Geophysical tutorial: Well-tie calculus

2014 ◽  
Vol 33 (6) ◽  
pp. 674-677 ◽  
Author(s):  
Evan Bianco

Welcome to the third tutorial in this series. Evan Bianco has put together a terrific look at 1D synthetic seismograms — the critical connections between well data and seismic data that make geologic interpretation possible. Most of us use proprietary software for this part of the workflow, but do you really know what's going on in there? My challenge is: Take a couple of hours, install IPython from ipython.org , and see if you can work your way through Bianco's Notebook at github.com/seg/tutorials — I guarantee you will learn something. If you get stuck, please reach out to him.

1995 ◽  
Vol 42 ◽  
pp. 34-46
Author(s):  
Kim Gunn Maver

Zechstein carbonates in Southern Jutland, Denmark, have been explored by 10 wells since 1952, and a total of more than 2000 km of 2D seismic data has been acquired by various contractors. Seismic modelling, based on all the well data, is used as an aid to predict the lateral distribution of porous Zechstein carbonate intervals from the seismic data. ID seismic modelling is used to define the maximum number of intervals detected by the seismic sections at well locations. The ID seismic modelling results are also used to derive 2D acoustic impedance models and corresponding synthetic seismograms. The seismic modelling results illustrate a number of diagnostic reflection patterns associated with the porous carbonate intervals. The predicted distribution of porous carbonate intervals is, however, found to be uncertain, as thickness and porosity variations of each interval cannot be distinguished. Furthermore, thin porous carbonate intervals are not detected by the seismic sections, and the seismic reflection patterns indicating the presence of porous carbonate intervals can be associated with other lithologies. Porous Ca-la, Ca-lb, Ca-2 and Ca-3 carbonate intervals are found to be detected by the seismic sections only in the Zechstein platform area, and only the porous Ca-2 carbonate interval can be mapped


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