Energy increase type foam drainage gas recovery process

A foam drainage and gas recovery technology, applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of prolonging the half-life, not mentioning gas generation, energy-increasing performance, etc., and achieve the effect of improving the degree of recovery

Inactive Publication Date: 2015-12-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patent only improves the foaming ability of the agent and prolongs the half-life, but does not mention the performance of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] An energy-enhancing foam drainage gas recovery process (this process is suitable for wells with extremely low production and multi-layer combined production wells), firstly weigh the same weight of sodium nitrite and ammonium chloride, sodium nitrite and ammonium chloride are collectively referred to as A The sodium nitrite in it is called A1, and the ammonium chloride is called A2. Sodium nitrite and ammonium chloride are respectively injected into the liquid accumulation in the gas well by injection pump, and then injected into the gas well after a period of time. The catalyst and foaming agent are injected into the effusion, and the catalyst and foaming agent are called B agent. The gas generated automatically by the reaction of two kinds of agents A and B is used to disturb the fluid in the wellbore and generate a large amount of foam. The foam is carried from the bottom of the well to the surface with the air flow to solve the problem of liquid drainage in low-press...

Embodiment 2

[0021] An energy-enhancing foam drainage gas recovery process (this process is suitable for extremely low production wells and multi-layer combined production wells), first weigh the same weight of sodium nitrite and ammonium chloride, that is, the weight of sodium nitrite and ammonium chloride The ratio is 1:1, sodium nitrite and ammonium chloride are collectively referred to as agent A, the sodium nitrite in it is called A1, and the ammonium chloride is called A2, and the sodium nitrite and ammonium chloride are injected separately using the injection pump. In the liquid accumulation in the gas well, after a period of time, the catalyst and foaming agent are injected into the liquid accumulation in the gas well, and the catalyst and foaming agent are called B agents. The weight of agent A is 3 times that of agent B, and the input weight of agent A is 10% of the weight of fluid in the gas well. The gas generated automatically by the reaction of two agents, A and B, disturbs th...

Embodiment 3

[0023] An energy-enhancing foam drainage gas recovery process (this process is suitable for extremely low production wells and multi-layer combined production wells), first weigh the same weight of sodium nitrite and ammonium chloride, that is, the weight of sodium nitrite and ammonium chloride The ratio is 1:1, sodium nitrite and ammonium chloride are collectively referred to as agent A, the sodium nitrite in it is called A1, and the ammonium chloride is called A2, and the sodium nitrite and ammonium chloride are injected separately using the injection pump. In the liquid accumulation in the gas well, after a period of time, the catalyst and foaming agent are injected into the liquid accumulation in the gas well, and the catalyst and foaming agent are called B agents. The weight of agent A is 3 times that of agent B, and the input weight of agent A is 30% of the weight of fluid in the gas well. The gas generated automatically by the reaction of two agents, A and B, disturbs th...

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PUM

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Abstract

The invention discloses an energy increase type foam drainage gas recovery process. Firstly, a reagent A is fed into accumulated liquid in a gas well, then a reagent B is fed into the accumulated liquid in the gas well, wherein the reagent A comprises sodium nitrite A1 and ammonium chloride A2, and the reagent B comprises a catalyst and a foaming agent. According to the invention, by injecting the chemical agents in the well in batches and through different channels, chemical agents are in chemical reaction in the well to generate lots of gases and foam, under the action of gases generated by chemical reaction, foam moves upwards to drain accumulated liquid in a wellbore, and thus a conventional foam drainage gas recovery process is expanded to peripheral wells and flooded out wells with extremely low yields, and the recovery percent of the gas well is increased further.

Description

technical field [0001] The invention relates to a gas well drainage gas recovery technology, in particular to a foam drainage gas recovery technology for edge wells and flooded wells with low output. Background technique [0002] The conventional foam drainage gas recovery process is to inject the foam drainage agent into the wellbore, mix it with the fluid in the wellbore, and use the natural gas flow in the wellbore to stir to generate a large amount of foam, reduce the fluid density in the wellbore, change the flow state of the wellbore, and achieve drainage. Gas extraction purpose. This technology is suitable for gas wells with certain energy, but it is not effective for wells with extremely low production and multi-layer combined production wells. [0003] Another Chinese patent number is 201210526560.1, and the publication date is 2014.6.18, which discloses a method for self-produced gas foam drainage of low-production and low-pressure gas wells; in water-flooded gas ...

Claims

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Application Information

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IPC IPC(8): E21B43/22C09K8/58
Inventor 江键周兴付张云善鲁光亮李祖友王子夜苏黎晖傅春梅荆华胡腾张林张帆师春雪刘丝雨何志君
Owner CHINA PETROLEUM & CHEM CORP
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