Automatic (computer) correlation of geophysical logs is complicated by stratigraphic thickening (or stretch) from one area to another. Previous algorithms compute the stretch with repeated crosscorrelations of the original logs. Program SPECOR presented in this report uses crosscorrelation of the power spectra of the logs to identify the stretch factor between logs in one simplified operation. Computations are performed in the frequency intervals transformed to a logarithmic scale. Interpolation is required to obtain equally spaced power spectra. Given the stretch, displacement or lag between wells is computed rapidly by correlation processes, without needing to rely on iterative procedures.
Kwon, B. D., Blakely, R. F., and Rudman, A. J., 1978, Fortran program for correlation of stratigraphic time series—part 2: Indiana Geological Survey Occasional Paper 26, 50 p., 5 figs., 4 app.
You may also like:
Can't find what you're looking for? Feel free to contact us directly:
Indiana Geological and Water Survey
1001 E. 10th St.
Bloomington, IN 47405
IGS Return Policy
- Original sales receipt required.
- Returns accepted within 30 days of purchase date.
- Refund will be issued by the same method of payment as purchased.
- Products must be returned in the same new condition as purchased.
- Refunds on custom orders and digital products are NOT allowed.
- Customers are responsible for paying shipping costs to return products.