METHOD FOR COMMUNICATION OF DUAL HORIZONTAL WELLS

摘要

The invention discloses a method for communication of dual horizontal wells,and relates to the oil and gas development field. The method comprises saidsteps of:testing steam-injection horizontal wells and production horizontal wells;injectingsolvents into the steam-injection horizontal wells and the productionhorizontal wellsrespectively; injecting water into the steam-injection horizontal wells viawellbores ofthe steam-injection horizontal wells, injecting water into the productionhorizontalwells via wellbores of the production horizontal wells; continuously injectingwaterinto the steam-injection wells and the production horizontal wellsrespectively, andimproving water-injection pressure of the steam-injection horizontal wells,water-injection pressure of the production horizontal wells; after closing thesteam-injection horizontal wells and the production horizontal wells meets afirstpreset condition, injecting gas into the steam-injection horizontal wells andtheproduction horizontal wells respectively, so that underground water flows backtoground; and after the underground water flows back to the ground, injectingisobaricsteam into the steam-injection horizontal wells and the production horizontalwellsmeets a second preset condition. The present application can effectivelyenhance adegree of uniformity of communication between dual horizontal wells, shortencommunication time between the dual horizontal wells, and significantly reduceconsumption of solvents.