Injection-production system and injection-production method

Abstract

The invention discloses an injection-production system and an injection-production method, aiming to solve the problem that a pipe column in a production well is difficult to lift during subsequent well repairing operation of the injection-production system in the prior art. In the injection-production system provided by the invention, a monitoring pipe column and a production pipe column which are independent of each other are arranged in the production well, an injection pipe column and a gas injection pipe column are arranged in the injection well, and the tail end of the production well is communicated with the bottom of the injection well, wherein the monitoring pipe column comprises a monitoring pipe and a guide cone which are connected in series in sequence; a plurality of temperature pressure monitoring devices are arranged in the monitoring pipe; the production pipe column comprises a sucker rod and an oil-gas separating device which are connected in series in sequence; the gas injection pipe column sleeves the upper part of the injection pipe column; the injection pipe column comprises a first oil pipe and a first sealing device which are connected in series in sequence, and a bell mouth is formed at the tail end of the injection pipe column; the gas injection pipe column comprises a second oil pipe and a second packer which are connected in series in sequence. Through the injection-production system and the injection-production method provided by the invention, the difficulty in lifting the pipe column in the production well can be lowered effectively.

Description

technical field [0001] The invention relates to the field of oil layer exploitation by fire, in particular to an injection-production system and an injection-production method. Background technique [0002] The combustion oil layer recovery technology uses part of the heavy components of the crude oil in the oil layer as fuel, continuously burns to generate heat, and drives the crude oil out of the oil layer. Compared with other oil recovery methods, it has many advantages such as wide application range, high oil displacement efficiency, and low cost. It can become an effective replacement technology for heavy oil recovery. Applying fire technology to horizontal wells can achieve the effect of fire flooding assisted gravity drainage. The typical characteristics of the production process of fire flooding assisted gravity drainage are high temperature (up to over 700°C), high gas-oil ratio, wide range of production fluid temperature, and the number of string operations in the...

AI Technical Summary

Problems solved by technology

[0008] The invention provides an injection-production system and an injection-production method, so that the inner pipe string of the production well can be easily pulled out in the later workover operation of the injection-production system

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