Pore structure of two organic-rich shales in southeastern Chongqing area: Insight from Focused Ion Beam Scanning Electron Microscope (FIB-SEM)

Ma Yong; Zhong Ningning; Cheng Lijun; Pan Zhejun; Li Hongying; Xie Qingming; Li Chao

doi:10.11781/sysydz201501109

Volume 37 Issue 1

Turn off MathJax

Article Contents

Article Navigation > PETROLEUM GEOLOGY & EXPERIMENT > 2015 > 37(1): 109-116

Ma Yong, Zhong Ningning, Cheng Lijun, Pan Zhejun, Li Hongying, Xie Qingming, Li Chao. Pore structure of two organic-rich shales in southeastern Chongqing area: Insight from Focused Ion Beam Scanning Electron Microscope (FIB-SEM)[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2015, 37(1): 109-116. doi: 10.11781/sysydz201501109

Citation:

Ma Yong, Zhong Ningning, Cheng Lijun, Pan Zhejun, Li Hongying, Xie Qingming, Li Chao. Pore structure of two organic-rich shales in southeastern Chongqing area: Insight from Focused Ion Beam Scanning Electron Microscope (FIB-SEM)[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2015, 37(1): 109-116. doi: 10.11781/sysydz201501109

Citation:

Ma Yong, Zhong Ningning, Cheng Lijun, Pan Zhejun, Li Hongying, Xie Qingming, Li Chao. Pore structure of two organic-rich shales in southeastern Chongqing area: Insight from Focused Ion Beam Scanning Electron Microscope (FIB-SEM)[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2015, 37(1): 109-116. doi: 10.11781/sysydz201501109

PDF( 10633 KB)

Pore structure of two organic-rich shales in southeastern Chongqing area: Insight from Focused Ion Beam Scanning Electron Microscope (FIB-SEM)

doi: 10.11781/sysydz201501109

1.
Key Laboratory of Shale Gas Resource Exploration of Ministry of Land and Resources of the People's Republic of China (Chongqing Institute of Geology & Mineral Resources), Chongqing 400042, China
2. State Key Laboratory of Petroleum Resources & Prospecting, China University of Petroleum, Beijing 102249, China
3. CSIRO Earth Science and Resource Engineering, Melbourne Vic 3169, Australia

Received Date: 2014-09-29
Rev Recd Date: 2014-12-08
Publish Date: 2015-01-28

Abstract

Abstract

We used a Focused Ion Beam Scanning Electron Microscope (FIB-SEM) to observe the pore structures of the Lower Cambrian Niutitang shale and the Upper Ordovician Wufeng to Lower Silurian Longmaxi shale, sampled in the southeast of Chongqing.Three-dimensional distributions of the nanometer-sized organic-matter pores were reconstructed and their pore structure parameters were analyzed quantitatively. Our work indicated that microfractures between strata, interparticle and intraparticle pores in the mineral matrix, and organic-matter pores were well-developed in the Wufeng-Longmaxi formations. Pores within organic matter form a well-distributed honeycomb like structure with good connectivity, and the pore radius is between 3 and 100 nm. Porosity of organic matter calculated using the FIB-SEM 3-D reconstruction is between 9.13% and 18.42%,and the contribution of organic-matter pores in the total porosity is correlated with the total organic carbon (TOC) content. Dissolution pores and interparticle pores are developed in the Niutitang Formation while organic-matter pores are unevenly distributed. The organic-matter pores are tabular or pinhole with the pore radius between 3 and 25 nm and have poor connectivity. The calculated organic-matter porosity is below 1.59% and has little relationship with the TOC content. So the total porosity in the Niutitang shale mainly comes from the mineral matrix pores. The FIB-SEM results have shown significant differences in the pore structure of the two shales.
- FIB-SEM,
- organic-matter pores,
- three-dimensional reconstruction,
- Niutitang Formation,
- Wufeng-Longmaxi formations,
- southeastern Chongqing area

FullText(HTML)

References(21)

References

[1]	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 mudrockpores[J].AAPG Bulletin,2012,96(6):1071-1098.
[2]	Loucks R G,Reed R M,Ruppel S C,et al.Morphology,genesis,and distribution of nanometer-scale pores in siliceous mudstones of the Mississippian Barnett Shale[J].Journal of Sedimentary Research,2009,79(12):848-861.
[3]	Ambrose R J,Hartman R C,Diaz-Campos M.New pore-scale considerations for shale gas in place calculations[C].Allen,TX:Society of Petroleum Engineers,2010.
[4]	Passey Q R,Bohacs K M,Esch W L,et al.From oil-prone source rock to gas-producing shale reservoir-geologic and petrophysical characterization of unconventional shale-gas reservoirs[J].Beijing:SPE131350,2010:8.
[5]	Sondergeld C H,Ambrose R J,Rai C S,et al.Micro-structural stu-dies of gas shales[C]//SPE Unconventional Gas Conference.Pittsburgh, Pennsylvania:Society of Petroleum Engineers,2010.
[6]	Curtis M E,Sondergeld C H,Ambrose R J,et al.Microstructural investigation of gas shales in two and three dimensions using nanometer-scale resolution imaging[J].AAPG Bulletin,2012,96(4):665-677.
[7]	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.
[8]	Jarvie D,Pollastro R M,Hill R J,et al.Evaluation of hydrocarbon generation and storage in the Barnett Shale,Ft.Worth Basin,Texas[C]//Ellison Miles Memorial Symposium,Farmers Branch.Texas,USA,2004:93-94.
[9]	Wang F P,Reed R M.Pore networks and fluid flow in gas shales[C]//SPE Annual Technical Conference and Exhibition.New Orleans:Society of Petroleum Engineers,2009.
[10]	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 cha-racteristics,formation mechanism and resourcepotential of shale gas in China[J].Petroleum Exploration and Development,2010,37(6):641-653.
[11]	Hao Fang,Zou Huayao,Lu Yongchao.Mechanisms of shale gas storage:implications for shale gas exploration in China[J].AAPG Bulletin,2013,97(8):1325-1346.
[12]	郑和荣,高波,彭勇民,等.中上扬子地区下志留统沉积演化与页岩气勘探方向[J].古地理学报,2013,15(5):645-656. Zheng Herong,Gao Bo,Peng Yongmin,et al.Sedimentary evolution and shale gas exploration direction of the Lower Silurian in Middle-Upper Yangtze area[J].Journal of Palaeogeography,2013,15(5):645-656.
[13]	郭彤楼,张汉荣.四川盆地焦石坝页岩气田形成与富集高产模式[J].石油勘探与开发,2014,41(1):28-36. 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.
[14]	邹才能,朱如凯,白斌,等.中国油气储层中纳米孔首次发现及其科学价值[J].岩石学报,2011,27(6):1857-1864. Zou Caineng,Zhu Rukai,Bai Bin,et al.First discovery of nano-pore throat in oil and gas reservoir in China and its scientific value[J].Acta Petrologica Sinica,2011,27(6):1857-1864.
[15]	韩辉,钟宁宁,焦淑静,等.泥页岩孔隙的扫描电子显微镜观察[J].电子显微学报,2013,32(4):325-330. Han Hui,Zhong Ningning,Jiao Shujing,et al.Scanning electron microscope observation of pores in mudstone and shale[J].Journal of Chinese Electron Microscopy Society,2013,32(4):325-330.
[16]	肖正辉,王朝晖,杨荣丰,等.湘西北下寒武统牛蹄塘组页岩气储集条件研究[J].地质学报,2013,87(10):1612-1623. Xiao Zhenghui,Wang Zhaohui,Yang Rongfeng,et al.Reservoir conditions of shale gas in the Lower Cambrian Niutitang Formation,Northwestern Hunan[J].Acta Geologica Sinica,2013,87(10):1612-1623.
[17]	Curtis M E,Ambrose R J,Sondergeld C H.Structural characterization of gas shales on the micro- and nano-scales[C]//Canadian Unconventional Resources and International Petroleum Conference.Calgary,Alberta:SPE,2010.
[18]	马勇,钟宁宁,黄小艳,等.聚集离子束扫描电镜(FIB-SEM)在页岩纳米级孔隙结构研究中的应用[J].电子显微镜学报,2014,33(3):251-256. Ma Yong,Zhong Ningning,Huang Xiaoyan,et al.The application of Focused ion beam scanning electron microscope (FIB-SEM) to the nanometer-sized pores in shales[J].Journal of Chinese Electron Microscopy Society,2014,33(3):251-256.
[19]	Jarvie D M.Unconventional Shale resource plays:shale-gas and shale-oil opportunities[C]//Proceedings of the PTAC Calgary.Calgary,2008:10-18.
[20]	Reed R M.Nanopores in the Mississippian Barnett Shale:Distribution,morphology,and possible genesis[C]//2007 GSA Denver Annual Meeting.Denver,Colorado,2007.
[21]	Beliveau D.Honey I shrunk the pores[J].Journal of Canadian Petroleum Technology,1993,32(8):15-17.

Relative Articles

Supplements(0)

Cited By

Proportional views

Proportional views

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Citation

XML

PDF-CN

Article Metrics

Article views (1363) PDF downloads(1152)

Pore structure of two organic-rich shales in southeastern Chongqing area: Insight from Focused Ion Beam Scanning Electron Microscope (FIB-SEM)

doi: 10.11781/sysydz201501109

Abstract

References

Proportional views

Catalog

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Proportional views

Related

Pore structure of two organic-rich shales in southeastern Chongqing area: Insight from Focused Ion Beam Scanning Electron Microscope (FIB-SEM)

doi: 10.11781/sysydz201501109

Abstract

References

Proportional views

Catalog

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Proportional views

Related

Export File

Citation

Format

Content