘若冰,王威,等.四川盆地元坝气田须家河组致密砂岩气地球化学特征及气源分析[J].天然气地球科学,2013,24(3):621-627.]
[4]Chen Yicai,Guo Guian,Jiang Yuqiang,et al.Geochemical features of natural gas and the process of Upper Trassic hydrocarbon accumulation in middle Sichuan area[J].Natural Gas Geoscience,2007,18(5):737-742.[陈义才,郭贵安,蒋裕强,等.川中地区上三叠统天然气地球化学特征及成藏过程探讨[J].天然气地球科学,2007,18(5):737-742.]
[5]Bai Fan,Wu Xiaoqi,Zeng Huasheng,et al.Genetic types and sources of natural gases reservoired in the second member of the Xujiahe Formation in the Xinchang area of the Western Sichuan Depression[J].Petroleum Geology & Experiment,2015,37(5):633-640.[白帆,吴小奇,曾华盛,等.川西新场地区须二段天然气成因类型和来源[J].石油实验地质,2015,37(5):633-640.]
[6]Dai J X,Ni Y Y,Zou C N.Stable carbon and hydrogen isotopes of natural gases sourced from the Xujiahe Formation in the Sichuan Basin,China[J].Organic Geochemistry,2012,43(1):103-111.
[7]Dai J X,Ni Y Y,Zou C N,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.
[8]Dai Jinxing,Liao Fengrong,Ni Yunyan.Discussions on the gas source of the Triassic Xujiahe Formation tight sandstone gas reservoirs in Yuanba and Tongnanba,Sichuan Basin:An answer to Yinfeng et al[J].Petroleum Exploration and Development,2013,40(2):250-256.[戴金星,廖凤蓉,倪云燕.四川盆地元坝和通南巴地区须家河组致密砂岩气藏气源探讨——兼答印峰等[J].石油勘探与开发,2013,40(2):250-256.]
[9]Wu Xiaoqi,Huang Shipeng,Liao Fengrong,et al.Carbon isotopic compositions of coal-derived gas in the Xujiahe Formation and Jurassic in the Sichuan Basin[J].Petroleum Exploration and Development,2011,38(4):418-427.[吴小奇,黄士鹏,廖凤蓉,等.四川盆地须家河组和侏罗系煤成气碳同位素特征[J].石油勘探与开发,2011,38(4):418-427.]
[10]Dai Jinxing.Giant Coal-derived Gasfields and the Source in China[M].Beijing:Science Press:2014,1-424.[戴金星.中国煤成大气田及气源[M].北京:科学出版社,2014:1-424.]
[11]Xie Gangping.Source of gas reservoirs in the fourth member of the middle Triassic Leikoupo Formation in western Sichuan Depression[J].Petroleum Exploration & Development,2015,37(4):418-422.[谢刚平.川西坳陷中三叠统雷口坡组四段气藏气源分析[J].石油实验地质,2015,37(4):418-422.]
[12]Ye Jun.Assessment of hydrocarbon source rocks in Xu-2 member,Ma’antang Formation,gas system in west Sichuan Depression[J].Natural Gas Industry,2003,23(1):21-25.[叶军.川西坳陷马鞍塘组——须二段天然气成矿系统烃源岩评价[J].天然气工业,2003,23(1):21-25.]
[13]Shen Zhongmin,Liu Tao,Lv Zhengxiang,et al.A comparision study on the gas source of Jurassic natural gas in the western Sichuan Depression[J].Geological Journal of China Universities,2008,14(4):577-582.[沈忠民,刘涛,吕正祥,等.川西坳陷侏罗系天然气气源对比研究[J].高校地质学报,2008,14(4):577-582.]
[14]Leng Jigao,Yang Keming,Ye Jun,et al.Carbon isotope features of alkane gases of Xujiahe Formation in Xiaoquan-Fenggu structural belt and their gas-source correlation[J].Journal of Oil and Gas Technology,2011,33(6):16-21.[冷济高,杨克明,叶军,等.孝泉-丰谷构造带须家河组天然气烷烃碳同位素特征及气源对比[J].石油天然气学报,2011,33(6):16-21.]
[15]Hu G Y,Yu C,Ni Y Y,et al.Comparative study of stable carbon and hydrogen isotopes of alkane gases sourced from the Longtan and Xujiahe coal-bearing measures in the Sichuan Basin,China[J].International Journal of Coal Geology,2013(116/117):293-301.
[16]Yang Keming.Characteristics of Xinchang Movement in Sichuan Basin and its geological significance[J].Petroleum Geology & Experiment,2014,36(4):391-397.[杨克明.四川盆地“新场运动”特征及其地质意义[J].石油实验地质,2014,36(4):391-397.]
[17]Pang Xiongqi,Zhou Haiyan,Li Jianqing,et al.The quantitative identification model of the evolution degree of mixing natural gas source material and the application of this model[J].Acta Petrolei Sinica,2000,21(5):16-20.[庞雄奇,周海燕,李建青,等.判别混源气母质转化程度的定量模式及其应用[J].石油学报,2000,21(5):16-20.]
[18]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.]
[19]Bernard B B,Brooks J M,Sackett W M.Natural gas seepage in the Gulf of Mexico[J].Earth and Planetary Science Letters,1976,31(1):48-54.
[20]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.
[21]Zhang Shiya,Gao Jianjun,Jiang Tairan.A new approach to identify the natural gas types by carbon isotopes of methane and ethane[M]//Collected Works on Oil and Gas Geology(Vol.1).Beijing:Geological Press,1988:48-58.[张士亚,郜建军,蒋泰然.利用甲、乙烷碳同位素判识天然气类型的一种新方法[M]//石油与天然气地质文集(第一集).北京:地质出版社,1988:48-58.]
[22]Dai Jinxing,Qin Shengfei,Tao Shizhen,et al.Developing 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.]
[23]Liu Q Y,Dai J X,Li J,et al.Hydrogen isotope composition of natural gases from the Tarim Basin and its indication of depositional environments of the source rocks[J].Science in China:Series D,2008,51(2):300-311.
[24]Wang X F,Liu W H,Shi B G,et al.Hydrogen isotope characteristics of thermogenic methane in Chinese sedimentary basins[J].Organic Geochemistry,2015(83/84):178-189.
[25]Yu Cong,Gong Deyu,Huang Shipeng,et al.Geochemical characteristics of carbon and hydrogen isotopes for the Xujiahe Formation natural gas in Sichuan Basin[J].Natural Gas Geoscience,2014,25(1):87-97.[于聪,龚德瑜,黄士鹏,等.四川盆地须家河组天然气碳、氢同位素特征及其指示意义[J].天然气地球科学,2014,25(1):87-97.]
[26]Wang Shunyu,Dai Hongming,Wang Haiqing,et al.Geochemical characteristics of Jurassic gas in Baimamiao Gasfield[J].Natural Gas Industry,2004,24(3):12-15.[王顺玉,戴鸿鸣,王海清,等.白马庙气田侏罗系天然气地化特征[J].天然气工业,2004,24(3):12-15.]
[27]Zhu Rukai,Zhao Xia,Liu Liuhong,et al.Depositional system and favorable reservoir distribution of Xujiahe Formation in Sichuan Basin[J].Petroleum Exploration & Development,2009,36(1):46-55.[朱如凯,赵霞,刘柳红,等.四川盆地须家河组沉积体系与有利储集层分布[J].石油勘探与开发,2009,36(1):46-55.]
[28]Wang Dongyan,Zeng Huasheng,Wang Jinyi.Evaluation on Upper Triassic hydrocarbon source rocks of western Sichuan Depression,Sichuan Basin[J].Petroleum Geology & Experiment,2010,32(2):192-195.[王东燕,曾华盛,王津义.四川盆地川西坳陷中段上三叠统烃源岩评价[J].石油实验地质,2010,32(2):192-195.]
[29]Zhang M,Huang G H,Li H B,et al.Molecular geochemical characteristics of gas source rocks from the Upper Triassic Xujiahe Formation indicate transgression events in the Sichuan Basin[J].Science China Earth Sciences,2012,55(8):1260-1268.
[30]Stahl W J,Carey Jr B D.Source-rock identification by isotope analyses of natural gases from fields in the Val Verde and Delaware basins,west Texas[J].Chemical Geology,1975,16(4):257-267.
[31]Wang Shiqian,Luo Qihou,Deng Hongbin,et al.Characteristics of forming Jurassic gas reservoirs in the west part of Sichuan Basin[J].Natural Gas Industry,2001,21(2):1-8.[王世谦,罗启后,邓鸿斌,等.四川盆地西部侏罗系天然气成藏特征[J].天然气工业,2001,21(2):1-8.]
[32]Cai Kaiping,Liao Shimeng.A research on the gas source of Jurassic gas reservoirs in western Sichuan Basin[J].Natural Gas Industry,2000,20(1):36-41.[蔡开平,廖仕孟.川西地区侏罗系气藏气源研究[J].天然气工业,2000,20(1):36-41.]
[33]Wang Shiqian.Geochemical characteristics of Jurassic-Sinian gas in Sichuan Basin[J].Natural Gas Industry,1994,14(6):1-5.[王世谦.四川盆地侏罗系—震旦系天然气的地球化学特征[J].天然气工业,1994,14(6):1-5.]
[34]Wu X Q,Huang S P,Liao F R,et al.Carbon isotopic characteristics of Jurassic alkane gases in the Sichuan Basin,China[J].Energy Exploration & Exploitation,2010,28(1):25-36.
[35]Qin Shengfei,Dai Jinxing,Wang Lansheng.Different origins of natural gas in secondary gas pool in western Sichuan foreland basin[J].Geochimica,2007,36(4):368-374.[秦胜飞,戴金星,王兰生.川西前陆盆地次生气藏天然气来源追踪[J].地球化学,2007,36(4):368-374.]
[36]Zhang T W,Krooss B M.Experimental investigation on the carbon isotope fractionation of methane during gas migration by diffusion through sedimentary rocks at elevated temperature and pressure[J].Geochimica et Cosmochimica Acta,2001,65(16):2723-2742.
[37]Wu Xiaoqi,Wang Ping,Pan Wenlei,et al.Geochemical characteristics and origin of formation water in the 5th member of the Upper Triassic Xujiahe Formation in Xinchang structure,West Sichuan Depression[J].Natural Gas Industry,2016,36(3):22-29.[吴小奇,王萍,潘文蕾,等.川西坳陷新场构造须五段地层水地球化学特征及其成因[J].天然气工业,2016,36(3):22-29.]
[38]Zhang E,Hill R J,Katz B J,et al.Modeling of gas generation from the Cameo coal zone in the Piceance Basin,Colorado[J].AAPG Bulletin,2008,92(8):1077-1106.

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