Lyell Collection
Geological Society, London, Special Publications
Lyell Centre  |   Lyell Collection  |   Subscriptions   |   Geological Society  |   Email alerts  |   Online bookshop  |   Help

Keywords:
Author:
Advanced search>>
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow Request Permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Luthi, S. M.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation
Geological Society, London, Special Publications; 1990; v. 48; p. 3-10;
DOI: 10.1144/GSL.SP.1990.048.01.02
© 1990 Geological Society of London

Sedimentology

Sedimentary structures of clastic rocks identified from electrical borehole images

Stefan M. Luthi

Schlumberger-Doll Research, Ridgefield, CT 06877, USA

High-resolution electrical borehole images are obtained from the Formation Micro Scanner* (FMS) by scanning the borehole wall with arrays of small electrodes pressed against the borehole surface. The images provide detailed sedimentary structural information from clastic rocks which is of great value for geological and reservoir modelling as illustrated by two case studies. Analysis of electrical borehole images through a Pennsylvanian deltaic cycle from Texas shows different types of bedding surfaces, including channel base scours, cross-bedding, slump folds and growth-faulting. The ensemble of the data constrains the subsurface geometry of the reservoir and helps to establish a depositional model. Thresholding may produce a segmentation of sand/shale images. In the aeolian Rotliegendes of the North Sea, electrical borehole images provide a vertical succession of facies, dip and azimuth measurements of interdune layers, bounding surfaces and foresets, as well as thickness measurements of the cross-bedded sets. Statistical modelling using the data indicates scale-invariant crescentic bedforms, and describes sizes, shapes and layering of the cross-bedded sandstones. Computer-aided design tools are used for forward-modelling of structures observed on borehole images in order to test possible interpretation hypotheses. The use of graphic workstations greatly facilitates the interpretation process.


* Mark of Schlumberger.




This article has been cited by other articles:


Home page
 Petroleum GeoscienceHome page
S. M. Luthi, D. M. Hodgson, C. R. Geel, S. S. Flint, J. W. Goedbloed, N. J. Drinkwater, and E. P. Johannessen
Contribution of research borehole data to modelling fine-grained turbidite reservoir analogues, Permian Tanqua-Karoo basin-floor fans (South Africa)
Petroleum Geoscience, 2006; 12: 175 - 190.
[Abstract] [Full Text] [PDF]

Home page
 Geological Society, London, Special PublicationsHome page
M. Lovell, P. Jackson, R. Flint, and P. K. Harvey
Fracture mapping with electrical core images
Geological Society, London, Special Publications, 2005; 240: 107 - 115.
[Abstract] [PDF]

Home page
 Geological Society, London, Special PublicationsHome page
S. E. Prensky
Advances in borehole imaging technology and applications
Geological Society, London, Special Publications, 1999; 159: 1 - 43.
[Abstract] [PDF]

Home page
 Geological Society, London, Special PublicationsHome page
M. A. Lovell, P. K. Harvey, T. S. Brewer, C. Williams, P. D. Jackson, and G. Williamson
Application of FMS images in the Ocean Drilling Program: an overview
Geological Society, London, Special Publications, 1998; 131: 287 - 303.
[Abstract] [PDF]