ANNUAL MEETING, 1935 
SOCIETY OF PETROLEUM GEOPHYSICISTS 
WICHITA, KANSAS 
THURSDAY, MARCH 21, AVIATION ROOM 
(THuRs., 1:45-4:45 P.M., Society of Petroleum Geophysicists, E. E. Rosaire, presiding.) 
1. John W. Flude, Portable Storage Magazines for Dynamite and Caps. 
2. Roy Hightower, Premature Explosions in Seismic Explorations. 
3. G. H. Loving and G. H. Smith, Explosives and Electric Blasting Caps for Geo- 
physical Prospecting. 
4. P.W. Klipsch, Performance of Oscillograph Amplifiers to Transient Shock Excitation. 
A qualitative answer is offered to the question. ‘‘What is desirable transient re- 
sponse?”’ The correlation between transient and steady state performance is discussed 
with the purpose of gaining a knowledge of the former from a measurement of the 
latter. By separating the elements of an amplifier system and measuring steady state 
performance. of each component, any corrections necessary may be determined and 
applied to the proper element. The basis for design and adjustment is improved and 
testing is facilitated by the methods outlined. 
5. E. E. Rosaire, Strategy and Tactics in Geophysical Exploration for Petroleum. 
A review of geophysical prospecting for petroleum with emphasis upon limitations 
of the tactics developed.sAn attempt is made to examine the strategical requirements of 
today with regard to the need for developing new exploration methods. 
FRIDAY, MARCH 22 
(FRI., 9:00-12:30 P.M., Society of Petroleum Geophysicists, F. Goldstone, presiding.) 
1. Donald C. Barton, Delimitation of Cap by Torsion Balance, Hoskins Mound, Bra- 
zoria County, Texas. 
The survey and the quantitative calculations were made for the Freeport Sulphur 
Company to determine the limits and depth of the cap in the unexplored parts of the 
Hoskins Mound dome. The crest and the southwest quadrant of the dome were known 
from exploratory wells and from producing wells. No wells had been drilled below the 
1,000-foot contour from the northwest radius clockwise to the southeast radius. Thir- 
teen radial torsion balance profiles were run. Office trial-and-error calculations were 
made by the ordinary formula for the gradient effect of a finite horizontal prism to 
determine the most probable form of the cap which would produce the observed gradi- 
ent anomaly. The trial forms of the cap were tied to part of the known drilling data. 
A net of subsequent wells has shown the degree of accuracy of those predictions. 
2. Paul Weaver, Irregularities in Torsion-Balance Surveys from Near-Surface Effects: 
Examples are given showing that even in flat country irregular torsion balance 
readings have been obtained and suggestions are made for minimizing these effects and 
possible contributing causes are discussed. 
3. FE. W. K. Andrau, Schlumberger Correlations and Tectonic Problems on Gulf Coast 
Salt Domes. 
Schlumberger electrical well surveying enables the petroleum engineer to improve 
his degree of accuracy when correlating wells. This is illustrated by cross sections, which 
also show the accuracy with which faulting can be determined and predicted in future 
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