PN 1227 - Towering against a background of bright blue Texas sky are processing towers at Shell Oil Company's new Sheridan, Tex., cycling plant where gas from the nearby Sheridan field is processed to extract from it useful hydrocarbons such as propane for "bottled gas"; butane is used in the manufacture of aviation gasoline; natural gasoline, and fuel oil. The residue gas which formerly would have been burned in flares, is compressed and injected under pressure back into producing formations to save it until a market for it exists, and to help repressure the field. This plant, Shell's first venture into the cycling field, is typical of modern oil comapnies' practices in conserving produts once wasted or not exploited at all.
