A contouring program has been developed in Pascal for the Apple II computer using irregularly spaced data. The program plots contours and data points on the CRT and dumps the resulting map with headings on a 440 IDS printer. The contouring package is the main program of a larger system being developed to explore for oil in mature areas. The package will include a file management program for well data files, trend surface and residual surface mapping, log evaluation and mapping of log parameters, and a program to evaluate drilling deals using probabilities.

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