A New Method for Semi-quantitative Analysis of Amorphous SiO2 in Terrestrial Shale:A Case Study about Yanchang Formation Shale,Ordos Basin
Received date: 2015-03-26
Revised date: 2015-04-23
Online published: 2015-11-10
Yanchang Formation shale of Ordos Basin contains a certain amount of amorphous SiO2,which has been proved by SEM observation and X-ray diffraction analysis of bulk rock.The three methods proposed by now to calculate the quantity of amorphous SiO2 have their own flaws.The disadvantages of chemical denudation are experimental period and unconvinced accuracy because of dissolving other minerals.Quantitative analysis of amorphous silica by X-ray diffraction possesses high personal error on the integrated intensity of dome-shaped scattering curve in XRD spectrum of amorphous SiO2.The doping method has high deviation and needs to compound standard sample,while some kinds of pure minerals are hard to obtain.On the basis of summarizing previous researches,a new method that combines QEMSCAN and XRD is proposed for the issue of amorphous SiO2 calculation in multiphase system.The new method avoids the flaws in approaches which have been proposed,and calculates the amount of amorphous SiO2 indirectly according to the quantities of quartz and SiO2 measured respectively.
Key words： SEM; QEMSCAN; Amorphous SiO2; XRD; Ordos Basin
HUANG Zhi-long，LIU Guo-heng，MA Jian，XUE Dong-qing，HAN Wei，CHEN Jin-long，CHEN Zhi-yuan . A New Method for Semi-quantitative Analysis of Amorphous SiO2 in Terrestrial Shale:A Case Study about Yanchang Formation Shale,Ordos Basin[J]. Natural Gas Geoscience, 2015 , 26(11) : 2017 -2028 . DOI: 10.11764/j.issn.1672-1926.2015.11.2017
[1]Zou Cainenng,Tao Shizhen,Hou Lianhua,et al.Unconventional Petroleum Geology[M].2nd edition.Beijing:Geological Publishing House,2013.[邹才能,陶士振,侯连华,等.非常规油气地质[M].第二版.北京：地质出版社,2013.]
[2]Yang Chao,Zhang Jinchuan,Tang Xuan.Microscopic pore types and its impact on the storage and permeability of continental shale gas,Ordos Basin[J].Earth Science Frontiers,2013,20(4):240-250.[杨超,张金川,唐玄.鄂尔多斯盆地陆相页岩微观孔隙类型及对页岩气储渗的影响[J].地学前缘,2013,20(4):240-250.]
[3]Guo Huijuan,Wang Xiangzeng,Zhang Lixia,et al.Adsorption of N2 and CO2 on mature shale before and after extraction and its implication for investigations of pore structures[J].Geochemica,2014,43(4):408-414.[郭慧娟,王香增,张丽霞,等.抽提前后成熟页岩对氮气、二氧化碳的吸附特征及其对孔隙研究的意义[J].地球化学,2014,43(4):408-414.]
[4]Guo Huijuan,Jia Wanglu,Peng Ping′an,et al.The composition and its impact on the methane sorption of lacustrine shales from the Upper Triassic Yanchang Formation,Ordos Basin,China[J].Marine and Petroleum Geology,2014,57:509-520.
[5]Jiang Yuqiang,Dong Dazhong,Qi Lin,et al.The basic characteristic and evaluation of shale reservoir[J].Natural Gas Industry,2010,30(10):7-12.[蒋裕强,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.]
[6]Jarvie D M,Hill R J,Ruble T E,et al.Unconventional shale-gas systems:The Mississippian Barnett shale of north-central Texas as one model for thermo genic shale-gas assessment[J].AAPG Bulletin,2007,91(4):475-499.
[7]Chaika C,Williams L A.Density and mineralogy variations as a function of porosity in Miocene Monterey Formation oil and gas reservoirs in California[J].AAPG Bulletin,2001,85(1):149-167.
[8]Zheng Zhe.Experimental research of silica phases in opal siliceous rock[J].Acta Minalogica Sinica,1986,6(3):258-266.[郑辙.蛋自石硅质岩中二氧化硅相的实验研究[J].矿物学报,1986,6(3):258-266.]
[9]Peltonen C,Marcussen ,Bjrlykke 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.
[10]Thyberg B,Jahren J.Quartz cementation in mudstones:sheet-like quartz cement from clay mineral reactions during burial[J].Petroleum Geoscience,2011,17:53-63.
[11]Thyberg B,Jahren J,Winje T,et al.Quartz cementation in Late Cretaceous mudstones,northern North Sea:Changes in rock properties due to dissolution of smectite and precipitation of microquartz crystals[J].Marine and Petroleum Geology,2010,27:1752-1764.
[12]Jarvie D M,Hill R J,Ruble T E,et al.Unconventional shale-gas systems:The Mississippian Barnett Shale of north-central Texas as one model for thermogenic shale-gas assessment[J].AAPG Bulletin,2007,91(4):475-499.
[13]Chen Quanhong,Li Wenhou,Gao Yongxiang,et al.The deep lacustrine sedimentary and its importance of oil-gas accumulation of Yanchang Formation in Late Triassic of Ordos Basin[J].Science in China:Series D,2007,37(1):39-48.[陈全红,李文厚,高永祥,等.鄂尔多斯盆地上三叠统延长组深湖沉积与油气聚集意义[J].中国科学:D辑,2007,37(1):39-48.]
[14]Zhang Wenzheng,Yang Hua,Yang Yihua,et al.Petroleum and element geochemistry and development environment of Yanchang Formation Chang-7 high quality source rocks in Ordos Basin[J].Geochemica,2008,37(1):59-64.[张文正,杨华,杨奕华,等.鄂尔多斯盆地长7优质烃源岩的岩石学、元素地球化学特征及发育环境[J].地球化学,2008,37(1):59-64.]
[15]Zhang Wenzheng,Yang Hua,Xie Liqin,et al.Discovery of micro- and nano-fossils in high grade hydrocarbon source rocks of the Triassic Yanchang Formation chang-7 member in Ordos Basin and its scientific significance[J].Acta Palaeontologica Sinica,2011,50(1):109-117.[张文正,杨华,解丽琴,等.鄂尔多斯盆地延长组长7段优质烃源岩中超微化石的发现及意义[J].古生物学报,2011,50(1):109-117.]
[16]Lin Jinhui.Quantitative analysis of amorphous silica in multicomponent system by X-ray diffraction[J].Mineral Petrol,1997,17(4):22-25.[林金辉.多相体系中非晶态二氧化硅X-射线衍射定量分析[J].矿物岩石,1997,17(4):22-25.]
[17]Chu Gang.A doping method for quantitative X-ray diffraction phase analysis of samples containing amorphous material[J].Acta Physica Sinica,1998,47(7):1143-1145.[储刚.含非晶样品的X-射线衍射增量定量相分析方法[J].物理学报,1998,47(7):1143-1145.]
[18]PopovicS,Greta-PlenkovicB,Baliě-unicT.The doping method in quantitative X-ray diffraction phase analysis addendum[J].Journal of Applied Crystallography,1983,16(5):505-507.
/
| 〈 |
|
〉 |
甘公网安备 62010202000678号