Fire flood eclectic ignition method

Abstract

The invention relates to a fire flood eclectic ignition method. An ignition device adopted by the fire flood eclectic ignition method comprises a steam injection pipe column and an ignition system, wherein the steam injection pipe column comprises a flare opening, a check valve, a bracket, an oil pipe and a wellhead device from top to bottom; the electric ignition system comprises a ground part and an underground part, wherein the ground part comprises an intermediate frequency power supply control cabinet, a loop cable, a cable conductor and a cable sealer, and the underground part comprises a conductor, an igniter, an insulated centralizer, a screen pipe, the cable conductor, an insulated isolation wire connector and the cable conductor from bottom to top. The fire flood eclectic ignition method is easy to operate, the ignition device has high maneuverability, repeatable use, controllable temperature and uniform heating temperature, and fire flood eclectic ignition can obtain good effect by utilizing the ignition device.

Description

Technical field: [0001] The invention relates to a technical method of electric ignition for fire-driven oil recovery used for thermal exploitation of heavy oil, which belongs to the category of heavy oil recovery technology. Background technique: [0002] In the process of thermal recovery of heavy oil, due to the high viscosity of heavy oil, the steam stimulation method is generally used first, and the main methods used later are steam flooding and fire flooding. Compared with steam flooding, fire flooding also has its own advantages. Steam flooding is characterized by fast response, but high investment cost and short life. A large amount of injected steam can drive immovable oil, but requires high equipment investment, high operating cost and complex equipment. The oil recovery by fire flooding is characterized by slow initial response, low cost, and long life, because it relies on the fuel in the oil layer to provide heat, and has obvious technical characteristics. Base...

AI Technical Summary

Problems solved by technology

In the prior art, the electric heater method ignition process string [ZL 00267279.0] describes that the electric heater is sent into the oil well by the oil pipe transmission method, and then the cable wire is connected to the electric heater to heat the injected air. The column and the tubing are run downhole together. Once the electric heater is damaged, the well can only be reworked, and it is difficult to connect the cables and conductors.

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