METHOD OF INITIATING INFLOW FROM BED Russian patent published in 2012 - IPC E21B43/25 E21B43/18 

FIELD: oil and gas production.

SUBSTANCE: proposed method consists in creating pressure sink in bottomhole formation zone in drilled and cased wells with flow string by decreasing well fluid level by displacing fluid by system of air and water phases to be forced through head wall. Said head wall is arranged at wellhead and made up of T-bend, ejector or aerator. Flow string is arranged in well so that its bottom end is located 1.5-2 m under perforation interval. Then, well is completely filled with process fluid. Inflow from bed is initiated on feeding water phase of 4.5-7 l/s and water phase of 120-130 l/s. System of said phases is injected into flow string annulus. After foam circulation indications, water phase feed is decreased to 1-1.5 l/s, maintaining gas-fluid circulation to keep well pressure sink for at least 3 h. In injecting gas-fluid mix, water phase feed is increased by 10-15% to improve gas inflow by ejector.

EFFECT: simplified mounting, higher efficiency.

1 dwg