Evaluation of Programmed Algorithms for Computer-Generated Contour Maps

Scott R. Green, Arthur E. Burford

In the past, most contour maps used in the oil and gas industry were completed without the assistance of computers. However, with the recent advent of highly powerful as well as affordable microcomputers and compatible software, geologists have the potential to create more efficient and accurate computer-generated contour maps. Using a microcomputer, plotter, and software, such as GeoGraphix WellBase, allows for state of the art computerized mapping proficiency. Detailed examination of the statistics inherent to the triangulation, weighted moving average, weighted projected slope, and least square programmed mapping algorithms provides specific guidelines for correct applications. Comparisons between Clinton sandstone structural maps of clustered, random, and evenly distr buted data drawn manually and maps contoured by computer illustrate strengths and weaknesses of programmed algorithms. If the geologist understands the appropriate conditions by which to exercise the correct computer-programmed mapping algorithms, computer-generated maps will serve as an efficient, accurate, and powerful tool for the oil and gas industry.

AAPG Search and Discovery Article #91041©1987 AAPG Eastern Section Meeting, Columbus, Ohio, October 7-10, 1987.