IMPROVED HYDROCARBON RECOVERY PROCESS EXPLOITING MULTIPLE INDUCED FRACTURES

摘要

Methods for enhancing production from underground "tight" formations. A first method comprises creating a horizontal injection wellbore and a parallel collection wellbore and upwardly-extending fissures therefrom. The injection wellbore is supplied with pressurized fluid which flows into injection fissures and drives reservoir fluids within the formation to the remaining (alternately) spaced adjacent collection fissures thereby allowing reservoir fluids to flow downwardly for collection in the production wellbore. A second method comprises drilling only a single wellbore and moving a tubing having a packer at a distal end thereof to allow injection of fluid into fissures on one side of the packer and collection of fluids via fissures on the other side of the packer. Third and fourth methods employ only a single wellbore and alternatingly spaced injection and collection fractures. Dual or multi-channel tubing is used to allow both injection of fluids and collection of fluids using a single wellbore.