B737 Undifferentiated or Other Model
Flight Crew Flight Instructor; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 125; Flight Crew Total 11400; Flight Crew Type 125
Inflight Event / Encounter Wake Vortex Encounter
General None Reported / Taken
Procedure; Environment - Non Weather Related
We departed runway 18L from DFW. Numerous aircraft before and probably after us. Great weather; light south winds. We were climbing via the BLECO7 RNAV departure as were most of the departures off 18L. I was First Officer; Pilot Monitoring. Somewhere around 2000 ft to 3000 ft MSL we encountered what we believe was a previous aircraft's wake. The airplane rolled right; no more than 25 degrees; while the Captain was inputting strong left aileron. After a few seconds the roll switched direction and again we rolled no more than 25 degrees left though Captain was putting in significant right aileron. The whole event lasted no more than 10 seconds; rest of flight uneventful. Prior to our encounter; we heard a previous aircraft on the freq report a wake encounter as well; I don't know exactly where they were.  My guess at contributing factors light winds; and the exactness of RNAV departures.
B737 First Officer reported encountering wake turbulence departing DFW.