A preliminary study on the pore characterization of Lower Silurian black shales in the Chuandong Thrust Fold Belt, southwestern China using low pressure N2 adsorption and FE-SEM methods
A preliminary study on the pore characterization of Lower Silurian black shales in the Chuandong Thrust Fold Belt, southwestern China using low pressure N2 adsorption and FE-SEM methods
复制标题
低压N2吸附和FE-SEM方法对川东冲断褶皱带下志留统黑色页岩孔隙表征的初步研究
DOI：
10.1016/j.marpetgeo.2013.07.008
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发表时间：
2013-12
影响因子：
4.2
通讯作者：
Huang, Baojia
中科院分区：
文献类型：
--
作者：
Tian, Hui;Pan, Lei;Xiao, Xianming;Wilkins, Ronald W.T.;Meng, Zhaoping;Huang, Baojia
尽管四川盆地内部及周边的下志留统黑色页岩因其潜在的页岩气勘探前景而在过去几年中重新受到关注，但与页岩气储层评价相关的研究仍然很少。本研究从中国西南川东逆冲褶皱带新近钻探的一口井中采集了8个黑色页岩岩心样品，利用低压氮气吸附分析和场发射扫描电子显微镜(FE-SEM)观察了它们的地球化学和孔隙结构。结果表明，黑色页岩的总有机碳值为1.01%~3.98%，镜质组反射率为2.84%~3.05%。矿物基质和有机质孔隙发育良好，孔径从几个纳米到几百个纳米不等。8个样品的总孔隙度在2.60%~4.74%之间，有机质孔隙百分比估计在31%~62%之间。总比表面积为5.06~19.32×m~2/g，t-曲线法估算的微孔(~lt；2 nm)比表面积为3.13~9.27×m~2/g，总有机碳与总孔隙度、总比表面积、微孔(~1~2 nm)体积和比表面积呈正相关，表明总有机碳可作为研究区页岩气储层评价的有效参数。
Although Lower Silurian black shales within and around the Sichuan Basin have received renewed attention during the past few years because of their potential prospectivity for shale gas, studies associated with shale gas reservoir evaluation are still rare. In this study, eight black shale core samples were collected from a well drilled recently in the Chuandong Thrust Fold Belt, southwestern China, and their geochemistry and pore structures were investigated using low pressure N2adsorption analysis and field emission scanning electron microscopy (FE-SEM) observations. The results show that the black shales have total organic carbon (TOC) values ranging from 1.01% to 3.98% and their equivalent vitrinite reflectance values are in the range of 2.84%–3.05%. Both mineral matrix and organic matter pores are well developed with pore sizes ranging from several to several hundred nanometers. The total porosity for the eight samples ranges from 2.60% to 4.74% and the percentages of organic matter pores are estimated to be in the range of 31%–62%. The total surface area ranges from 5.06 m2/g to 19.32 m2/g and the micropore (<2 nm) surface area estimated by the t-plot method ranges from 3.13 m2/g to 9.27 m2/g. The TOC values have positive relationships with the total porosity, total surface area and the micropore (<2 nm) volume and surface area, indicating TOC may be an effective parameter for shale gas reservoir evaluation in the studied area.
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影响因子：
3.9
作者：
Krooss, BM;Littke, R;Idiz, EF
通讯作者：
Idiz, EF
影响因子：
4.2
作者：
Schmitt, Mayka;Fernandes, Celso P.;dos Santos, Viviane S. S.
通讯作者：
dos Santos, Viviane S. S.
影响因子：
5.6
作者：
Chalmers, Gareth R. L.;Bustin, R. Marc
通讯作者：
Bustin, R. Marc
影响因子：
3.5
作者：
Curtis, Mark E.;Sondergeld, Carl H.;Rai, Chandra S.
通讯作者：
Rai, Chandra S.
影响因子：
5.2
作者：
C. Scherdel;G. Reichenauer;M. Wiener
通讯作者：
C. Scherdel;G. Reichenauer;M. Wiener