. Early geophysical papers of the Society of Exploration Geophysicists. Petroleum; Prospecting. 58 G. H. WESTBY limestone or its contact with the Chattanooga shale. A velocity survey made six miles to the east of this well reveals similar data. Since our velocity information is never accurate for the identification of a re- flection closer than ± 20 feet, it would be entirely possible for this reflection to come from a harder bed of limestone in the base of the Mississippi lime. However, the writer was present at the drilling of the Mississippi lime in both wells in this vicinity and found no
. Early geophysical papers of the Society of Exploration Geophysicists. Petroleum; Prospecting. 58 G. H. WESTBY limestone or its contact with the Chattanooga shale. A velocity survey made six miles to the east of this well reveals similar data. Since our velocity information is never accurate for the identification of a re- flection closer than ± 20 feet, it would be entirely possible for this reflection to come from a harder bed of limestone in the base of the Mississippi lime. However, the writer was present at the drilling of the Mississippi lime in both wells in this vicinity and found no evi- dence either in the samples or in the drilling to warrant the belief that. Fig. 9 a reflection could be coming from a harder limestone stratum in the base of the Mississippi lime section. It is believed probable, therefore, that this reflection is coming from the contact of the Mississippi lime and the Chattanooga shale which theoretically should afford an especially good reflecting interface. The Viola limestone reflection therefore arrives in phase with this reflection and can not in this area be readily separated from it. RESULTS OF ST. CYR NO. I WELL The St. Cyr No. 1 well encountered the Viola limestone at a depth of 2,793 feet, or a sub sea datum of —2,108. This is within 8 feet of 302. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Society of Exploration Geophysicists. Tulsa
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