The Schlumberger "chartbook" was initially developed to correct raw measurements to account for environmental effects and to interpret the corrected measurements.
Although software may be more effective in deriving results, especially in complex well situations, the chartbook still serves two primary functions, for training and sensitivity analysis.
Charts related to measurements that are no longer performed are not included in this chartbook. However, because many oil and gas companies use logs acquired years or even decades ago, a second chartbook, Historical Log Interpretation Charts, contains these old charts. Contact your Schlumberger representative for information on the historical chartbook.
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