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天然气地球科学

• 天然气地球化学 • 上一篇    下一篇

辽河坳陷东部凹陷低熟气地球化学特征

李孝甫，王晓锋，郑建京，刘鹏，孟强，史宝光   

  1. 1.甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室，甘肃 兰州 730000；
    2.中国科学院大学，北京 100049；3.页岩气评价与开采四川省重点实验室，四川省煤田地质局，四川 成都 610072
  • 收稿日期:2015-02-10 修回日期:2015-03-13 出版日期:2015-07-10 发布日期:2015-07-10
  • 通讯作者: 王晓锋(1979-），男，陕西岐山人，副研究员，博士，主要从事油气地球化学研究.E-mail:wangxf@lzb.ac.cn.
  • 作者简介:李孝甫(1988-），男，甘肃靖远人，博士研究生，主要从事石油天然气地球化学研究.E-mail:xiaofu.lee88@outlook.com.
  • 基金资助:

    中国科学院西部行动计划项目“准噶尔盆地东部低熟气资源潜力与有利勘探区预测”(编号:KZCX2-XB3-12）；国家重点基础研究发展计划(编号:2012CB214801）|中国科学院“西部之光”人才培养计划项目“准东地区侏罗系各类烃源岩的生排烃特征及生烃潜力评价”(编号:Y404RC1）；甘肃省重点实验室专项(编号:1309RTSA041）联合资助.

Geochemistry of Low Maturity Gases from the Eastern Sag of Liaohe Depression,China

LI Xiao-fu，WANG Xiao-feng，ZHENG Jian-jing，LIU Peng，MENG Qiang，SHI Bao-guang   

  1. 1.Key Laboratory of Petroleum Resources,Gansu Province/ Key Laboratory of Petroleum Resources Research,
    Institute of Geology and Geophysics,Chinese Academy of Sciences,Lanzhou 730000,China;
    2.University of Chinese Academy of Sciences,Beijing 100049,China;3.Key Laboratory of Shale Gas Evaluation
    and Exploitation,Sichuan Province,Sichuan Coalfield Geology Bureau,Chengdu 610072,China
  • Received:2015-02-10 Revised:2015-03-13 Online:2015-07-10 Published:2015-07-10

PDF (PC)

717

摘要：

通过分析辽河坳陷东部凹陷29个天然气样品的地质和地球化学特征，探讨了研究区天然气成因类型的新认识。研究区主要烃源岩为古近系沙河街组和东营组，母质类型以偏腐殖型为主，热演化程度主体处于0.5%~1.0%之间。天然气组分以烃类气体占绝对优势，干气、湿气并存；δ13C1值为-46‰~-38‰、δ13C2值为-30‰~-25‰、δ2HCH4值为-250‰~-210‰；C5-7轻烃化合物中富含异构烷烃，庚烷值和异庚烷值均落在低演化区。对比分析吐哈低熟气特征，指出研究区探明天然气的主体属于低熟气范畴，满足其2个本质属性:母质为偏腐殖型、成熟度处于低演化阶段。气源对比表明，天然气主要来源于古近系沙三段(Es3）陆相湖盆偏腐殖型源岩，它的成熟度(RO）与基于“δ13C1—RO计算得出的天然气RO值(0.50%~0.90%）在空间分布特征上相吻合。此外，微生物活动对气藏后期的改造作用也不容忽视:大部分C2+烃类被微生物消耗而使天然气组分变干；C2、C3含量降低至一定程度时，δ13C2值、δ13C3值呈现异常高，甚至达到正值，而δ13C1值受微生物活动影响较小；正庚烷容易被降解而使研究区天然气庚烷值相比吐哈低熟气更低。

关键词: 低熟气, 地球化学, 生物降解, 偏腐殖型, 辽河坳陷

Abstract:

A suite of natural gases from the Eastern Sag of Liaohe Depression were characterized by their molecular and isotopic composition.The gas samples are largely gaseous hydrocarbons,together with high dryness(C1/∑C1-5 from 0.85 to 1.00),δ13C1(-46‰ to -38‰),δ13C2(-30‰ to -25‰),δ2HCH4(-250‰ to -210‰).Isoparaffin is enriched in light hydrocarbons and heptane value(H) & isoheptane value(I) both display a low maturity feature.In contrast with the geochemical characteristics of low maturity gases in the Turpan-Hami Basin,the natural gas in this region mainly belong to low maturity gas because of humic source rock and low maturity.The source rock in the study area is mainly developed in the Eocene Shahejie Formation(Es) and Dongying Formation(Ed).The organic matter of the source rock is humic-type and its vitrinite reflectance(RO ) ranges from 0.5% to 1.0%.The RO of source rocks which were calculated by the empirical relationship between the measured δ13C1 and RO ranges from 0.57% to 0.90%,which is in agreement with the actual RO of source rocks in this region,suggesting that the natural gases are derived from the source rock of the third Member of the Eocene Shahejie Formation(Es3).Additionally,most gas samples display clear geochemical evidence of biodegradation alteration.The majority of gases contain over 90% methane and small quantities of C2+ alkanes,carbon isotopic composition of C2 and C3 in two samples from shallow reservoirs are especially positive when the contents of them microbially decreased to a certain degree.High susceptibility to biodegradation of n-heptane leads to a lower heptane value(H) than the low maturity gas from Turpan-Hami Basin.

Key words: Lowmature gases, Geochemistry, Biodegradation, Humic-type, Liaohe Depression

中图分类号: 

  • TE122.1

［1］Wang Xiaofeng,Xu Yongchang,Shen Ping,et al.Geochemical characteristics and identification indexes of low-mature gases[J].Natural Gas Geoscience,2010,21(1):1-6.[王晓锋,徐永昌,沈平,等.低熟气地球化学特征与判识指标[J].天然气地球科学,2010,21(1):1-6.]
[2]Xu Y,Shen P,Liu W,et al.Natural gas of new genetic type:Bio-thermo-catalytic transitional zone gas[J].Science in China:Series B,1991,34(9):1113-1119.
[3]Liu W,Xu Y,Shi J,et al.Evolution model and formation mechanism of bio-thermocatalytic transitional zone gas[J].Science in China:Series D,1997,40(1):43-53.
[4]Liu Wenhui,Xu Yongchang.Bio-thermocatalytic transitional zone gas[J].Petroleum Exploration and Development,2005,32(4):30-36.[刘文汇,徐永昌.论生物—热催化过渡带气[J].石油勘探与开发,2005,32(4):30-36.]
[5]Tissot B P,Welte D H.Petroleum Formation and Occurrence:A New Approach to Oil and Gas Exploration[M].New York:Springer Verlag,1978:50-70.
[6]Rowe D,Muehlenbachs A.Low-temperature thermal generation of hydrocarbon gases in shallow shales[J].Nature,1999,398(6722):61-63.
[7]He Jiaxiong,Xian Zhongyou,Chen Weihuang,et al.Characterization and exploration potential of biogenic gas and biogenic-undermatured transition gas in Yinggehai-Qiongdongnan Basin[J].Natural Gas Geoscience,2001,12(6):1-11.[何家雄,冼仲猷,陈伟煌,等.莺—琼盆地生物气及生物—低熟过渡带气特征与勘探前景[J].天然气地球科学,2001,12(6):1-11.]
[8]Xu Y,Wang Z,Wang X,et al.Low-mature gases and typical low-mature gas fields in China[J].Science in China:Series D,2008,51(2):312-320.
[9]Xu Y,Wang X,Shi B.Low-mature gases and their resource potentiality[J].Chinese Journal of Geochemistry,2009,28(3):231-238.
[10]Xu Yongchang,Wang Xiaofeng,Shi Baoguang.Low-mature gas:An extension of the concept of coal-formed gas[J].Petroleum Exploration and Development,2009,36(3):408-412.[徐永昌,王晓锋,史宝光.低熟气—煤成气理念的延伸[J].石油勘探与开发,2009,36(3):408-412.]
[11]Lu Shuangfang,Wang Qiong,Li Jijun,et al.Evaluation method of low-mature gaseous and its application in north Songliao Basin[J].Natural Gas Geoscience,2008,19(1):8-12.[卢双舫,王琼,李吉君,等.低熟气评价方法及其在松辽盆地北部的应用[J].天然气地球科学,2008,19(1):8-12.]
[12]Galimov E M.Sources and mechanisms of formation of gaseous hydrocarbons in sedimentary rocks[J].Chemical Geology,1988,71(1-3):77-95.
[13]Galimov E M.Methane δ13C and δD data on the origin of gases in northern west Siberia(in Russian)[J].Doklady Rossiyskoy Akademii Nauk,1995,342(3):371-374.
[14]Nemchenko N N,Rovenskaya A S,Schoell M.Origin of natural gases in giant gas fields of northern west Siberia(in Russian)[J].Geologiya Neftii Gasa,1999,99(1/2):45-56.
[15]Wang Xiaofeng,Liu Wenhui,Zheng Jianjing.Formation mechanism of Urengoy Gasfield in the west Siberia Basin and its implication[J].Natural Gas Industry,2006,26(5):29-32.[王晓锋,刘文汇,郑建京,等.乌连戈伊气田形成机制及其启迪[J].天然气工业,2006,26(5):29-32.]
[16]Zhang Zhanwen,Gao Qingsheng,Wu Tiesheng.Geochemical characteristics and origin of natural gas from the Eastern Sag of Liaohe Depression[J].Natural Gas Geoscience,1995,6(2):1-8.[张占文,高庆胜,吴铁生.辽河盆地东部凹陷天然气的地球化学特征及成因分类[J].天然气地球科学,1995,6(2):1-8.]
[17]Li Jun,Hou Dujie,Li Jinghan,et al.Geochemical characterization and genetic types of natural gas in the Eastern Sag of Liaohe Depression[J].Natural Gas Industry,2011,31(2):43-47.[李军,侯读杰,李敬含,等.辽河坳陷东部凹陷天然气特征及成因类型[J].天然气工业,2011,31(2):43-47.]
[18]Wang Wanchun,Xu Yongchang.Chemical and isotopic compositions of gaseous hydrocarbons in Liaohe Basin[J].Acta Sedimentologica Sinica,1992,10(2):135-142.[王万春,徐永昌.辽河盆地烃类气体组分及同位素组成[J].沉积学报,1992,10(2):135-142.]
[19]Sun Hongbin,Zhang Fenglian.Tectonic and sedimentary evolution of Palaeogene in Liaohe Depression[J].Lithologic Reservoirs,2008,20(2):60-65.[孙洪斌,张凤莲.辽河坳陷古近系构造-沉积演化特征[J].岩性油气藏,2008,20(2):60-65.]
[20]Sun Hui,Zhou Xuhong,Li Jun,et al.Reservoir forming conditions and enrichment regularity of shallow gas field in the eastern Sag of Liaohe Depression[J].Natural Gas Geoscience,1997,8(2):27-32.[孙卉,周旭红,李军,等.辽河盆地东部凹陷浅层气成藏条件及富集规律研究[J].天然气地球科学,1997,8(2):27-32.]
[21]Sun Yongge,Sheng Guoying,Fu Jiamo,et al.Composition and significance of biomarkers in immature source rocks from the Eastern Sag of Liaohe Depression,China[J].Science in China:Series B,1995,25(12):1296-1302.[孙永革,盛国英,傅家谟,等.辽河盆地东部凹陷未成熟烃源岩中生物标记物组成特征及意义[J].中国科学:B辑,1995,25(12):1296-1302.]
[22]Liang Mingliang,Wang Zuodong,Zheng Jianjing.et al.Organic geochemistry characteristics of source rocks in Liaohe Depression[J].Lithologic Reservoirs,2014,26(4):110-116.[梁明亮,王作栋,郑建京,等.辽河断陷烃源岩有机地球化学特征[J].岩性油气藏,2014,26(4):110-116.]
[23]Cao Chunhui,Li Zhongping,Du Li,et al.The analysis method of natural gas components by gas isotope mass spectrometer MAT 271[J].Modern Scientific Instruments,2011,(5):103-106.[曹春辉,李中平,杜丽,等.气体同位素质谱仪MTA271分析天然气组分的方法研究[J].现代科学仪器,2011,(5):103-106.]
[24]Cao Chunhui,Li Liwu,Li Zhongping,et al.Composition analysis of natural gas by gas isotope mass spectrometer and chromatography[J].Chemical Analysis & Meterage,2011,20(3):36-39.[曹春辉,李立武,李中平,等.气体同位素质谱与色谱结合分析天然气组成[J].化学分析计量,2011,20(3):36-39.]
[25]Liu Wenhui,Liu Quanyou,Xu Yongchang,et al.The gaining and application of data in natural gas geochemistry study[J].Natural Gas Geoscience,2003,14(1):21-29.[刘文汇,刘全有,徐永昌,等.天然气地球化学数据的获取及应用[J].天然气地球科学,2003,14(1):21-29.]
[26]Dai Jinxing.Characteristics of stable carbon and hydrogen isotopes of natural gas and identification of various natural gases[J].Natural Gas Geoscience,1993,4(2/3):1-40.[戴金星.天气碳氢同位素特征和各类天然气鉴别[J].天然气地球科学,1993,4(2/3):1-40.]
[27]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.
[28]Hu G,Li J,Li J,et al.Preliminary study on the origin identification of natural gas by the parameters of light hydrocarbon[J].Science in China:Series D,2008,51(supplement 1):131-139.
[29]Xu Yongchang.Discussion on natural gas geochemistry[J].Natural Gas Geoscience,1999,10(3/4):20-28.[徐永昌.天然气地球化学研究及有关问题探讨[J].天然气地球科学,1999,10(3/4):20-28.]
[30]Hu G,Zhang S.Characterization of low molecular weight hydrocarbons in Jingbian Gasfield and its application to gas sources identification[J].Energy,Exploration & Exploitation,2011,29(6):777-796.
[31]George S C,Boreham C J,Minifie S A,et al.The effect of minor to moderate biodegradation on C5 to C9 hydrocarbons in crude oils[J].Organic Geochemistry,2002,33(12):1293-1317.
[32]Chen Jianfa,Chen Zhenyan,Ji Dongmin,et al.Discussion about the isotopically heavy ethane & propane in natural Gases from Liaohe Basin[J].Acta Sedimentologica Sinica,1998,16(2):5-8.[陈践发,陈振岩,季东民,等.辽河盆地天然气中重烃异常富集重碳同位素的成因探讨[J].沉积学报,1998,16(2):5-8.]
[33]Gang Wenzhe,Gao Gang,Hao Shisheng,et al.Carbon isotope of ethane applied in the analyses of genetic types of natural gas[J].Petroleum Geology & Experiment,1997,19(2):164-167.[刚文哲,高岗,郝石生,等.论乙烷碳同位素在天然气成因类型研究中的应用[J].石油实验地质,1997,19(2):164-167.]
[34]Liu Wenhui,Xu Yongchang.A two stage model of carbon isotopic fractionation in coal gas[J].Geochimica,1999,28(4):359-366.[刘文汇,徐永昌.煤型气碳同位素演化二阶段分馏模式及机理[J].地球化学,1999,28(4):359-366.]
[35]Li Mingcheng.An overview of hydrocarbon migration research[J].Petroleum Exploration and Development,2000,27(4):3-10.[李明诚.石油与天然气运移研究综述[J].石油勘探与开发,2000,27(4):3-10.]
[36]Jiang Zhenxue,Pang Xiongqi,Zeng Jianhui,et al.Research on types of the dominant migration pathways and their physical simulation experiments[J].Earth Science Frontiers,2005,12(4):507-516.[姜振学,庞雄奇,曾溅辉,等.油气优势运移通道的类型及其物理模拟实验研究[J].地学前缘,2005,12(4):507-516.]
[37]Chang Jinhuan,Zhao Limin.A Study of relationship between faults and petroleum migration & accumulation in Liaohe Basin[J].Natural Gas Geoscience,2000,11(3):13-17.[常津焕,赵立民.辽河盆地断裂与油气运移和聚集[J].天然气地球科学,2000,11(3):13-17.]
[38]Chen Zhenyan,Chen Yongchen,Chou Jintao,et al.Relationship between the Cenozoic faults and hydrocarbons in the Liaohe Basin[J].Petroleum Geology & Experiment,2002,24(5):407-412.[陈振岩,陈永成,仇劲涛,等.辽河盆地新生代断裂与油气关系[J].石油实验地质,2002,24(5):407-412.]
[39]Jenden P D,Newell K D,Kaplan I R,et al.Composition and stable-isotope geochemistry of natural gases from Kansas,Midcontinent,USA[J].Chemical Geology,1988,71(1):117-147.
[40]Zhang Tongwei,Chen Jianfa,Wang Xianbin,et al.Isotopic geochemical traces of gaseous hydrocarbons for natural gas migration[J].Acta Sedimentologica Sinica,1995,13(2):70-76.[张同伟,陈践发,王先彬,等.天然气运移的气体同位素地球化学示踪[J].沉积学报,1995,13(2):70-76.]
[41]Zhang T,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.
[42]Xia X,Tang Y.Isotope fractionation of methane during natural gas flow with coupled diffusion and adsorption/desorption[J].Geochimica et Cosmochimica Acta,2012,77:489-503.
[43]Boreham C J,Hope J M,Hartung-Kagi B.Understanding source,distribution and preservation of Australian natural gas:A geochemical perspective[J].APPEA Journal,2001,41(1):523-547.
[44]James A T,Burns B J.Microbial alteration of subsurface natural gas accumulations[J].AAPG Bulletin,1984,68(8):957-960.
[45]Head I M,Jones D M,Larter S R.Biological activity in the deep subsurface and the origin of heavy oil[J].Nature,2003,426(6964):344-352.
[46]Head I M,Jones D M,Larter S R.Biological activity in the deep subsurface and the origin of heavy oil[J].Nature,2003,426(6964):344-352.
[47]James A T.Correlation of natural gas by use of carbon isotopic distribution between hydrocarbon components[J].AAPG Bulletin,1983,67(7):1176-1191.
[48]Meng Weigong.Origin of natural gas with abnormal carbon isotopic composition:A case study from the Eastern Sag of Liaohe Depression[J].Petroleum Geology & Experiment,2004,26(6):585-589.[孟卫工.碳同位素组成异常的天然气成因探讨-以辽河坳陷东部凹陷为例[J].石油实验地质,2004,26(6):585-589.]
[49]Leythaeuser D,Schaefer R G,Cornford C,et al.Generation and migration of light hydrocarbons(C2-C7) in sedimentary basins[J].Organic Geochemistry,1979,1(4):191-204.
[50]Snowdon L R,Powell T G.Immature oil and condensate:Modification of hydrocarbon generation model for terrestrial organic matter[J].AAPG Bulletin,1982,66(6):775-788.
[51]Xie Zengye,Yang Wei,Hu Guoyi,et al.Composition and application of light hydrocarbons in natural gases from Sichuan Basin[J].Natural Gas Geoscience,2007,18(5):720-725.[谢增业,杨威,胡国艺,等.四川盆地天然气轻烃组成特征及其应用[J].天然气地球科学,2007,18(5):720-725.]
[52]Thompson K F M.Classification and thermal history of petroleum based on light hydrocarbons[J].Geochimica et Cosmochimica Acta,1983,47(2):303-316.
[53]Halpern H I.Development and applications of light-hydrocarbon-based star diagrams[J].AAPG Bulletin,1995,79(6):801-815.
[54]Xu Y,Shen P.A new model for the genesis of natural gases:multi-source overlap,multi-stage continuity,type controlled by main source and nomenclature by nain stage(I):Multi-source overlap and type controlled by main source[J].Science in China:Series B,1994,37(3):336-336.
[55]Xu Y,Shen P.A new model for the genesis of natural gases-multi-source overlap,multi-stage continuity,type controlled by main source and nomenclature by main stage(II):Multi-stage continuity and nomenclature by main stage[J].Science in China:Series B,1994,37(4):494-501.
[56]Yuan Mingsheng,Liang Shijun,Xu Yongchang,et al.Low-Mature Gases and Corresponding Field in China:Turpan-Hami Basin[M].Beijing:Science Press,2011:25-193.[袁明生,梁世君,徐永昌,等.低熟气及我国的低熟气区——吐哈油气区[M].北京:科学出版社,2011:25-193.]
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