Foam discharge agent for gas well drainage and gas recovery

A technology of drainage and gas extraction and foam discharge agent, which is applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problem that the foam discharge agent does not have low pH value and high temperature resistance performance, and the foam discharge agent does not have high resistance. Salt comprehensive performance and other issues, to achieve good water-carrying effect, excellent foaming performance, good foam stability

Active Publication Date: 2018-07-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The foam release agent introduced in the periodical "Natural Gas Industry", Volume 15, Issue 2, 1995, "Research on the Foam Performance of Foam Release Agent CZP", has a high salt (250000mg / L) and a wide pH range (5-13) It has good foam performance inside and has good anti-H 2 S performance, but the maximum temperature resistance is 90°C; the foam discharge agent does not have the performance of low pH value and high temperature resistance
The foaming agent introduced in the journal "Progress in Fine Petrochemical Industry" Volume 8, Issue 12, 2007 "Laboratory Evaluation of a High-temperature Foaming Agent" has a maximum resistance of 130°C and a salt resistance of 17642.6mg / L, 17238.6mg / L L; but this foaming agent does not have the comprehensive performance of resistance to high salt, hydrogen sulfide atmosphere and wide pH environment

Method used

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  • Foam discharge agent for gas well drainage and gas recovery
  • Foam discharge agent for gas well drainage and gas recovery
  • Foam discharge agent for gas well drainage and gas recovery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 15% mass quaternary ammonium salt gemini surfactant 12-3-12, 20% mass cocoamidopropyl betaine, and 2% mass fluorocarbon surfactant FS-73 into the reactor with agitator , 5% quality polyacrylamide (molecular weight 6×10 6 g / mol), 58% mass water, stir for 30 minutes to completely dissolve, and then obtain a wide pH, high temperature and high salt foam discharge agent for drainage and gas recovery. After 24 hours of high-temperature aging, the foam volume was tested by stirring.

Embodiment 2

[0024] Add 20% by mass quaternary ammonium salt gemini surfactant 16-4-16, 15% by mass lauroylaminopropyl betaine, and 1% by mass fluorocarbon surfactant FS-53, into a reactor with a stirrer. 7% quality polyacrylamide (molecular weight 1.2×10 7 g / mol), 57% water by mass, stir for 30 minutes to fully dissolve, and then obtain a wide pH, high temperature and high salt foam discharge agent for drainage and gas recovery. After 24 hours of high-temperature aging, the foam volume was tested by stirring.

Embodiment 3

[0026] Add 25% by mass quaternary ammonium salt gemini surfactant 14-6-14, 25% by mass cocoamidopropyl betaine, and 3% by mass fluorocarbon surfactant FS-73 in the reactor with agitator , 3% mass polyacrylamide (molecular weight 1×10 7 g / mol), 44% mass water, stir for 30 minutes to fully dissolve, and then obtain a wide-pH-value, high-temperature and high-salt foam discharge agent for drainage and gas recovery. After 24 hours of high-temperature aging, the foam volume was tested by stirring.

[0027] Examples 4 to 8 follow the methods of Examples 1, 2, and 3, the formulations are shown in Table 1 below, and the performance test results are shown in Table 2 below.

[0028] Table 1 Examples of foaming agents

[0029]

[0030] Table 2 The foaming ability, thermal stability, foam stability and other performance test results of the foaming agents of Examples 1-8

[0031]

[0032]

[0033] It can be seen from the data in Table 2 that the foaming agent for gas well drainage and recovery of ...

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Abstract

Belonging to the technical field of oil-gas field chemical agents, the invention relates to a foaming drainage agent for gas well drainage gas recovery. The foaming drainage agent for gas well drainage gas recovery is formed by mixing of a gemini surfactant, a zwitterionic surfactant, a high-bond energy surfactant and a macromolecular polymer. The foaming drainage agent provided by the invention has high temperature environment resistance (up to 180DEG C), suitability to environment with wide pH value (of 1-10), high mineralization degree resistance (greater than or equal to 320000mg / L), and resistance to hydrogen sulfide and carbon dioxide atmosphere (with the hydrogen sulfide partial pressure being greater than or equal to 25% and the carbon dioxide partial pressure being greater than or equal to 20%). And the foaming drainage agent also has the advantages of excellent foaming performance, good foam stability, good water-carrying effect, low surface tension, and foam volume mostly higher than 8 times.

Description

Technical field [0001] The invention relates to a bubble discharge agent for gas well drainage and gas production, and belongs to the technical field of oil and gas field chemical agents. Background technique [0002] Foam drainage gas recovery is a drainage aid technology that adds foam drainage agent (abbreviated as foam drainage agent) to the gas well. It can easily achieve the purpose of clearing the bottom of the well and improving the mining efficiency without affecting the production and construction of the gas well. Simple, so it is widely used. When the temperature and salinity of the working conditions increase, the foaming ability and stability of the foaming agent are greatly reduced, resulting in failure. With the emergence of various special situations in newly developed gas fields, the applicable foaming agent is required to have comprehensive performance in many aspects. For example, the newly developed Puguang gas field and Yuanba gas field in the Sichuan Basin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584C09K8/588
CPCC09K8/584C09K8/588
Inventor 王树涛黄雪松叶海木赵斌张庆生欧天雄胡庆祥刘晓敏
Owner CHINA PETROLEUM & CHEM CORP
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