Solid foamed drainage agent for natural gas well and preparation method of solid foamed drainage agent

A foam drainage agent and natural gas technology, applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve the problems of poor spontaneous foaming performance, weak methanol capacity, and non-environmental components, and achieve self-foaming Strong ability, convenient dosing, good compatibility effect

Inactive Publication Date: 2014-12-10
SHAANXI YUTENG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of the above two foam drainage agents is high, the composition is not environmentally friendly, the spontaneous foaming performance is poor, and the oil and methanol resistance are weak. The present invention overcomes the above shortcomings one by one.

Method used

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  • Solid foamed drainage agent for natural gas well and preparation method of solid foamed drainage agent
  • Solid foamed drainage agent for natural gas well and preparation method of solid foamed drainage agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The solid foam drainage agent of the present invention is made of the following raw materials in mass ratio: 30% of surfactant, 2% of imidazoline quaternary ammonium salt, 10% of sodium peroxide, 20% of citric acid and 38% of thiourea.

[0023] The mass percentage of each raw material in the surfactant in the solid foam drainage agent: AESA (fatty alcohol polyoxyethylene ether ammonium sulfate) 10%, lauryl dimethyl amine oxide 5%, cardamom dimethyl amine oxide 5%, AEO- 3 (fatty alcohol polyoxyethylene ether) 10%.

[0024] The concrete preparation method of solid foam drainage agent of the present invention comprises the following steps:

[0025] A. Compounding of surfactants

[0026] According to the above ratio, add the aqueous solution of lauryl dimethyl amine oxide and cardamom dimethyl amine oxide into a 500ml three-neck flask equipped with a stirrer, reflux tube, and thermometer. When the temperature rises to 80°C, add AESA and AEO-3 , stirred and heated up to 12...

Embodiment 2

[0030] The solid foam drainage agent of the present invention is made of the following raw materials in mass ratio: 28% of surfactant, 3% of imidazoline quaternary ammonium salt, 12% of sodium peroxide, 25% of citric acid and 32% of thiourea.

[0031] The mass percentage of each raw material in the surfactant in the solid foam drainage agent: AESA 10%, lauryl dimethyl amine oxide 5%, cardamom dimethyl amine oxide 5%, AEO-38%.

[0032] The concrete preparation method of solid foam drainage agent of the present invention comprises the following steps:

[0033] A. Compounding of surfactants

[0034] According to the above ratio, add the aqueous solution of lauryl dimethyl amine oxide and cardamom dimethyl amine oxide into a 500ml three-necked flask equipped with a stirrer, reflux tube, and thermometer. When the temperature rises to 100°C, add AESA and AEO-3 , stirred and heated to 120°C, refluxed at constant temperature for 1 hour, and then distilled off the water, and the compo...

Embodiment 3

[0038] The solid foam drainage agent of the present invention is made of the following raw materials in mass ratio: 28% of surfactant, 1% of imidazoline quaternary ammonium salt, 10% of sodium peroxide, 21% of citric acid and 40% of thiourea.

[0039] The mass percentage of each raw material in the surfactant in the solid foam drainage agent: AESA 15%, lauryl dimethyl amine oxide 2.5%, cardamom dimethyl amine oxide 2.5%, AEO-38%.

[0040] The concrete preparation method of solid foam drainage agent of the present invention comprises the following steps:

[0041] A. Compounding of surfactants

[0042] According to the above ratio, add the aqueous solution of lauryl dimethyl amine oxide and cardamom dimethyl amine oxide into a 500ml three-necked flask equipped with a stirrer, reflux tube, and thermometer. When the temperature rises to 90°C, add AESA and AEO-3 , stirred and heated to 120°C, refluxed at constant temperature for 1 hour, and then distilled off the water until the s...

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Abstract

The invention discloses a solid foamed drainage agent for a natural gas well and a preparation method of the solid foamed drainage agent. The solid foamed drainage agent is prepared from the following raw materials in percentage by mass: 25-30 percent of surfactant, 1-3 percent of imidazoline quaternary ammonium salt, 10-15 percent of sodium peroxide, 20-25 percent of citric acid and 30-40 percent of thiourea. The solid foamed drainage agent is novel in components, non-toxic and environment-friendly, strong in self-foaming capability and good in foaming stability and has the foaming stability to a maximum of 169mm, the liquid carrying capability to a maximum of 83 percent, the gas condensate resistance capability up to 50 percent, the methanol resistance capability up to 40 percent, the mineralization resistance capability of 200,000mg / L and the optimal effective concentration of 0.45-0.65 percent; and in addition, the solid foamed drainage agent is convenient to feed, has a corrosion inhibition effect and has the advantages of reducing the production cost and improving the working efficiency.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemistry, and relates to a solid foam drainage agent for gas fields, in particular to a solid spontaneous foam drainage agent integrating foam drainage and pipeline anticorrosion and a preparation method thereof. Background technique [0002] In the middle and late stages of natural gas well exploitation, due to the decline of the formation energy of the gas well itself, formation water also enters the wellbore along with the natural gas, and accumulates at the bottom of the well or near the well, resulting in a decrease in the gas production of the gas well or flooding of the gas well, which damages the formation near the gas well. There are two main sources of formation water: one is the immersion of free water in the bottom layer, such as edge water, bottom water, and interlayer water; Condensate water appears. Formation water and natural gas contain corrosive gases such as carbon dioxide an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584C09K8/54
Inventor 陈力群樊景云党江敏尹晓宏
Owner SHAANXI YUTENG IND
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