收稿日期: 2015-04-17
修回日期: 2015-05-22
网络出版日期: 2015-08-10
基金资助
国家重点基础研究发展计划项目“中国南方古生界页岩气赋存富集机理和资源潜力评价(编号：2012CB214706)；国家重点基础研究发展计划项目“中国南方海相页岩气高效开发的基础研究”(编号：2013CB228006)；国家科技重大专项“页岩气勘探开发关键技术——南方海相页岩气开采试验”(编号：2012ZX05018-006)联合资助.
Reservior Diagenesis Research of Silurian Longmaxi Formation in Sichuan Basin
Received date: 2015-04-17
Revised date: 2015-05-22
Online published: 2015-08-10
在大量岩石薄片鉴定、扫描电镜、X-射线衍射等分析实验基础上，对四川盆地志留系龙马溪组页岩储层成岩作用进行了研究。共识别出压实作用、胶结作用、黏土矿物转化作用、交代作用、溶蚀作用、有机质热成熟作用以及构造破裂作用共7类成岩作用。其中胶结作用又包括了硅质、碳酸盐和硫化物胶结，总结了硅质胶结物的物质来源以及钙质胶结物发育的主控因素。在N3井单井分析的基础上，指出龙马溪组优质页岩储层段、次优页岩储层段与非页岩储层段经受了不同成岩事件的改造，其中优质页岩储层段经历的主要无机成岩作用除压实作用外，均与有机质热成熟作用存在明显联系。通过多项成岩指标综合分析认为，龙马溪组页岩储层现今处于中成岩B亚期—晚成岩阶段。无机矿物成岩作用对于页岩储层具有重要的影响，它控制了储层孔隙的保存、发展和演化，同时也影响着岩石的力学性质和页岩储层的吸附能力；有机质热成熟过程中排出的天然气是页岩气的物质来源，同时其在热成熟过程中生成的大量有机质纳米孔隙增大了储层孔隙度并提高了储层吸附能力。
孔令明，万茂霞，严玉霞，邹春艳，刘文平，田冲，易力 . 四川盆地志留系龙马溪组页岩储层成岩作用[J]. 天然气地球科学, 2015 , 26(8) : 1547 -1555 . DOI: 10.11764/j.issn.1672-1926.2015.08.1547
Based on a large number of thin section identification,scanning electron microscopy analysis,X-ray diffraction tests and some other experiments,the reservoir diagenesis of Silurian Longmaxi Formation in Sichuan Basin were studied.Seven diagenetic processes were identified,including compaction,cementation,clay mineral transformation,replacement,dissolution,organic matter thermal maturation and tectonic disruption.Three kinds of cements (quartz,carbonate and sulfide) were recognized,while the source material of quartz cements and the main factor of forming abandant carbonate cements were summed up.According to single well analysis of N3,it shows that the best,suboptimal and none shale reservoir sections were subjected to different diagenetic transformations.As to best shale reservoir,except for compaction,all the main inorganic diagenesis was significantly related to organic matter maturation.Through comprehensive analysis of diagentic indicators,it is indicated that the reservoir currently has already been in period B of middle diagenetic stage to late diagenetic stage.The inorganic diagenesis has a significant impact on shale reservoir,because it controls not only the conservation,development and evolution of porosity,but also the mechanical property and the adsorption capacity of rocks.However,the organic diagenesis is the source material of shale gas,and it generates a large number of nanoporosity in organic matter,which increase the total porosity and the adsorption capacity of the reservoir.
Key words： Sichuan Basin; Longmaxi Formation; Shale reservoir; Diagenesis
［1］Editorial Committee of“Shale Gas Geology and Exploration and Development Practice Series”.Advanced in Geological Research on Shale Gas in China［M］.Beijing:Petroleum Industry Press,2011.［《页岩气地质与勘探开发实践丛书》编委会.中国页岩气地质研究进展［M］.北京：石油工业出版社,2011.］
［2］[KG*5/6][ZK(]Wang Yuman,Dong Dazhong,Li Jianzhong,et al.Reservoir characteristics of shale gas in Longmaxi Formation of the Lower Silurian,Southern Sichuan［J］.Acta Petrolei Sinica,2012,33(4):551-561.［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.］
［3］〖ZK(3#〗Liu Shugen,Ma Wenxin,Luba J,et al.Characteristics of the shale gas reservoir rocks in the Lower Silurian Longmaxi Formation,east Sichuan Basin,China［J］.Acta Petrologica Sinica，2011,27(8):2239-2252.［刘树根,马文辛,Luba Jansa,等.四川盆地东部地区下志留统龙马溪组页岩储层特征［J］.岩石学报,2011,27(8):2239-2252.］
［4］Liu Shugen,Wang Shiyu,Sun Wei,et al.Characteristics of black shale in Wufeng Formation and Longmaxi Formation in Sichuan Basin and its peripheral areas［J］.Journal of Chengdu University of Technology:Science & Technology Edition,2013,40(6):621-639.［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.］
［5］Guo Tonglou,Zhang Hanrong.Formation and enrichment mode of Jiaoshiba shale gas field,Sichuan Basin［J］.Petroleum Exploration and Development,2014,41(1):28-36.［郭彤楼,张汉荣.四川盆地焦石坝页岩气田形成于富集高产模式［J］.石油勘探与开发,2014,41(1):28-36.］
［6］[KG*5/6]Zeng Xiangliang,Liu Shugen,Huang Wenming,et al.Comparison of Silurian Longmaxi Formation shale of Sichuan Basin in China and Carboniferous Barnett Formation shale of Fort Worth Basin in United States［J］.Geological Bulletin of China,2011,30(2/3)：372-384.［曾祥亮,刘树根,黄文明,等.四川盆地志留系龙马溪组页岩与美国Fort Worth盆地石炭系Barnett组页岩地质特征对比［J］.地质通报,2011,30(2/3):372-384.］
［7］Jiang Yuqiang,Dong Dazhong,Qi Lin,et al.Basic features and evaluation of shale gas reservoirs［J］.Natural Gas Industry,2010,30(10):7-12.［蒋玉强,董大忠,漆麟,等.页岩气储层的基本特征及其评价［J］.天然气工业,2010,30(10):7-12.］
［8］Wei Xiangfeng,Liu Ruobing,Zhang Tingshan,et al.Micro-pores structure characteristics and development control factors of shale gas reservoir:A case of Longmaxi Formation in XX area of southern Sichuan and northern Guizhou［J］.Natural Gas Geoscience,2013,24(5):1048-1059.［魏祥峰，刘若冰,张廷山，等.页岩气储层微观孔隙结构特征及发育控制因素——以川南—黔北XX地区龙马溪组为例［J］.天然气地球科学,2013,24(5):1048-1059.］
［9］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):947-956.［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):947-956.］
［10］Bi He，Jiang Zhenxue，Li Peng，et al.Shale reservoir characteristics and its influence on gas contentof Wufeng-Longmaxi Formation in the southeastern Chongqing［J］.Natural Gas Geoscience,2014,25(8):1275-1283.［毕赫,姜振学，李鹏，等.渝东南地区黔江凹陷五峰组—龙马溪组页岩储层特征及其对含气量的影响［J］.天然气地球科学,2014,25(8):1275-1283.］
［11］Aplin A C,Macquaker J H S.Mudstone diversity:Origin and implications for source,seal,and reservoir properties in petroleum systems［J］.AAPG Bulletin,2011,95(12):2031-2059.
［12］Worden R H,Morad S.Quartz cementation in oil field sandstones:A review of the key controversies［M］//Worden R H,Morad S.Quartz Cementation in Sandstones.Special Publication No.29 of the International Association of Sedimentologists.Blackwell Publishing,2000:1-20.
［13］Velde B.Compaction trends of clay-rich deep sea sediments［J］.Marine Geology,1996,(3/4):193-201.
［14］Worden R H,Burley S D.Sandstone diagenesis:The evolution of sand to stone［M］//Burley S D,Worden R H.Sandstone Diagenesis:Recent and Ancient.Reprint Series Volume 4 of the International Association of Sedimentologists.Blackwell Publishing,2003:3-44.
［15］Peltonen C,Marcussen A,Bjorlykke K,et al.Clay mineral diagenesis and quartz cementation in mudstones:The effects of smectite to illite reaction on rock properties［J］.Marine and petroleum Geology,2009,26(6):887-898.
［16］Hower J,Eslinger E V,Hower M E,et al.Mechanism of burial metamorphism of argillaceous sediment:1.Mineralogical and chemical evidence［J］.Geological Society of America Bulletin,1976,87(5):725-737.
［17］Hicky J J,Henk Bo.Lithofacies summary of the Mississippian Barnett Shale,Mitchell 2 T.P.Sims well,Wise County,Texas［J］.AAPG Bulletin,2007,91(4):437-443.
［18］Loucks R G,Reed R M,Ruppel S C,et al.Spectrum of pore types and networks in mudrocks and a descriptive classification for matrix-related mudrock pores［J］.AAPG Bulletin,2012,96(6):1071-1098.
［19］Milliken K L,Rudnicki M,Awwiller D N,et al.Organic matter-hosted pore system,Marcellus Formation(Devonian),Pennsylvania［J］.AAPG Bulletin,2013,97(2):177-200.
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