Buffer oxygen removal device for combustion converter of associated gas in fire flooding oil field

Abstract

The invention relates to a buffer oxygen removal device for a fire flooding oil field associated gas combustion converter. The device can be used to remove oxygen in a hot fluid formed by combustion conversion of fire flooding oil field associated gas. The buffer oxygen removal device for the fire flooding oil field associated gas combustion converter comprises a shell body; the shell body is filled with oxygen removal filler units capable of removing oxygen in the hot fluid; and the oxygen removal filler unit can move to remove the oxygen and can removing oxidation layers by friction. Fillerin the device can be used to effectively remove excess oxygen in the hot fluid generated by combustion conversion of the fire flooding oil field associated gas, the filler can remove oxygen by movement, the oxygen removal efficiency is high, and safe reliable continuous recovery and utilization of the hot fluid generated by combustion conversion of the fire flooding oil field associated gas can berealized.

Description

technical field [0001] The invention relates to the technical field of oilfield exploitation, in particular to a buffer deaerator for a combustion converter of associated gas in a fire-flooding oilfield. Background technique [0002] Oilfield associated tail gas is a gas that cannot be directly used and is discharged along with petroleum liquid during oilfield exploitation. When using fire flooding, steam flooding or gas flooding (such as CO 2 In the process of oil extraction with enhanced oil recovery technologies such as flooding), the methane gas contained in the oil will be discharged together with the oil and gas to become the associated gas in the oilfield extraction process. The associated gas with high concentration (>30% vo1) can be directly or Indirect utilization, and the associated gas with low content (generally containing 1-10% vo1 methane) can not be directly burned and utilized, and most of it is directly vented on site to form the associated methane tail...

AI Technical Summary

Problems solved by technology

At present, due to the uneconomical recovery technology, most of them are directly emptied, resulting in a waste of resources; at the same time, the associated tail gas of steam flooding production wells mainly contains methane (CH 4 ) and carbon dioxide (CO 2 ), recovery or burning after desulfurization is generally adopted on site, methane (CH 4 ) content is unstable, and in the process of burning and utilizing, the flame is often turned off, which is likely to cause safety hazards; methane (CH 4 ) is a greenhouse gas, the greenhouse effect is 25 times greater than carbon dioxide, causing environmental pollution, the recovery and utilization of tail gas is an unavoidable part of ecological environmental protection

[0003] In this technical field, a method of burning associated gas in fire flooding oilfields and converting it into thermal fluid for recovery and utilization has been researched. Sometimes the converted thermal fluid has the problem of excessive oxygen content, which leads to the increase of production when the thermal fluid is reinjected into the reservoir. Poor effect, low security and other issues

At present, the deoxygenation technology mainly uses reducing agent as the filler of the device to remove oxygen. The filler in the device is basically fixed. The combustion of associated gas in the fire flooding oilfield is converted into thermal fluid under high temperature and high pressure conditions. The fixed filler is not conducive to deoxidation.

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