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Denitrification method and denitrification system for associated gas in oil field

A technology for denitrification of oilfield associated gas, applied in the field of denitrification method and denitrification system of oilfield associated gas, can solve the problems of complex equipment, limited adsorption capacity, high cost, etc., and achieve the effect of simple process and low application cost

Pending Publication Date: 2019-08-06
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

At present, the most widely used natural gas denitrification processes in the world are cryogenic denitrification process and pressure swing adsorption denitrification process. Low and limited adsorption capacity

Method used

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  • Denitrification method and denitrification system for associated gas in oil field
  • Denitrification method and denitrification system for associated gas in oil field

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Embodiment Construction

[0024] Embodiments of the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and therefore are only examples, rather than limiting the protection scope of the present invention.

[0025] figure 1 It is a flow chart of the denitrification method used for oilfield associated gas in the embodiment of the present invention, such as figure 1 As shown, the denitrification method for oilfield associated gas includes the following steps:

[0026] Step 1, cooling the associated gas in the oilfield, so that the temperature of the associated gas in the oilfield is reduced to a preset temperature;

[0027] Step 2, contacting the cooled oilfield associated gas with a light hydrocarbon solvent, so that the methane in the oilfield associated gas is dissolved in the light hydrocarbon solvent, and the nitr...

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Abstract

The invention relates to a denitrification method and a denitrification system for associated gas in an oil field. The method includes 1) cooling the associated gas to lower the temperature of the associated gas to a preset temperature; 2) bringing the cooled associated gas into contact with a light hydrocarbon solvent so that methane in the associated gas is dissolved into the solvent and discharging nitrogen-containing gas not dissolved into the solvent; 3) subjecting the solvent into which the methane is dissolved to flashing treatment to separate the methane from the solvent. The method and the system make a denitrification process simpler, and can efficiently remove nitrogen in the associated gas in an oil field.

Description

technical field [0001] The invention belongs to the field of production and treatment of petroleum products, and in particular relates to a denitrification method and a denitrification system for oil field associated gas. Background technique [0002] During the extraction of natural gas, many oil fields use nitrogen as a gas injection source, which leads to a high content of nitrogen in the associated gas of the oil field. Natural gas with high nitrogen content has a certain negative impact on sales and use, especially when the concentration of nitrogen in natural gas exceeds 30%, the natural gas will not be ignitable. At present, nitrogen flooding technology is widely used in the process of oil exploration and development in my country. The nitrogen content in the produced oilfield associated gas is between 4% and 40%. A large amount of high nitrogen content natural gas needs to be processed before being exported. Therefore, denitrification treatment is the key to the tre...

Claims

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Application Information

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IPC IPC(8): C10L3/10
CPCC10L3/105
Inventor 王世洁赵毅姚丽蓉赵德银胡文革李冬梅徐梦瑶周勇郭靖钟荣强梁根生应海玲鄢宇杰王建海冯一波
Owner CHINA PETROLEUM & CHEM CORP
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