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Tuesday, January 9 2018

11:30 AM - 1:30 PM
Tuesday, Jan 9, 2018 11:30 a.m.

Good Cores Gone Bad: Recognizing and Correcting Erroneous Core Data using Wireline logs, with Geological Revelations and Associated Implications therein—a case study

Joe Bauman

In general, and almost universally, core data is considered “ground truth” and is the dataset to which log values are calibrated. Considering the perceived value of a core report, a core report that provides incorrect values could have significant detrimental impacts on apparent economics and go-forward decision making in exploration. Here I present a case in which the core data for a well, although not readily apparent, are demonstrably erroneous. Wireline logs, production, core-processing methodology, and core observations provide clues and evidence that not only identify when the core report is incorrect, but also enable one to “correct” the core report data and extract intrinsic, perhaps localized, characteristics of the cored interval. This case study is an example from the Bakken Fm of the Williston Basin in North Dakota; however, the learnings from this example have universal applicability—particularly the key learning, which is “Use all the data.”