OIL DEPOSIT DEVELOPMENT METHOD Russian patent published in 2007 - IPC E21B43/20 

FIELD: enhanced recovery methods for obtaining hydrocarbons, particularly from watered oil beds.

SUBSTANCE: method involves performing cyclic flooding of deposit beds through injection wells and producing oil through producing wells. To implement above method non-exhausted oil deposit zones located between injection wells are brought into development within seven-spot well pattern. Oil deposit is separated into triangular areas so that injection wells 1, 2, 3 are arranged at triangle apexes. Deposit bed flooding is carried out simultaneously through injection wells 1, 2 for 1/3 of flooding cycle duration, then through injection wells 2, 3 for next 1/3 of flooding cycle time and through injection wells 3, 1 for the last 1/3 of flooding cycle duration. Then flooding cycle is repeated in selected direction.

EFFECT: increased reservoir recovery.

1 dwg