何利;宋春彦;刘建清;

• 1:中国地质调查局成都地质调查中心

• 2:国土资源部沉积盆地与油气资源重点实验室

摘要(Abstract)：

通过野外地质调查资料、X线衍射及主、微量元素测试分析,研究川南马边地区五峰—龙马溪组页岩的矿物学、地球化学特征及富有机质页岩的形成机理。结果表明:五峰—龙马溪组富有机质页岩段SiO_2质量分数随有机碳质量分数的减少而减少,Al_2O_3、TiO_2、Fe_2O_3和K_2O的质量分数随有机碳质量分数减少而逐渐增加,Ba、U、Nd和Sm等微量元素具有显著正异常,而Th、Nb、Sr、P和Ti表现为相对亏损;贫有机质页岩段SiO_2、Al_2O_3、TiO_2、Fe_2O_3、K_2O和MgO的质量分数较稳定,其微量元素与富有机质页岩段的相似,但元素波动小;所有页岩的轻稀土较富集,δCe亏损,δEu富集。五峰—龙马溪组自下而上由还原环境缓慢过渡到氧化环境,同时由深水陆棚缓慢过渡到浅水陆棚环境;生物钡总体向上逐渐减少,古生产力逐渐降低;有机质富集且受古生产力和氧化还原环境的控制。该研究结果为研究川南马边地区海相页岩气勘探提供参考。

关键词(KeyWords)：五峰—龙马溪组;地球化学特征;黑色页岩;有机质富集;微量元素;氧化还原环境;马边地区

Abstract:

Keywords:

基金项目(Foundation):国家自然科学基金项目(41502112)

作者(Author):何利;宋春彦;刘建清;

Email:

参考文献(References)：

• [1]张抗,谭云冬.世界页岩气资源潜力和开采现状及中国页岩气发展前景[J].当代石油石化,2009,17(3):9-18.Zhang Kang,Tan Yundong.The status of world shale gas resources potential and production status as well as development prosoect of China's shale gas[J].Contemporary Petroleum and Petrochemical,2009,17(3):9-18.

• [2]《页岩气地质与勘探开发实践丛书》编委会.北美地区页岩气勘探开发新进展[M].北京:石油工业出版社,2009."Shale Gas Geology and Exploration and Development practice Series"Editorial Committee.New development of shale gas exploration and development in north America[M].Beijing:Petroleum Industry Press,2009.

• [3]邹才能,董大忠,王社教,等.中国页岩气形成机理、地质特征及资源潜力[J].石油勘探与开发,2010,37(6):641-653.Zou Caineng,Dong Dazhong,Wang Shejiao,et al.Geological characteristics,formation mechanism and resource potential of shale gas in China[J].Petroleum Exploration and Development,2010,37(6):641-653.

• [4]董大忠,邹才能,李建忠,等.页岩气资源潜力与勘探开发前景[J].地质通报,2011,30(2/3):324-336.Dong Dazhong,Zou Caineng,Li Jianzhong,et al.Resource potential,exploration and development prospect of shale gas in the whole world[J].Geological Bulletin of China,2011,30(2/3):324-336.

• [5]李贤庆,赵佩,孙杰,等.川南地区下古生界页岩气成藏条件研究[J].煤碳学报,2013,38(5):864-869.Li Xianqing,Zhao Pei,Sun Jie,et al.Study on the accumulation conditions of shale gas from the lower paleozoic in the south region of Sichuan basin[J].Journal of China Coalsociety,2013,38(5):864-869.

• [6]闫存章,黄玉珍,葛春梅,等.页岩气是潜力巨大的非常规天然气资源[J].天然气工业,2009,29(5):1-6.Yan Cunzhang,Huang Yuzhen,Ge Chunmei,et al.Shale gas:Enormous potential of unconventional natural gas resources[J].Natural Gas Industry,2009,29(5):1-6.

• [7]赵立鹏,王冉,钟方军,等.赣东北重点泥页岩层系地球化学特征分析[J].特种油气藏,2017,24(1):64-69.Zhao Lipeng,Wang Ran,Zhong Fangjun,et al.Geochemistry features of key mud shale formations in northeast Jiangxi province[J].Special Oil&Gas Reservoirs,2017,24(1):64-69.

• [8]王玉满,董大忠,李建忠,等.川南下志留统龙马溪组页岩气储层特征[J].石油学报,2012,33(4):551-561.Wang Yunman,Dong Dazhong,Li Jianzhong,et al.Reservoir characteristics of shale gas in Longmaxi formation of the lower silurian,shoutheern Sichuan[J].Acta Petrolei Sinica,2012,33(4):551-561.

• [9]张春明,张维生,郭英海.川东南—黔北地区龙马溪组沉积环境及对烃源岩的影响[J].地学前缘,2012,19(1):137-143.Zhang Chunming,Zhang Weisheng,Guo Yinghai.Sedimentary environment and its effect on hydrocarbon source rocks of Longmaxi formation and its effect on hydrocarbon sourcerocks of Longmaxi formation in southeast Sichuan and northern Guizhou[J].Earth Science Frontiers,2012,19(1):137-143.

• [10]刘树根,王世玉,孙玮,等.四川盆地及其周缘五峰组—龙马溪组黑色页岩特征[J].成都理工大学学报:自然科学版,2013,40(6):621-639.Liu Shugen,Wang Shiyu,Sun Wei,et al.Characteristics of black shale in Wufeng formation and Longmaxi formation in Sichuan basin and its periperal areas[J].Journal of Chengdu Universict of Technology:Science&Techanology Edition,2013,40(6):621-639.

• [11]王淑芳,董大忠,王玉满,等.四川盆地南部志留系龙马溪组富有机质页岩沉积环境的元素地球化学判别指标[J].海相油气地质,2014,19(3):27-33.Wang Shufang,Dong Dazhong,Wang Yuman,et al.Geochemistry evaluation index of redox-sensitive elements for depositional environments of silurian Longmaxi organic-rich shale in the south of Sichuan basin[J].Marine Oil and Gas Geology,2014,19(3):27-33.

• [12]蒲泊伶,蒋有录,王毅,等.四川盆地下志留统龙马溪组页岩气成藏条件及有利地区分析[J].石油学报,2010,31(2):225-230.Pu Boling,Jiang Youlu,Wang Yi,et al.Reservoir-forming conditions and favorable exploration zones of shale gas in lower silurian Longmaxi formation of Sichuan basin[J].Acta Petrolei Sinica,2010,31(2):225-230.

• [13]王亮,陈云燕,刘玉霞.川东南彭水地区龙马溪组页岩孔隙结构特征[J].中国石油勘探,2014,19(5):80-88.Wang Liang,Chen Yunyan,Liu Yuxia.Shale porous structural characteristics of Longmaxi formation in Pengshui area of southeast Sichuan basin[J].China Petroleum Exploration,2014,19(5):80-88.

• [14]秦川,余谦,刘伟,等.黔北地区龙马溪组富有机质泥岩储层特征与勘探前景[J].东北石油大学学报,2016,40(5):86-93.Qin Chuan,Yu Qian,Liu Wei,et al.Reservoir characteristics and exploration prospect of organicrich mudstone,Longmaxi formation in northern Guizhou[J].Journal of Northeast Petroleum University,2016,40(5):86-93.

• [15]赵佩,李贤庆,田兴旺,等.川南地区龙马溪组页岩气储层微孔隙结构特征[J].天然气地球科学,2014,25(6):950-954.Zhao Pei,Li Xianqing,Tian Xingwang,et al.Study on micropore structure characteristics of Longmaxi formation shale gas reservoirs in the southern Sichuan basin[J].Natural Gas Geoscience,2014,25(6):950-954.

• [16]万洪程,孙玮,刘树根,等.四川盆地及周缘地区五峰—龙马溪组页岩气概况及前景评价[J].成都理工大学学报:自然科学版,2012,39(2):176-181.Wan Hongchen,SunWei,Liu Shugen,et al.Eneral situation and prospect evaluation of the shale gas in Wufeng-Longmaxi formation of Sichuan basin and surrounding areas[J].Journal of Chengdu Universict of Technology:Science&Techanology Edition,2012,39(2):176-181.

• [17]林彤,雍自权,刘树根,等.川东南石林地区五峰组—龙马溪组黑色页岩特征[J].东北石油大学学报,2015,39(3):83-91.Lin Tong,Yong Ziquan,Liu Shugeng,et al.Basic characteristic of shale of Wufeng-Longmaxi formation in Shilin,southeast of Sichuan basin[J].Journal of Northeast Petroleum University,2015,39(3):83-91.

• [18]王庆波,刘若冰,李春燕,等.四川盆地及周缘五峰—龙马溪组页岩气地质条件研究[J].重庆科技学院学报:自然科学版,2012,14(5):17-21.Wang Qingbo,Liu Ruobing,Li Chunyan,et al.Geologic condition of the upper Ordovician-Lower silurian shale gas in the Sichuan basin and its periphery[J].Journal of Chongqing Institute of Science and Technology:Science&Techanology Edition,2012,14(5):17-21.

• [19]Chalmers G R,Bustin R M,Power I M.Characterization of gas shale pore systems by porosimetry,pycnometry,surface area,and field mission scanning electron microscopy/transmission electronmicroscopy image analyses:Examples form the Barnett,Woodford,Haynesville,Marcellus and Doig units[J].AAPG Bulletin,2012,96(6):1099-1119.

• [20]Henderson P.Rare earth element geochemistry[M].Amsterdam:Elservier,1984.

• [21]Calvert S E,Pedersen T F,Naidu P D,et al.On the organiccarbon maximum on the continental slope of the eastern Arabian Sea[J].Jounral of Marine Research,1995,53:269-296.

• [22]Muller P J,Suess E.Productivity sedimentation rate and sedimentary organic matter in the ocean-organic carbon preservation[J].Deep-sea R esearch I,1979,58:1347-1362.

• [23]Pedersen T F,Calvert S E.Anoxia vs productivity:What controls the formation of organic-carbon-rich sediments and sedimentary rock[J].AAPG Bulletin,1990,74(4):454-466.

• [24]Clavert S E.Ocean graphic controls on the accumulation of organic matter in marine sediments[M]//Brook J,Fleet A J.Marine petroleum source rock.London:Blackwell Scientific,1987:137-151.

• [25]Calvert S E,Pedersen T F.Geochemistry of recent oxic and anoxic marine sediments:Implications for the geological record[J].Marine Geology,1993,113:67-88.

• [26]Chester R.Marine geochemistry[M].London:Blackwell Publishing,2003:373-378.

• [27]万晓樵,刘文灿,李国彪,等.白垩纪黑色页岩与海水含氧量变化——以西藏南部为例[J].中国地质,2003,30(1):36-47.Wan Xiaoqiao,Liu Wencan,Li Guobiao,et al.Cretaceous black shale and dissolved oxygen content:A case study in southern Tibet[J].Geology in China,2003,30(1):36-47.

• [28]Mazumdar A,Banerjee D M,Schidlowski M,et al.Rare earth elements and stable isotope geochemistry of early Cambrian chertphos phorite assemblages from the lower tal formation of the Krol Belt(Lesser Himalaya,India)[J].Chemical Geology,1999,159:275-297.

• [29]陈建芳.古海洋研究中的地球化学新指标[J].地球科学进展,2002,17(3):402-409.Chen Jianfang.New geochemical proxies in paleoceanography studies[J].Dvance in Earthsciences,2002,17(3):402-409.

• [30]Pi D H,Liu C Q,Shields-Zhou G A,et al.Trace and rare earth element geochemistry of black shale and kerogen in the early Cambrian Niutitang formation in Guizhou province,south China:Constraints for redox environments and origin of metal enrichments[J].Precambrian Research,2013,225:218-229.

• [31]Algeo T J,Kuwahara K,Sano H,et al.Spatial variation in sediment fluxes,redox conditions,and productivity in the PermianTriassic Panthalassic Ocean[J].Palaeogeography,Palaeoclimatology,Palaeoecology,2011,308(1/2):65-83.

• [32]Taylor S R,McLennan S M.The continental crust:Its composition and evolution[M].Oxford:Blackwell Scientific Publications,1985.

• [33]Algeo T J,Ingall E.Sedimmentary Corg:P ratios,paleocean ventilation and Phanerozoic atmospheric PO2[J].Palaeogeography Palaeoclimatology,Palaeoecology,2007,256(3/4):130-155.

• [34]Westermann S,Stein M,Matera V,et al.Rapid changes in the redox conditions of the western Tethys Ocean during the early Aptian oceanic anoxic event[J].Geochimica et Cosmochimica Acta,2013,121:467-486.

• [35]Crusius J,Calvert S,Pedersen T,et al.Rhenium and molybdenum enrichments in sediments as indicators of oxic,suboxic and sulfidic conditions of deposition[J].Earth and Planetary Science Letters,1996,145(1/4):65-78.

• [36]Abanda P A,Hannigan R E.Effect of diagenesis on trace element partitioning in shales[J].Chemical Geology,2006,230(1/2):42-59.

• [37]Wignall P B.Black shales[M].Oxford:Clarendon Press,1994:46.

• [38]Jones B,Manning A C.Comparison of geochemical indices used for the interpretation of paleoredox conditions in ancient mudstones[J].Chemical Geology,1994,111(1/4):111-129.

• [39]Emerson S R,Huested S S.Ocean anoxia and the concentrations of molybdenum and vanadium in seawater[J].Marine Chemistry,1991,34(3/4):177-196.

• [40]Hatch J R,Leventhal J S.Relationship between inferred redox potential of the depositional environment and geochemistry of the upper Pennsylvanian(Missourian)stark shale nember of the Dennis Limestone,Wabaunsee Country,Kansas,USA[J].Chemical Geology,1992,99(1/3):65-82.

• [41]雷家锦,李任伟,Tobschall H J.扬子地台南缘早寒武世黑色页岩中形态硫特征及成因意义[J].中国科学(D辑:地球科学),2000,30(6):592-601.Lei Jiajin,Li Renwei,Tobschall H J.Characteristics and genetic significance of morphological sulfur in the early cambrian black shale series on the southern of the Yangtze block[J].Science Chaina(D:Earth Science),2000,30(6):592-601.

• [42]Sageman B B,Murphy A E,Werne J P,et al.A tale of shales:The relative roles of production,decomposition,and dilution in the accumulation of organic-rich strata,middle-upper devonian,Appalachian basin[J].Chemical Geology,2003,195:229-273.

• [43]Mort H,Jacquat O,Adatte T,et al.The Cenomanian/Turonian anoxic event at the bonarelli level in Italy and spain:Enhanced productivity and/or better preservation[J].Cretaceous Research,2007,28:597-612.

• [44]Calvert S E,Fontugne M R.On the late pleistocenee holocene sapropel record of climatic and oceanographic variability in the eastern Mediterranean[J].Paleoceanography,2001,16:78-94.

• [45]Rinna J,Warning B,Meyers P A,et al.Combined organic and inorganic geochemical reconstruction of paleodepositional conditions of apliocene sapropel from the eastern Mediterranean sea[J].Geochimica et Cosmochimica Acta,2002,66:1969-1986.

• [46]Wei H Y,Chen D Z,Wang J G,et al.Organic accumulation in thelower Chihsia formation(Middle Permian)of south Chian:Constraints form pyrite morphology and multiple geochemical proxies[J].Palaeogeography,Palaeoclimatology,Palaeoeclogy,2012,353-355(3):73-86.

• [47]Morford J L,Emerdon S.The geochemistry of redox sensitive trace metals in sediments[J].Geochimicaet Cosmochimica Acta,1999,63:1735-1750.

• [48]李艳芳,邵德勇,吕海刚,等.四川盆地五峰组—龙马溪组海相页岩元素地球化学特征与有机质富集的关系[J].石油学报,2015,36(12):1470-1483.Li Yanfang,Shao Deyong,Lyu Haigang,et al.A relationship between elemental geochemical chaaracteristics and organic matter enrichment in marine shale of Wufeng-Longmaxi formations,Sichuan basin[J].Acta Petrolei Sinica,2015,36(12):1470-1483.