Short surface‐to‐surface refraction lines define the top of a shallow salt dome previously located by reflection methods. A map is made from the results of a number of longer refraction lines radiating from the center of the dome. The increased accuracy of this system is primarily dependent upon the accurate determination of velocities and distances. Flank wells are used for further refraction shooting which yield more accurate velocity information and more detailed salt profiling. A map from this integrated information permits exploitation at a minimum risk, even though every location is essentially a wildcat.
This paper presents a historical record of the geophysical activity in the area of the La Gloria Field. The successive stages of geophysical exploration were: Torsion balance survey 1934–1935; correlation reflection seismograph survey 1936; dip reflection seismograph survey, 1938; correlation reflection seismograph survey, 1938; gravity meter survey, 1943–1944. The discovery well, Magnolia’s Sam Maun No. 1, was drilled and completed in 1938–1939, producing initially 165 barrels per day of 65° gravity distillate and 5,646,000 cubic feet of gas through a 5/16 inch choke. Oil and gas in the La Gloria Field are being produced from sands in the Frio formation of Oligocene age. There are a number of sands producing gas‐distillate. Several flank wells produce oil. The field has been unitized and a cycling plant is engaged in processing the gas‐distillate.
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