With the advent of large-capacity computer files, interactive languages for retrieval of large data bases, and low-cost effective microcomputers, the approach to stratigraphic analysis has been dramatically improved. In terms of immediate payoff, the computer assumes the role of retriever and data presenter, while the geologist concentrates on analysis of retrieved data. The biggest benefit of these new approaches is a measurable increase in productivity for the geologist.

Through use of the computer, gathering and interpretive data from sample logs are greatly facilitated. With the computer, logs are encoded electronically for access by the geologist via a computer terminal, and analysis of the data is accomplished interactively. The process obviates the need for the time-consuming process of locating the appropriate logs, hanging them for analysis, and researching each log to locate appropriate intervals for correlation and interpretation. Recent studies indicate that through computerized approaches, time required for these steps is vastly diminished, and resulting productivity is 40-80% greater than with conventional manual methods.

A by-product of this approach results from the data being created in a form that lends itself to graphic presentation upon demand by the geologist. This avoids the time-consuming delays inherent in interrelating with the computing department for mapping requests to ensure that the results of the analysis are as expected. With the computer, many kinds of maps become practical to produce from the terminal, including base maps, cross sections, and lithofacies, structures, and isopach maps.

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