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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 46 (1962)

Issue: 2. (February)

First Page: 283

Last Page: 283

Title: Machine Digitizing and Previous HitProcessingNext Hit of Geological Data Obtained from Well Logs: ABSTRACT

Author(s): Fred J. Wagner

Article Type: Meeting abstract

Abstract:

Integration of electronic machines for the efficient recording, computing, and plotting of exploration data has reduced the time, cost, and number of errors inherent in the manipulation of data.

The data Previous HitprocessingNext Hit 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 Previous HitprocessingNext Hit 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 Previous HitprocessingNext Hit. 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.

The final step in the machine system is cross-sectioning, plotting, and contouring the computed data for visual presentation.

Savings in time and cost can not be estimated accurately, but they are more than sufficient to make geological data Previous HitprocessingNext Hit practical. The chief benefit of machine Previous HitprocessingNext Hit of exploration data is that it provides the geologist with data Previous HitqualityTop and several courses of investigation previously considered infeasible.

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Copyright 1997 American Association of Petroleum Geologists