OPERATION METHOD FOR DEEP GAS AND GAS-CONDENSATE WELLS DRILLED IN MULTIPAY FIELD

摘要

FIELD: oil and gas industry, particularly to operate gas or gas condensate well in multipay field in difficult conditions associated with upper reservoir water inflow to well bottom through leaking production string zones.;SUBSTANCE: method involves lowering production string in well and cementing thereof; lowering production tubing provided with packer inside production string; performing packing operation; installing wellhead connections; completing well and bringing the well into operation; extracting product via production tubing. Packer is located downstream of leaking production string zone to shut-off upper reservoir water ingress in well bottom. Pressure preventing reservoir water lifting via hole annuity is created over the packer. Water inflowing from upper reservoir is accumulated over packer and provides additional backpressure on gas flowing from well bottom in vertical direction.;EFFECT: prevention of upper reservoir water inflow to well bottom.;1 dwg