Nanogeosciences: Research History, Current Status, and Development Trends

Ju, Yi‐Hsu; Huang, Cheng; Yan, Sheng; Wan, Quan; Lu, Xiancai; Lu, Shuangfang; He, Hong‐Ping; Wang, Xueqiu; Zou, Caineng; Wu, Jianguang; Liu, Hailing; Shao, Longyi; Wu, Xiuling; Chao, Hongtai; Liu, Qinfu; Qiu, Jieshan; Wang, Min; Cai, Jianchao; Wang, Guochang; Sun, Yue

doi:10.1166/jnn.2017.14436

Cited by 68 publications

(17 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pore networks of sediments in petroleum systems control the storage of adsorbed and free gas and fluid flows, which determine whether the sediments can be a reservoir or a cap rock. There have been studies on how pore structures are affected by lithology, mineralogy, total organic carbon (TOC), thermal maturity, fabric and diagenetic history [3][4][5][6][7][8][9], and how pore structures control the gas storage and migration [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

The effects of solvent extraction on nanoporosity of marine-continental coal and mudstone

Cai

et al. 2019

Fuel

Self Cite

View full text Add to dashboard Cite

The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that: • a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.

show abstract

Section: Introductionmentioning

confidence: 99%

The effects of solvent extraction on nanoporosity of marine-continental coal and mudstone

Cai

et al. 2019

Fuel

Self Cite

View full text Add to dashboard Cite

show abstract

“…Nanocrystalline materials are widespread in the Earth's atmosphere, biosphere, and in the subsurface [1][2][3][4][5], including in principal slip zones (PSZs) within natural faults [6][7][8]. PSZs are zones of localized shear deformation that (have) accommodate(d) the bulk of displacement in the cores of upper-crustal faults [9,10], which suggests that the physical properties of the ultrafine(nano)-grained fault rock within PSZs plays an important role in controlling fault mechanical behavior or fault rheology.…”

Section: Introductionmentioning

confidence: 99%

“…In view of the generality of this nanograin size effect, it is important to consider the potential physical implications of nanogranular fault rock. Despite the emerging awareness on the importance of nanophase geomaterials in Earth sciences [1][2][3][4][5][6][7][8], their prevalence in upper-crustal faults and potential role in natural earthquake cycles remains insufficiently investigated. [15]), with a rough depth range indicating fault deformation regimes, the seismogenic zone, and (c) velocity dependence or intrinsic fault stability regimes.…”

Section: Introductionmentioning

confidence: 99%

Nanocrystalline Principal Slip Zones and Their Role in Controlling Crustal Fault Rheology

2019

View full text Add to dashboard Cite

Principal slip zones (PSZs) are narrow (<10 cm) bands of localized shear deformation that occur in the cores of upper-crustal fault zones where they accommodate the bulk of fault displacement. Natural and experimentally-formed PSZs consistently show the presence of nanocrystallites in the <100 nm size range. Despite the presumed importance of such nanocrystalline (NC) fault rock in controlling fault mechanical behavior, their prevalence and potential role in controlling natural earthquake cycles remains insufficiently investigated. In this contribution, we summarize the physical properties of NC materials that may have a profound effect on fault rheology, and we review the structural characteristics of NC PSZs observed in natural faults and in experiments. Numerous literature reports show that such zones form in a wide range of faulted rock types, under a wide range of conditions pertaining to seismic and a-seismic upper-crustal fault slip, and frequently show an internal crystallographic preferred orientation (CPO) and partial amorphization, as well as forming glossy or "mirror-like" slip surfaces. Given the widespread occurrence of NC PSZs in upper-crustal faults, we suggest that they are of general significance. Specifically, the generally high rates of (diffusion) creep in NC fault rock may play a key role in controlling the depth limits to the seismogenic zone.In this paper, we aim to elucidate the significance of nanocrystalline PSZs in Earth's upper crust. We start with background on fault mechanics and upper-crustal seismogenesis, and summarize some key physical properties of nanophase materials which, when applied to fault rock, are expected to be of major importance in controlling fault strength and stability. We go on to review the micro-and nanostructural characteristics of natural and experimentally-formed nanocrystalline PSZs, and list reports from the literature of PSZs characterized by grains <100 nm in size. Our work demonstrates that nanocrystalline PSZs form under a wide range of conditions pertaining slow (a-seismic) and fast (co-seismic) upper-crustal fault slip. Also, we observe that they are frequently characterized by an internal crystallographic preferred orientation, and by the presence of amorphous materials and/or glossy fault plane interfaces known as "mirror-slip" surfaces. Given the abundant observations of nanocrystalline PSZs in field exposures of faults, as well as in experiments, we suggest that they are of general importance to upper-crustal fault deformation. The physical properties of nanocrystalline fault rock may play a key role in natural earthquake cycles, especially in controlling the depth distribution of upper-crustal seismicity. Fault Zones, Earthquakes, and the Seismogenic ZoneThe presence of long-lived, localized zones of shear deformation in the crust, or fault zones, implies that the fault rocks within are weaker than the surrounding country rocks and that their weakness is persistent [14,15]. The strength of the upper-crust is classically approximated using a Cou...

show abstract

“…Many high-resolution techniques have been applied to study the pore structures in shale with low porosity and low permeability, large parts of which are nanoscale pores (pore diameter of less than 100 nm). Based on previous studies, all of the following methods have achieved good results: Scanning electron microscope (SEM), Nano-CT, helium ion microscope (HIM), mercury intrusion, gas adsorption, nuclear magnetic resonance (NMR), and small-angle and ultra-small-angle neutron scattering (SANS and USANS) [8,[23][24][25][26][27][28][29]. In particular, SEM and N 2 adsorption are the most frequently used techniques, and both meet the demands of direct observation and quantitative analysis [30].…”

Section: Introductionmentioning

confidence: 99%

Nano-Scale Pore Structure and Fractal Dimension of Longmaxi Shale in the Upper Yangtze Region, South China: A Case Study of the Laifeng–Xianfeng Block Using HIM and N2 Adsorption

Huang

Zhu

et al. 2019

Minerals

Self Cite

View full text Add to dashboard Cite

This paper tries to determine the key evaluation parameters of shale reservoirs in the complex tectonic provinces outside the Sichuan Basin in South China, and also to target the sweet spots of shale reservoirs accurately. The pore-structure characteristics of the Lower Silurian Longmaxi shale gas reservoirs in Well LD1 of the Laifeng–Xianfeng Block, Upper Yangtze region, were evaluated. N2 adsorption and helium ion microscope (HIM) were used to investigate the pore features including pore volume, pore surface area, and pore size distribution. The calculated results show good hydrocarbon storage capacity and development potential of the shale samples. Meanwhile, the reservoir space and migration pathways may be affected by the small pore size. As the main carrier of pores in shale, organic matter contributes significantly to the pore volume and surface area. Samples with higher total organic carbon (TOC) content generally have higher porosity. Based on the Frenkel–Halsey–Hill equation (FHH model), two different fractal dimensions, D1 and D2, were observed through the N2 adsorption experiment. By analyzing the data, we found that large pores usually have large values of fractal dimension, owing to their complex pore structure and rough surface. In addition, there exists a good positive correlation between fractal dimension and pore volume as well as pore surface area. The fractal dimension can be taken as a visual indicator that represents the degree of development of the pore structure in shale.

show abstract

Nanogeosciences: Research History, Current Status, and Development Trends

Cited by 68 publications

References 0 publications

The effects of solvent extraction on nanoporosity of marine-continental coal and mudstone

The effects of solvent extraction on nanoporosity of marine-continental coal and mudstone

Nanocrystalline Principal Slip Zones and Their Role in Controlling Crustal Fault Rheology

Nano-Scale Pore Structure and Fractal Dimension of Longmaxi Shale in the Upper Yangtze Region, South China: A Case Study of the Laifeng–Xianfeng Block Using HIM and N2 Adsorption

Contact Info

Product

Resources

About