METHOD OF OIL-FIELD DEVELOPMENT WITH RECOVERY OF REFINERY WATER DRAIN AND SYSTEM FOR IMPLEMENTATION THEREOF Russian patent published in 2010 - IPC E21B43/20 E03F1/00 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to oil-refining and oil-producing industry, namely to drain recovery and flooding systems and keeping of formation pressure in oil-field development. The method involves oil production from various beds, keeping of formation pressure by injection of refinery mineralised water as a working substance in the beds. According to the invention, there is specified a group of injection wells striking the beds with the delivery chinks which have opened layers, containing local water of various physical and chemical properties and various reservoir features. Before injection of the working substance, physical and chemical properties of the working substance and local water are checked. Potential sediment formation is estimated and, as the case may be, the working substance flow is directed to the bed with minimum permissible sediment formation. In flow variation, the working substance is drained in the bed - an interlayer with high reservoir features. The device - system comprises the producing wells having struck the various beds, water conduits, pumps, a water source for injection in the bed for keeping of formation pressure, the injection wells having struck the beds containing local water with various physical and chemical properties and various reservoir features combined in a group with a general water conduit collector connected to a water drainage line for refinery discharge. According to the invention, the water conduit collector is provided with an analysis block of physical and chemical characteristics of the working substance, and the water conduits have flow switches. Said analysis block of physical and chemical characteristics of the working substance and switches are functionally interconnected through a computing and managing unit - controller for comparing physical and chemical characteristics of the working substance and local waters.

EFFECT: lower injectability loss of payout beds, and enabled recovery of refinery mineralized water drain.

2 cl, 2 tbl, 1 dwg