Windable electric ignition and monitoring system for in-situ combustion

Abstract

The invention discloses a windable electric ignition and monitoring system for in-situ combustion, which comprises a gas injection tubular column (16) arranged at the lower part of a wellhead (7), and a coiled tubing (25) capable of being inserted into the gas injection tubular column (16) along an axis of the gas injection tubular column (16) downwards, wherein the coiled tubing (25) is internally provided with an electric igniter (21) and an igniter temperature measurement device (22) for monitoring the electric igniter (21); the electric igniter (21) and the igniter temperature measurement device (22) are connected with a signal acquisition control cabinet (12) outside the wellhead (7) by a power and temperature measurement cable (24) arranged in the coiled tubing (25); the electric igniter (21) comprises a cylindrical sheath (27); and the sheath (27) is internally provided with electric heating wires (28) and insulation packing (30). Since the electric ignition device is arranged in the coiled tubing, the electric ignition device can be wound and unwound quickly by winding and unwinding the coiled tubing, and the operating efficiency is improved greatly.

Description

technical field [0001] The invention relates to the field of heavy oil exploitation equipment, in particular to a retractable electric ignition and monitoring system for burning oil layers. Background technique [0002] Liaohe Oilfield is the largest heavy oil production base in my country, and the heavy oil production accounts for about 60% of the total production. At present, most of the blocks are in the late stage of steam injection development, and the development difficulty is increasing. It is an alternative development method to use fire flooding technology Effective means, the key to the successful development of fire flooding technology is oil reservoir ignition. [0003] At present, the commonly used ignition methods at home and abroad are mainly divided into two categories: chemical injection ignition and electric ignition. Among them, the electric ignition technology mainly uses the electric heater at the bottom of the well to heat the medium injected into the g...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem in the prior art that the lifting operation of the igniter in the wellhead is inconvenient and the operation efficiency is low, the present invention provides a retractable electric ignition and monitoring system for burning oil layers. In the pipe, the rapid retraction and retraction of the electric ignition device is realized by retracting and retracting the coiled tubing, which greatly improves the working efficiency

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