New Field Discovery. The Rumback B #21-1 (1190’ FNL; 2065’ FEL Sec. 21-T11S-R32W, Logan County, KS) has been completed as a productive oil well and placed into production. The well was drilled to a 4710’ RTD and 5 ½” production casing was set and cemented at a depth of 4704’. The wildcat well is the discovery well of the newly designated “Rumback Field”. The well is producing from undisclosed perforations.