Injection production process of fluids produced by supercritical water oxidation

A supercritical water oxidation and fluid technology, applied in the field of energy and environment, can solve problems such as chamber wall damage, boundary layer protection interruption, cooling system failure, etc., achieve broad application prospects, increase oil recovery, and reduce the viscosity of heavy oil

Inactive Publication Date: 2012-01-18
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All cooling measures are to form an insulating layer on the chamber wall, but combustion instability or cooling system failure often leads to the interruption of the protection of the boundary layer, which subsequently leads to the destruction of the chamber wall

Method used

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  • Injection production process of fluids produced by supercritical water oxidation
  • Injection production process of fluids produced by supercritical water oxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The crude oil in the fuel tank (7) is boosted to 23MPa by the fuel pump (6), injected into the evaporative wall reactor (1) from the fuel inlet (5) of the evaporative wall reactor, and the air is boosted to 23MPa by the air compressor (2) After preheating to 400℃ by air heater (3), it is injected into the evaporative wall reactor (1) from the air inlet (4) of the evaporative wall reactor, and the evaporated water in the evaporative water tank (8) is passed through the evaporative water pump (9) The pressure is increased to 23MPa and divided into three branches, two of which are injected from the side of the evaporation wall reactor (1). The first branch is preheated to 500°C by the evaporative water heater (10), as the upper branch evaporating water is injected into the evaporation wall reaction (1) from the upper branch evaporating water inlet (11); the second branch is used as the lower The branch evaporating water is injected into the evaporating wall reactor (1) from...

Embodiment 2

[0023] The difference between this embodiment and the first embodiment is that the crude oil is replaced with high-concentration oil production wastewater. While generating multiple thermal fluids, it can also realize the harmless treatment of oil production wastewater, which has a good environmental effect. The rest of the process and implementation Example 1 is the same.

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Abstract

The invention relates to an injection production process of fluids produced by supercritical water oxidation fluids. The fuel is injected from the top of an evaporation wall reactor after being boosted to 22.1-30 MPa; the air is injected from the top of the reactor after being boosted to the same pressure and pre-heated to reach 300-500 DEG C. Evaporable water is injected from the side surface of the evaporation wall reactor in two branches after being boosted to the same pressure as the fuel; the initial temperature of the evaporable water in the upper branch after being pre-heated is 400-600 DEG C; the evaporable water in the lower branch is at normal temperature. After the supercritical water oxidation in the reactor starts, the evaporable water in the upper branch declines to 250-370 DEG C. The fluid in the reactor flows out from the outlet of the reactor and then is injected to the oil well through an injection pipe after being regulated to 5-30 MPa by a pressure regulating valve; and the evaporable water with the same pressure is injected to the annular space between the injection pipe and a shaft. According to the injection production process, the multiple hot fluids produced when the fuel is processed by the supercritical water oxidation are injected to the oil well, so that the viscosity of the thickened oil is reduced, the oil productivity is increased and the application prospect is wide.

Description

1. Technical Field [0001] The invention belongs to the field of energy and environment, and particularly relates to a supercritical water oxidation fluid injection and production process. 2. Background technology [0002] Reducing costs and maximizing the extraction of heavy oil and ultra-heavy oil are common issues facing the world's petroleum industry today. Because of its high viscosity, heavy oil brings great difficulties to exploitation, gathering, transportation and processing. Steam injection thermal oil recovery is an effective means to develop heavy oil reservoirs. The law of steam injection huff and puff is that the oil production reaches its peak in the 4th and 5th cycles, and then with the increase of the huff and puff cycle, the cycle oil production gradually decreases, the comprehensive water content increases, and the production effect is getting worse. The main reason for the poor production effect after multiple rounds of steam injection thermal recovery is the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/24
Inventor 马春元张凤鸣陈桂芳徐纯燕陈守燕
Owner SHANDONG UNIV
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