A method which combines fluid drive and gravity drainage to produce hydrocarbons from a subterranean formation comprises injecting a fluid through at least two upper horizontal wells out into the formation for moving hydrocarbons from the formation into at least one lower horizontal well through which...http://www.google.es/patents/US5273111?utm_source=gb-gplus-sharePatente US5273111 - Laterally and vertically staggered horizontal well hydrocarbon recovery method
Laterally and vertically staggered horizontal well hydrocarbon recovery method
