METHOD FOR DEVELOPMENT OF OIL DEPOSIT Russian patent published in 1996 - IPC

FIELD: oil production. SUBSTANCE: oil deposit is exposed by pattern of producing and injection wells. When triangular uniform well pattern is employed, enlarged ten-slot area members are formed. Mine wells are located uniformly over the perimeter, and one in the center of triangle. Injection wells are located in the triangle corners. The remaining seven wells are equipped as producing. Heat carrier is injected and production is withdrawn by cycles in three stages. At the first stage, heat carrier is injected into injection wells and in three, every other, of the six producing wells. At the second stage, heat carrier is also injected, and in producing wells injection is replaced by withdrawal of product and vice versa. At the third stage, heat carrier is injected through injection wells, and product is withdrawn through the central producing well. The other producing wells are stopped. Cycles of heating stimulation are repeated until full completion of formation stimulation. Then, injected into injection wells is nonheated water and withdrawal is accomplished from all producing wells. EFFECT: higher efficiency. 4 dwg, 2 tbl