Retrieval and Sampling of Cores

Abstract

In the evaluation and analysis of cores, there is usually a division of responsibilities at or away from the wellsite. On some occasions the logging crew may be required to recover, evaluate the core, sample it and perform complete core analysis. In such cases it is recommended that two logging geologists work together, dividing the various tasks between them in order to complete the job speedily and efficiently. Since coring operations involve relatively short on-bottom intervals separated by longer-than-normal trip times, it is possible to do this without logging geologists working for excessively long periods or an unfair distribution of work. The Trailer Captain should organize duty and rest periods so that extra manpower is available when required. If, in his opinion, extra personnel or overtime credits are justified, the client’s representative and local office should be informed.