Table 6.—Marketed production of natural gas 1 
 
- Year 
Million cubic feet 
Value 
 
 
 
(thousands) 
 
1963                                                     
1,233,883 
$160,405 
 
1964                                                     
1,316,201 
166,747 
 
1965                                                     
1,320,995 
182,297 
 
1966                                                     
1967                                                     
1,351,225 
1,412,952 
189,172 
202,052 
 
 1 Comprises gas either sold or consumed by producers, including losses in
transmission, amounts added to storage, and increases in gas pipelines. 
 THE MINERAL INDUSTRY OF OKLAHOMA 651 
 
multimillion-dollar coal mine and metallurgical cpking plant operation. 
 
 Helium.—The Federal Bureau of Mines helium plant at Keyes, Cimarron
County, is the only helium producing facility in the State. In 1967, the
plant produced 309.1 million cubic feet of helium (99.995 percent purity)
a decrease of 43.3 million cubic feet from the 1966 production level. Production
was valued at $9.8 million on the basis of the Bureau of Mines established
sales price of $35 per 1,000 cubic feet (f.o.b. plant). 
 Sales (shipments) of helium from the Keyes plant totaled 273.4 million cubic
feet. The balance of production was placed in underground storage in the
Cliffside gasfield near Amarillo, Tex., as part of the helium conservation
program. Shipments from the plant are made by railroad tank cars or highway
semitrailer trucks. All shipments are of gaseous helium; the plant is not
equipped to produce liquid helium. 
 At yearend proved recoverable reserves of natural gas in Oklahoma were approximately
14.7 cubic feet of gas reserve for each cubic foot produced. The American
Gas Association reported that new discoveries found through exploratory drilling
added 277 billion cubic feet to the gas reserve; another 495 billion cubic
feet ' ~' as added through extension and revision of existing reserves. 
 Underground natural gas storage facilities in nine counties had a total
capacity of 74.2 billion cubic feet of working gas volume (above minimum
working pressure) and 123.7 billion cubic feet of cushion gas volume (below
minimum working pressure). Current maximum storage capacity is 303 billion
cubic feet. Available storage capacity permitted continuous production and
conservation of casinghead 
 Natural Gas.—Oklahoma ranked third in the Nation in natural gas production
as 66 counties, led by Texas, Beaver, Harper, Latimer, and Ellis Counties,
in descending order, reported natural gas output. Production was obtained
from over 7,400 wells, exclusive of casing head gas wells. 
 Phillips Petroleum Co.'s Wildcat No. 1— A Flaming in Washita County,
dry at a depth of 21,959 feet, was abandoned late in August. Minor gas flows
from three horizons, at depths between 15,500 and 17,000 feet in the Springer
Formation, did not warrant further testing to determine the exact producing
horizon. 
 Chevron Oil Co. announced plans to deepen tests in the Springer Formation
from 17,040 feet to 18,200 feet in its No. 1 Rush Springs Unit, Grady County.
The geological discovery opened Grady County's Southwest *Rush Springs Field.
The preceeding month the company reported completing the State's deepest
producerthe No. 2 Rush Springs Unit. 
gas from oil wells during periods of low gas demand. 
 
 Natural Gas Liquids.—Seventy-nine natural gasoline plants (Federal
Bureau of Mines helium extraction plant excluded from total) recovered almost
1.6 billion gallons of natural gas liquids in 1967. Liquefied petroleum (LP)
gases accounted for 64 percent of the volume and 58 percent of the value;
natural gasoline and cycle products comprised the remainder. 
 Service Gas Products Co. began operating its new 15-million-cubic-feet-per-day
refrigerated-absorption plant near Aline in Alfalfa County. Four plants under
construction at yearend and scheduled for completion early in 1968 included
the Pan American Petroleum Corp. 80-millioncubic-feet-per-day (MMcfd) Elmwood