Method and application of Faciolog technique to geological problems

The Multiwell Faciolog (mark of Schlumberger) computer process is a data-reduction technique that uses multivariate analysis to integrate data from wireline logs, core data, and geologic knowledge into a geologically significant display of electrofacies. Electrofacies are defined by Serra and Abbott as the set of log responses that characterizes a sediment and permits the sediment to be distinguished from others. The advantage of the Multiwell Faciolog technique is that voluminous data, including wireline, core, and geologic information, can be integrated into one or two key displays. This program is flexible and allows the interpreter to adjust and modify the data base, as necessary, with the addition of each new well. The data base does not require a unique data set and can be constructed from open-hole logs, cased-hole logs, or computed logs common to the study wells. The final cross-sectional displays can be an aid in tracing geologic characteristics from well to well.