Early geophysical papers of the Society of Exploration Geophysicists . earlygeophysical00soci Year: 1947 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
Early geophysical papers of the Society of Exploration Geophysicists . earlygeophysical00soci Year: 1947 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
Size: 1612px × 1240px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
