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Foam drainage agent for gas well drainage gas recovery

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

Active Publication Date: 2014-11-12
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 drainage agent for gas well drainage gas recovery
  • Foam drainage agent for gas well drainage gas recovery
  • Foam drainage agent for gas well drainage gas recovery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

Embodiment 2

[0024] Add 20% mass quaternary ammonium salt gemini surfactant 16-4-16, 15% mass lauroylamine propyl betaine, 1% mass fluorocarbon surfactant FS-53, 7% mass polyacrylamide (molecular weight 1.2×10 7 g / mol), 57% quality water, stirred for 30 minutes until completely dissolved, and then the wide pH value, high temperature and high salt foaming agent for drainage and gas recovery is obtained. After 24 hours of high-temperature aging, the foam volume was tested by stirring method.

Embodiment 3

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

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

[0028] The embodiment of table 1 foam discharge agent

[0029]

[0030] Table 2 Performance Test Results of Foaming Ability, Thermal Stability, and Foam Stability of the Foam Unloading Agents of Examples 1-8

[0031]

[0032]

[0033] From the data in Table 2, it can be seen th...

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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 foaming agent for gas well drainage and gas recovery, which belongs to the technical field of chemical agents for oil and gas fields. Background technique [0002] Foam drainage gas recovery is a drainage aiding process that adds foam drainage agent (referred to as foam drainage agent) to the gas well, which can easily achieve the purpose of clearing the bottom fluid and improving the production efficiency without affecting the production and construction of the gas well. Simple and therefore widely used. When the temperature and salinity of the working conditions increase, the foaming ability and stability of the foaming agent will be greatly reduced, resulting in failure. With the emergence of various special conditions of gas wells in newly developed gas fields, it is required that the applicable foaming agent has comprehensive performance in many aspects. For example, the newly developed Puguang Gas Field and Yuanba Gas...

Claims

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Application Information

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Patent Type & Authority Applications(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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