Results 51 to 60 of about 26,237 (314)

Spatially resolved 23Na magnetic resonance dispersion measurement in porous media

The Canadian Journal of Chemical Engineering, EarlyView.
Quantitative 23Na MRI was employed to analyze dispersion in realistic core plug samples and was compared with the conventional breakthrough curve. 23Na MRI provided a more effective aassessment of core plug heterogeneity than the conventional method. Abstract Tracer tests are widely used in the petroleum industry to assess reservoir core plugs, relying
Rheya Rajeev, Mohammad Sadegh Zamiri, Andrés Ramírez Aguilera, Florea Marica, Laura Romero de Zerón, Bruce J. Balcom   +5 more
wiley   +1 more source

Review and prospects of shear test of bolted rock joints

Deep Underground Science and Engineering, EarlyView.
The laboratory shear test equipment, test method, and numerical simulation of bolted rock joints were summarized. The shortcomings and limitations of the current research were analyzed, and the research prospects were proposed. Abstract Rock bolting is a critical approach in geotechnical engineering for supporting weak rocks.
Shulin Ren, Fan Yang, Manchao He, Yong Yuan, Zhigang Tao   +4 more
wiley   +1 more source

Indicators of hot fluid migration in sedimentary basins: evidence from the UK Atlantic Margin [PDF]

, 2003
Microthermometric, petrographic and isotopic methods have been used to detect evidence for hot fluid flow in Mesozoic and Tertiary sediments from the NW UK continental margin, West of Shetland. New data presented here show that temperatures are hotter by
H. L. Wycherley, J. Parnell, Wycherley, H.L., Boyce, A.J., Watt, G.R., Chen, H., H. Chen, G. R. Watt, Parnell, J., A. J. Boyce   +9 more
core  

Shear behavior of bolt–grout interfaces under constant normal stiffness: Influence of grout strength and thickness

Deep Underground Science and Engineering, EarlyView.
The effects of grout strength and thickness on the shear behavior of bolt–grout interfaces (BGI) under constant normal stiffness conditions are investigated. Shear strength, failure modes, and acoustic emission characteristics are examined. The findings reveal that grout strength exerts a significantly greater influence on BGI shear strength and ...
Sunhao Zhang, Dongqi Shang, Yujing Jiang, Jinge Zhang, Hongbin Chen, Tianqi Jiang   +5 more
wiley   +1 more source

Ornamental sandstones used in Ciudad Rodrigo, Salamanca: petrographic and chemical characterization of the quarry materials

Materiales de Construccion, 2002
Petrographic and chemical study of the Ciudad Rodrigo (province of Salamanca, Spain) sandstones reveals the existence of several types of stone (Red, Brown, Striped, Nodular and White). To some extent all of them have been used in the construction of the
M. J. Varas, E. Molina, M. A. Vicente
doaj   +1 more source

The evolution of a sand-rich basin-fill sequence in the Pendleian (Namurian,E1c)of North-West England [PDF]

, 1988
The Bowland and Lancaster Fells Basins of north-west England contain a Pendleian El, sequence up to 650m thick, most of which is coarse clastic material.
Sims, Andrew Peter
core  

Generalized Matsuoka–Nakai criterion considering hydrostatic pressure dependence in the brittle–ductile region

Deep Underground Science and Engineering, EarlyView.
Three sets of strength data were selected, including hydrostatic pressure independent within the brittle region (HPI‐B), hydrostatic pressure dependent within the brittle region (HPD‐B), and hydrostatic pressure dependent within the brittle–ductile region (HPD‐BD). For HPI type, the failure envelope within the deviatoric plane remains constant.
Jiacun Liu, Junjie Xiao, Dongping Liu, Ying Xu   +3 more
wiley   +1 more source

An analytical comparison of two commercial consolidating products applied to eocene sandstones from 16th and 19th century monuments in San Sehastián, northern Spain

Materiales de Construccion, 2002
The conservation of buildings in the Basque Country made of Eocene sandstone is somewhat problematical, because this type of rock is relatively unstable.
F. García-Garmilla, I. Rodríguez Maribona, M. Cano, M. Zalbide, J. A. Ibáñez-Gómez, E. Osa-Chans, S. Garín   +6 more
doaj   +1 more source

Distribution of diagenetic alterations in glaciogenic sandstones within a depositional facies and sequence stratigraphic framework: Evidence from the Upper Ordovician of the Murzuq Basin SW Libya

, 2006
The spatial and temporal distribution of diagenetic alterations has been constrained in relationship to depositional facies and sequence stratigraphy of the Upper Ordovician glaciogenic quartzarenite sandstones in the Murzuq Basin, SW Libya, which were ...
Ramseyer, Karl, Mansusrbeg, Howri, El-Ghali, Mohamed, Morad, Sadoon, Al-Aasm, Ihsan, El-ghali, Mohamed Ali Kalefa,, Mansurbeg, Howri,, Morad, Sadoon,   +7 more
core   +1 more source

Water sensitivity of sandstones containing swelling and non-swelling clays [PDF]

, 1993
The study presented here focuses on the phenomenon of water sensitivity of sandstones containing swelling and nons-welling clays. This paper describes results of an ongoing investigation on the mechanisms of permeability reduction in sandstones ...
Vaidya, Ravimadhav N., Reed, Marion G., Fogler, H. Scott, K.Krishna Mohan, Ravimadhav N. Vaidya, Marion G. Reed, Mohan, K. Krishna, H.Scott Fogler   +7 more
core   +1 more source