METHOD OF OIL FILED DEVELOPMENT Russian patent published in 2011 - IPC E21B43/24 

FIELD: oil and gas production.

SUBSTANCE: method involves staged borehole drilling with two horizontal upper and lower holes stacked within the same formations and filters placed therein. The horizontal holes are used as either heat carrier injectors, or producers for formation selection. The borehole for the horizontal holes is inclined. The filters comprises a number of portions connected by unperforated nipples. Before heat carrier injection, a straight-way removable packer is chuted separately in each horizontal hole and arranged in filter tubes. The heat carrier is injected simultaneously in both holes. On completion of formation heating, the lower packer is removed, and a pump is run, and the heat-carrier is injected by the upper packer only, and production is selected from the lower hole by the pump which supports a hydrostatic pressure level below a mouth level of the upper horizontal hole. For uniform formation heating, the heat-carrier is injected stepwise through the filters associated with colder compartments.

EFFECT: more efficient oil field development ensured by reduced capital inputs, operating expenses, heat loss and higher debit.

2 cl, 5 dwg