METHOD FOR HIGHLY-VISCOUS OIL PRODUCTION FROM HORIZONTAL WELL UNDER RESERVOIR TREATMENT WITH HEAT Russian patent published in 2007 - IPC E21B43/24 

FIELD: oil production, particularly to produce heavy oil from reservoirs with the use of heat.

SUBSTANCE: method involves drilling continuous well extending to day surface; installing casing pipe in the well and cementing hole clearance; perforating casing pipe in several intervals and installing tubing string provided with packers at tubing string ends in the casing pipe; arranging packers in front of perforation intervals and performing packer setting in well; supplying heat carrier in flow string from the first well end; producing well product from inlet well end via flow string to provide necessary intake capacity; serially installing packers within perforation intervals from extreme perforation intervals to central one in non-perforated zones; setting packer in well. Heat carrier is fed in reservoir from inlet and outlet well ends via flow strings downstream of the packers. Product is extracted via tube space upstream of the packers up to bottomhole formation zone drainage initiation. Then the well is used as injection or production well.

EFFECT: increased efficiency due to serial interval treatment with heat, extended coverage of heat application and provision of oil displacement from bottomhole formation zone.

2 dwg