Pilot test for gas production of fractured-vuggy condensate gas reservoir by water injection in Tahe oil field

The X25 well block in the Tahe oil field is a condensate gas reservoir with fractured-vuggy carbonates in Ordovician. Its substrate does not reserve oil and gas, and the main reservoirs are cracks, holes and caves. This area is mainly single well units, lacking of natural water energy. Production performance shows significant volume characteristics. With the decline of formation energy, gas wells stop producing by pumping due to deep liquid level. Facing such dilemma, we innovated a pilot test with water injection. Water was injected into gas well to supply energy and compress gas volume, hence made production continued. The success of this experiment explored a new EOR way in such gas reservoirs.