Ultra-viscous crude oil injection-production integrated technique tubular pile

Abstract

The invention discloses an ultra-viscous crude oil injection-production integrated technique tubular pile. The ultra-viscous crude oil injection-production integrated technique tubular pile is characterized by comprising an oil tube tubular pile which is arranged inside a vertical well section and a vacuum heat insulating tube tubular pile which is arranged inside a horizontal well section; in the oil tube tubular pile, a nitrogen gas heat insulating layer is arranged between the outer wall of an oil tube and the inner wall of an oil well casing; the oil tube tubular pile is connected with the vacuum heat insulating tube tubular pile in a plugging-type sealing way of a repeatedly-straightening intubation tube, and a plugging-type closed vapor injection and oil production integrated tubular pile is formed through a viscous crude oil thermal production well vapor injection packer, the repeatedly-straightening intubation tube, an underground viscous crude oil aligning device and an underground high-temperature-resistant compensation device. The surface of the ultra-viscous crude oil injection-production integrated technique tubular pile which is contacted with the inner wall of the oil well casing is a spherical surface. According to the ultra-viscous crude oil injection-production integrated technique tubular pile, the integral manufacturing cost of the tubular pile is reduced, and the oil production cost is further reduced; and in addition, after the vapor injection is completed, a vapor injection tubular pile is free from being lifted out of a well shaft, and an ultra-viscous crude oil rod-type injection-production device can be used for implementing the oil production, so that not only is the labor intensity of workers alleviated, but also the cold harm to the stratum can be avoided.

Description

technical field [0001] The invention relates to a production technology device of a horizontal well for thermal recovery of heavy oil, in particular to a super heavy oil injection-production integrated process string. Background technique [0002] Facing the crisis of decreasing non-renewable energy sources, people pay more and more attention to the exploitation of deep underground heavy oil. Heavy oil is characterized by high density, high viscosity, and high flow resistance. Heavy oil can flow in the oil layer. When it flows into the wellbore and then flows upwards, the viscosity of the crude oil continues to rise due to the continuous decrease of the ground temperature, and the flow resistance also increases accordingly. Even if artificial lift is used, it cannot be recovered from the ground. [0003] At present, the commonly used heavy oil production method is steam injection thermal recovery, that is, a certain amount of steam is injected into the heavy oil layer to re...

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Problems solved by technology

[0004] The disadvantages of the existing steam injection and oil production isolation process strings are: 1. The steam injection pipelines all use high-vacuum heat-insulated pipes. Due to the high cost of high-vacuum heat-insulated pipes, the high cost of oil production is caused; 2. After the gas injection is completed, the gas injection string must be lifted out of the wellbore first, and then the oil production operation will be carried out. In this way, not only the labor intensity of the workers is high, but also cold damage will be caused to the formation

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