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The data processing system discussed encompasses all the phases of data recording, computing, and plotting. However, data recording still limits the machine approach because most manual methods are too slow and prone to error.
Jersey Production Research Company has developed and put into operation a digitizer, which is a desk-sized instrument designed to transfer basic stratigraphic data and their respective depths from well log overlays to punch cards. This unit has been incorporated into the machine system for processing geological data. The use of the digitizer reduces by one-half the time necessary for data tabulation, and increases the accuracy and efficiency of machine processing. The digitizer allows for the preservation of vertical positions (depths) for a maximum of 40 variables on one overlay. These variables, including lithologic features, oil shows, and (or) fluid contents, porosity ranges, and formation tops, are computed and plotted prior to the preparation of stratigraphic maps.
A specially designed computer program provides the necessary link between the digitizer and the IBM 650; it processes the data and computes thicknesses, subsea depths, ratios, and percentages in a form suitable for machine plotting of exploration maps. For subsequent studies involving correlation changes, the basic geological data, which are stored on cards, can be retrieved and reworked without retabulation.
Savings in time and cost can not be estimated accurately, but they are more than sufficient to make geological data processing practical. The chief benefit of machine processing of exploration data is that it provides the geologist with data quality and several courses of investigation previously considered infeasible.
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