Steam generating and injecting system capable of cooperatively utilizing electricity and heat

Abstract

The invention discloses a steam generating and injecting system capable of cooperatively utilizing electricity and heat. The steam generating and injecting system comprises a first water pump device, a second water pump device, an electric boiler, an economizer, a liquid mixer, a steam pocket steam injection furnace, a steam mixer and a superheater. The electric boiler is used for receiving and heating water output by the first water pump device and outputting hot water and steam; the economizer is used for receiving and preheating water output by the second water pump device and outputting preheated water; the hot water output by the electric boiler and the preheated water output by the economizer enter the liquid mixer; the steam pocket steam injection furnace comprises a steam pocket and a steam injection furnace; the steam pocket is used for receiving water output by the liquid mixer; the steam injection furnace is used for receiving water output by the steam pocket, generating steam and conveying the steam to the steam pocket; steam output by the electric boiler and steam output by the steam pocket enter the steam mixer; and the superheater heats steam output by the steam mixer into required high-temperature and high-pressure steam to be conveyed to an oil well. According to the system, energy saving, consumption reduction and emission reduction can be realized to the greatest extent, and meanwhile, the cost is reduced.

Description

technical field [0001] The invention relates to the technical fields of oil field mining surface engineering and energy comprehensive utilization, in particular to a steam generation and steam injection system utilizing electricity and heat synergistically. Background technique [0002] Against the backdrop of steady growth in oil demand and a gradual decrease in the world's recoverable reserves of conventional crude oil, my country's dependence on foreign oil continues to rise rapidly, rising to 70.8% / 73.5% in 2019 / 2020, making the country's energy security situation grim . In order to maintain the stable development of the national economy, heavy oil, which accounts for 70% of the world's remaining oil reserves, has gradually become one of the important strategic resources that can replace light crude oil. my country currently has proven and controlled heavy oil reserves of 1.6 billion tons, and its output accounts for 1 / 10 of my country's total oil output, involving more ...

AI Technical Summary

Problems solved by technology

[0005] The existing solar photothermal conversion heavy oil steam injection technology mainly has the following disadvantages and shortcomings: 1) The thermal efficiency of solar photothermal conversion is unbalanced: the scheme of using solar collectors to directly heat liquid water to evaporate it is affected by day and night, seasons, geography, etc. Due to the limitations of natural conditions such as latitude and altitude, as well as the influence of random weather factors such as sunny, cloudy, cloudy, and rainy, the solar irradiance reaching a certain ground is intermittent and extremely unstable. The large-scale application of direct production of steam increases the difficulty

2) High investment and maintenance costs: Solar thermal equipment needs to occupy a large amount of land and lay complex pipelines. In actual oil fields, a large number of oil production pipelines have been laid, and it is impossible to lay light fields and thermal pipelines at low cost

However, adding an energy storage device to the steam injection system for heavy oil thermal recovery will greatly increase the investment and maintenance costs. In addition, the solar heliostat system is expensive and occupies a large proportion of the investment. Based on the above reasons, the current solar photovoltaic The application of thermal conversion heavy oil thermal recovery technology is not yet economical

3) Lack of industrial projects in actual operation: Based on the two main reasons of thermal efficiency imbalance and insufficient economy, the application of solar photothermal conversion heavy oil thermal recovery technology has no actual industrial projects in operation in China, and is still in the research and design stage

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