Abstract
Maps constructed from seismic data represent subsurface structures in terms of two-way transit time. Wireline logs provide depth of formation tops at well locations. The best representation of a subsurface horizon should combine both measurements. Kriging is an ideal tool for merging seismic and log data.
This case history describes the mapping of a reef in north Texas. Seismic data include three common depth point (CDP) lines and a large number of single-fold records. Wireline logs, including a vertical seismic profile (VSP), are available in 11 wells.
The first step is the geostatistical analysis of seismic data. The empirical semivariogram is drawn from several hundred shot points, and a theoretical model is fitted. This semivariogram is used to construct a time grid.
In the second step, wireline logs are correlated to the seismic sections with the help of the VSP data. A time-depth relationship is established and applied to the time grid to yield a “drift” for the kriging of the depth data. The final output is a depth grid used to generate a contour map.
Keywords
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
P. Delfiner, J.P. Delhomme, and J. Pelissier-Combescure: “Application of Geostatistical Analysis to the Evaluation of Petroleum Reservoirs with Well Logs,” paper presented at the 1983 SPWLA Annual Logging Symposium, June 27–30.
Milton B. Dobrin: “Introduction to Geophysical Prospecting,” McGraw Hill, 1976.
Bob A. Hardage: “Vertical Seismic Profiling,” Geophysical Press, 1983.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1987 D. Reidel Publishing Company, Dordrecht, Holland
About this chapter
Cite this chapter
Moinard, L. (1987). Application of Kriging to the Mapping of a Reef from Wireline Logs and Seismic Data; A Case History. In: Matheron, G., Armstrong, M. (eds) Geostatistical Case Studies. Quantitative Geology and Geostatistics, vol 2. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3383-5_5
Download citation
DOI: https://doi.org/10.1007/978-94-009-3383-5_5
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-8018-7
Online ISBN: 978-94-009-3383-5
eBook Packages: Springer Book Archive