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SAGD (steam assisted gravity drainage) wet steam injection station system, boiler water recycling method thereof

A technology of wet steam and steam injection, which is applied in the field of SAGD wet steam injection station system, can solve the problems of inability to realize energy saving, water saving and low thermal efficiency, so as to improve the utilization of heat and overcome the effect of low thermal efficiency

Active Publication Date: 2012-10-10
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the embodiment of the present invention is to provide a SAGD wet steam steam injection station system and its boiler water recovery and utilization method to solve the problems of low thermal efficiency and unrealizable recovery of heavy oil in the steam injection station system in the prior art Energy saving and water saving issues

Method used

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  • SAGD (steam assisted gravity drainage) wet steam injection station system, boiler water recycling method thereof
  • SAGD (steam assisted gravity drainage) wet steam injection station system, boiler water recycling method thereof
  • SAGD (steam assisted gravity drainage) wet steam injection station system, boiler water recycling method thereof

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Embodiment 1

[0018] Embodiments of the present invention provide a SAGD wet steam injection station system, such as figure 1 As shown, the system includes: a steam generator 1, a separator 2, a flash evaporator 3, a water maker 4, a drum boiler 5, and a heat exchanger 6, wherein the steam generator 1, the separator 2, the flash evaporator 3, The water generator 4 and the drum boiler 5 are connected sequentially, and the heat exchanger 6 is respectively connected to the steam generator 1 and the water generator 4. The working principle of the SAGD wet steam injection station system will be described in detail below.

[0019] The separator separates the high-dryness steam and high-temperature brine output from the boiler. The flash evaporator is used to flash the high-temperature brine separated by the separator to generate wet steam and high-concentration brine. The water generator is used to convert the wet steam generated by the flash evaporator to The product water generated by evaporati...

Embodiment 2

[0031] The embodiment of the present invention also provides a boiler water recycling method based on the SAGD wet steam injection station system, Figure 4 is the flowchart of the method, such as Figure 4 As shown, the method includes:

[0032] Step 401, separating the high-quality steam and high-temperature brine output by the boiler;

[0033] Step 402, flashing the separated high-temperature brine to generate wet steam and high-concentration brine;

[0034] Step 403, performing evaporative desalination treatment on the high-concentration brine produced by the flash treatment with the wet steam produced by the flash treatment to produce finished water;

[0035] Step 404, heating the generated product water into superheated steam;

[0036]Step 405, recovering the waste heat of the flue gas generated by the SAGD wet steam injection station system as a supplementary heat source for evaporative desalination treatment.

[0037] By reprocessing the high-temperature brine outp...

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Abstract

The invention provides an SAGD (steam assisted gravity drainage) wet steam injection station system, and a boiler water recycling method thereof. The system comprises a steam generator and a separator, wherein the separator is used for separating high-dryness steam and high-temperature saline water output by a boiler; the system also comprises a flash evaporator, a water maker, a drum boiler and a heat exchanger; the flash evaporator is connected with the separator for carrying out flash evaporation treatment on the high-temperature saline water separated by the separator so as to generate wet steam and high-concentration saline water; the water maker is connected with the flash evaporator for carrying out evaporative desalination treatment on the high-concentration saline water generated by the flash evaporator so as to generate product water by the wet steam generated by the flash evaporator; the drum boiler is connected with the water maker for heating the product water generated by the water maker to form overheat steam, and the heat exchanger is respectively connected with the water maker and the steam generator for recovering smoke afterheat generated by the steam generator as a supplied heat source of the water maker for carrying out evaporative desalination treatment. According to the wet steam injection station system, energy and water can be saved and the utilization of heat can be improved.

Description

technical field [0001] The invention relates to the technical field of oil field recovery technology, in particular to a SAGD wet steam injection station system and a boiler water recycling method thereof. Background technique [0002] At present, for the exploitation of heavy oil, especially extra-heavy oil and super-heavy oil fields, the main production methods include: steam huff and puff, steam flooding and SAGD (steam assisted gravity drainage). Among them, the ultimate recovery rate of steam stimulation is only about 25%, and the recovery rate of steam flooding is relatively high at about 60%. These two recovery methods are earlier heavy oil recovery technologies and are also limited by some conditions. SAGD is the latest and relatively mature technology for mining heavy oil, and it has been rapidly industrialized in North America. For the state where more than half of the world's remaining reserves are heavy oil, SAGD technology has a large room for development. [0...

Claims

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Application Information

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IPC IPC(8): E21B43/24C02F9/10
Inventor 杨立强杨建平郑南方丁亚军孙建平
Owner PETROCHINA CO LTD
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