--> Abstract: Multi-Well Petrophysical Processing Using Symbiolog: An Example Using Both Old and New Well Logs from the Monterey Formation; San Joaquin Valley, by D. M. Olson and W. R. Berry II; #90945 (1997).
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Abstract: Multi-Previous HitWellNext Hit Petrophysical Processing Using Symbiolog: An Example Using Both Old and New Previous HitWellNext Hit Logs from the Monterey Formation; San Joaquin Valley

OLSON, DEBORAH M. AND WILLIAM R. BERRY II

As part of a DOE-funded demonstration reservoir characterization project, a petrophysical field study project was undertaken in the Monterey Formation in the vicinity of the Pioneer and Los Lobos Fields, T11N/R23W, Kern County, California. The dataset consisted of about 45 wells including old E-logs (1930s through 1950s), IES logs (1960s), and modern logging suites (1980s to present). A conventional Previous HitanalysisNext Hit was performed on the 12 modern wells to derive values for lithology and porosity, and the results were used to calibrate an empirical model to obtain the same parameters from the old E-Previous HitlogNext Hit wells. The Previous HitanalysisNext Hit on the wells with porosity logs was calibrated to core data using a geologically-based analytical approach to parameter selection, and a close match was obtained. The extension of the model to the E-Previous HitlogNext Hit only wells required careful interpretation by a geologist/petrophysicist, but with close attention to parameter selection quite meaningful results were obtained on the old wells through the Monterey interval. The work required a complex processing Previous HitsequenceNext Hit involving several custom programs to calculate input curves for the main petrophysical model, which was made possible using the tools available in Symbiolog. Symbiolog is an advanced Previous HitlogNext Hit Previous HitanalysisNext Hit program that functions as an add-on to many other petrophysical systems, providing enhanced processing features, a user programming module, and multi-Previous HitwellNext Hit capability even to systems that are single-Previous HitwellNext Hit oriented. For this project, Symbiolog was used in conjunction with the Petrolog Previous HitlogNext Hit Previous HitanalysisNext Hit system from Crocker Data Processing, which was used for all Previous HitlogNext Hit input/output, graphics, database, and Previous HitlogNext Hit curve manipulation. The results of this project has significance for many fields in California, since it shows that petrophysical Previous HitanalysisNext Hit of both new and old wells can be done efficiently and with a high degree of accuracy. This will greatly enhance the accuracy and efficiency of reservoir characterization and reservoir modeling work in the typical field that has many wells with old or limited Previous HitlogTop suites.

Search and Discovery Article #90945©1997 AAPG Pacific Section Meeting, Bakersfield, California