ENHANCED OIL RECOVERY METHOD USING DOWNHOLE GAS

摘要

The invention relates to the recovery of liquid or gaseous fluid media from wells, more specifically to methods for recovering residual nonrecoverable oil from depleted formations by a secondary pressure and the gasification thereof. The inventive method consists in naturally transferring compressed gas from lower gas-bearing beds to upper depleted oil-bearing stratums and creating a determined relation between gas and petroleum hydrocarbons. Said relation allows the residual non-recoverable oil in the stratum to be dissolved and afterwards recovered in the operational mode of the natural depletion of oil-and-gas condensate pools.