Interwell agitation type gas lift induced flow device and gas lift induced flow method

Abstract

The invention discloses an interwell agitation type gas lift induced flow device and gas lift induced flow method. Small-period high-frequency open flow-well shut-in is achieved, elevation mixed liquid is gradually formed, the liquid column pressure drop in a shaft is reduced, the production pressure difference is increased, stratum oil gas is started to enter the shaft, and oil well self-flow is recovered; the method comprises the following steps that 1, a production wing valve and an oil nozzle of a fault well are closed, a production main valve and a wing valve of the fault well are opened, and high-pressure gas of an adjacent well enters an oil pipe of the fault well; 2, the well is soaked; 3, the wing valve of an adjacent well is closed, the wing valve and the oil nozzle of the fault well are opened, and gas and liquid in a shaft of the fault well are enabled to move upwards; 4, the oil nozzle of the fault well is closed, the migration of the gas at the upper part is stopped, and the upward migration speed of the far-end gas is slowed; the liquid at the lower part moves upwards and intrudes into the gas at the upper part to form a gas-liquid mixed flow state; 5, the process to enlarge the gas-liquid mixed flow-state liquid column is repeated, and the gas-liquid mixed flow-state liquid column is transported to the ground; and 6, formation oil gas is started to enter a shaft for induced injection and self-injection recovery. According to the interwell agitation type gas lift induced flow device and gas lift induced flow method, the operation cost is low; and the method is suitable for similar wells.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploitation, and in particular relates to an interwell oscillating gas lift induced blowout device and a gas lift induced blowout method. Background technique [0002] At present, in the production process of gushing wells in offshore oilfields, the energy of the formation is used to continuously lift the formation fluid to the ground to realize gushing production. However, during the production process of the self-flowing well, the problem of stopping the flow of the self-flowing well may be encountered due to insufficient formation productivity or bottom-hole fluid accumulation after the test operation is shut down. [0003] Existing common methods to solve the problem of fluid accumulation and stop flow in self-flowing wells: one is to inject oil pipes with high-pressure gas sources from adjacent wells to reduce the density of oil pipes, thereby reducing process back pressure for conventio...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an inter-well oscillating gas-lift induced blowout device and a gas-lift induced blowout method to solve the technical problem of on-site self-flowing wells accumulating liquid and stopping blowout

Images