This document is an update of API Technical Report 10TR1, First Edition (June 1996). Great effort has been made to ensure that new technical developments are incorporated, and different views and perspectives are represented by contributions from both operators and service companies. Additionally, the document's relevance to field personnel has been improved by expanding the sections on tool capability, selection, running procedure and log QC. In addition, there is a discussion about how to best incorporate log-interpretation and cementing data into an overall determination of zonal isolation.
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