HAWORTH.| Commercial Conditions of Oil and Gas. 227 
In Oklahoma gas was found in many new wells along the 
ridge east of Bartlesville and north practically to the state line. 
A few large wells, in what appears to be the same field, were 
developed across the line in Kansas. South, along the Hog- 
shooter, good gas-wells are also found. Here the gas lies un- 
derneath the oil, and frequently when a well drilled for oil goes 
dry it is carried deeper and a good gas-well obtained. The 
same is true regarding the region east of Collinsville, where 
wells having a capacity of from five to twelve million cubic 
feet per day are obtained. Also a number of good gas-wells. 
have been obtained in the vicinity of Tulsa and west of Red 
Fork, in the district surrounding the Glenn oil-pool, and also 
near. Muskogee. The boundaries of this last field have ap- 
proached closer to Muskogee than was the case a year ago. 
While no distinctly new field was opened up in Oklahoma 
during 1907, still gas was found in so many different places 
that the total possible production for the year was greatly in- 
creased. 
Geology of the Field.—The oil and gas produced in the Mid- 
continental field, except that from the gas-wells in the Elm- 
dale-Arkansas City district, and the Muskogee oil-field on the 
southeast, come mainly from Lower Carboniferous strata. In 
Oklahoma the westward development seems to result in deeper 
wells, so that the productive horizon remains about the same. 
In Kansas, however, there is a slight modification of this, and 
many of the oil-wells and gas-wells in the west part, near 
Longton and Howard, are not deeper than wells in the eastern 
part. This means that the productive horizon there is higher 
up geologically than in the heart of the field. Gas in the Elm- 
dale-Arkansas City district is obtained fully 1000 feet higher 
geologically than the gas about Iola, Chanute and Indepen- 
dence. The mouths of these wells are in the Permian, but the 
productive sandstones are in the uppermost part of the Carbon- 
iferous. Some oil has been obtained at Muskogee from sand- 
stones evidently below the Mississippian. Few attempts have 
been made elsewhere to penetrate the formations below the 
Mississippian except in the vicinity of Chelsea, Miami, and a 
few other points outside of the productive fields to the east. 
All of these wells, except those in the immediate vicinity of 
Muskogee, have been barren of oil and gas. 
