The main objective of this paper is to present a certification process to achieve the reliability of well log data for any user, independently where or when the log was ran. For example, the analogical log data (old data) is digitally recaptured and processed through quality control criteria's, edited and spliced curve by curve, where all technical steps are documented in the corresponding digital file in order to provide the user the details of how the technical process was used and made. Finally, a digital signature certifies all files. At that moment anyone can use the certified products for interpretations, correlations or petrophysical evaluations.
As it is the case in most oil producing companies, two log data generation are present in Mexico: analogical and digital. Analogical process was initiated in 1904, when the first well was drilled, and the digital process began in 1979 through the "Cyber System Unit" used by Schlumberger. Those two generations, analogical and digital log data, demand new technologies and process to equalize the quality of old and modern data in order to use and manage this information in applications and databases.
The certification process includes on line log inventory using the log and services codification published by The American Petroleum Institute (API), log quality control routine for "Digital Log Interchange Standard" (DLIS), "Log Information Standard" (LIS) and "Log ASII Standard" (LAS), including: originals, edited and spliced logs. The authenticity and reliability of each file is warranted by a digital signature, it specifies who made the process and who accepted the final product.
The certification process was designed to equalize the quality of analogical and digital log generations, to establish the log reliability for any user and, finally to improve the data management. All these factors impact positively log data base preparation for project execution.