OKLAHOMA ACADEMY OF SCIENCE 85 



limestone, which outcrops from Coffeyville south to Nowata. The 

 Wiser sand, a hundred feet lower than the Wayside, lies under the 

 Altamont limestone, which is the higher of the two limestone scarps 

 near Wimer, Oklahoma. Both the Wayside and Wiser sands are 

 almost unbelievable in their range in thickness, the latter varying 

 from more than sixty feet to nothing within a horizontal distance 

 of eight hundred feet in one instance. 



About a thousand feet below the top of the Mississippi lime the 

 wells that have been drilled deep enough have all struck granite 

 without locating any deep oil or gas sands. In contrast to many 

 neighboring areas, the Independence district appears to have in the 

 Mississippi lime a real farewell horizon. 



Apart from their bearing on the oil possibilities of the region 

 the studies in this district suggest a good many paleogeographic 

 problems and give some data for their solution. They make it 

 possible to form a fairly definite picture of the locally variable and 

 ever changing conditions in this part of the old Pennsylvanian sea. 

 They indicate, or so it is hoped, that well log studies, if carefully 

 made, may help in solving many problems of general geologic 

 interest. 



XXXVII. ROBBERTSON OIL FIELD, GARVIN COUNTY, 

 OKLAHOMA 

 Leon English 



From the Oklahoma Geological Survey. 

 Location 

 The Robberson oil field is located in the southwestern part of 

 Garvin County. Oklahoma, near the postoffice of Robberson, in T. 

 IN.. R 3W. It is ten miles northwest of the old rocks of the 

 Arbuckle uplift. The field is the only one of importance in the 

 territory which flanks the Arbuckle uplift on the north and north- 

 west, while the territory to the west, southwest, and south is produc- 

 tive in the Fox, Loco, Wheeler, Healdton, and Hewitt fields. 



Discovery Well and Subsequent Development 



The first well was drilled in June 9, 1920 in sec. 16, by the Mag- 

 nolia Petroleum Company and made 40 million cubic feet of gas. 

 Since then a score of gas wells with a total capacity of over 350 

 million cubic feet have been drilled and over a thousand barrels of 

 oil are being produced daily from twelve wells. 



The field has been extended, covering in addition to sec. 16, 

 portions of sees. 9, 10, 11, 13, 14, 15, and 17. The gas is very dry 

 and the oil is of low gravity, averaging 24° Baume'. 



