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A kind of foaming agent for coalbed methane reservoir drilling and its preparation method and application

A technology of coalbed methane and foaming agent, which is applied in the field of coalbed methane reservoir drilling, can solve the problems of lack of foaming agent, etc., and achieve the effects of keeping the wellbore clean, good upper formation leakage prevention and plugging, and good foam performance

Active Publication Date: 2020-03-10
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently commonly used foaming agents are all from the daily chemical industry, and there is a lack of special foaming agents suitable for protecting coalbed methane reservoir drilling

Method used

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  • A kind of foaming agent for coalbed methane reservoir drilling and its preparation method and application
  • A kind of foaming agent for coalbed methane reservoir drilling and its preparation method and application
  • A kind of foaming agent for coalbed methane reservoir drilling and its preparation method and application

Examples

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Effect test

Embodiment 1

[0026] This embodiment provides a foaming agent for coalbed methane reservoir drilling, in parts by weight, the raw material components of the foaming agent for coalbed methane reservoir drilling include:

[0027]

[0028] The present embodiment also provides a preparation method of the above-mentioned foaming agent for coalbed methane reservoir drilling, which includes the following steps:

[0029] Step 1: Add lauric acid, sodium sulfite, ethanolamine, sodium hydroxide and water into the reaction kettle with enamel substrate according to the amount of raw materials added above, and heat up to 130°C under constant stirring;

[0030] Step 2, then add formamide and caprolactam according to the above raw materials, continue heating and stirring at 130°C for 6 hours, stop stirring when cooling to 90°C, and naturally cool to room temperature to obtain a yellow or light yellow liquid, which is coalbed methane drilling Use foaming agent.

[0031] This embodiment also provides the...

Embodiment 2

[0034] This embodiment provides a foaming agent for coalbed methane reservoir drilling, in parts by weight, the raw material components of the foaming agent for coalbed methane reservoir drilling include:

[0035]

[0036] The present embodiment also provides a preparation method of the above-mentioned foaming agent for coalbed methane reservoir drilling, which includes the following steps:

[0037] Step 1: Add lauric acid, sodium sulfite, ethanolamine, sodium hydroxide and water into the reaction kettle with enamel substrate according to the amount of raw materials added above, and heat up to 130°C under constant stirring;

[0038] Step 2, then add formamide and caprolactam according to the above raw materials, continue heating and stirring at 130°C for 6 hours, stop stirring when cooling to 90°C, and naturally cool to room temperature to obtain a yellow or light yellow liquid, which is coalbed methane drilling Use foaming agent.

Embodiment 3

[0040] This embodiment provides a foaming agent for coalbed methane reservoir drilling, in parts by weight, the raw material components of the foaming agent for coalbed methane reservoir drilling include:

[0041]

[0042] The present embodiment also provides a preparation method of the above-mentioned foaming agent for coalbed methane reservoir drilling, which includes the following steps:

[0043] Step 1: Add palmitic acid, sodium sulfite, ethanolamine, sodium hydroxide and water into a reaction kettle with an enamel substrate according to the amount of raw materials added above, and heat up to 130°C under constant stirring;

[0044] Step 2, then add formamide and caprolactam according to the above raw materials, continue heating and stirring at 130°C for 6 hours, stop stirring when cooling to 90°C, and naturally cool to room temperature to obtain a yellow or light yellow liquid, which is coalbed methane reservoir drilling Use foaming agent.

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Abstract

The invention provides a foaming agent for coal bed reservoir drilling, and a preparation method and application thereof. The foaming agent for coal bed reservoir drilling comprises the following components in parts by weight: 30-50 parts of fatty acid, 0.5-10 parts of sodium sulfite, 20-40 parts of ethanolamine, 10-30 parts of formamide, 2-9 parts of sodium hydroxide, 1-10 parts of caprolactam and 250-400 parts of water. The foaming agent provided by the invention has favorable foam property; and when being used in coal bed reservoir drilling, the foaming agent can be reutilized, can keep favorable foam volume and half life, can maximally protect the reservoir, and has the functions of well keeping the shaft wall clean and preventing and stopping leakage of the upper stratum.

Description

technical field [0001] The invention belongs to the technical field of coalbed gas reservoir drilling, and relates to a foaming agent for coalbed gas reservoir drilling and its preparation method and application. Background technique [0002] The goal of energy development is to increase output, obtain greater benefits, and maximize output. Protecting the reservoir and maintaining the original state of the reservoir to the greatest extent is the key to the efficient development of fossil energy. However, when foreign fluids enter the reservoir, these fluids inevitably come into contact with the reservoir rocks, and a series of physical-chemical reactions occur, resulting in Reservoir damage, sometimes even delays correct understanding of the reservoir. Different types of reservoirs have different characteristics of reservoirs. Coalbed methane reservoirs are different from conventional oil and gas reservoirs in that they are porous organic rock reservoirs containing inorgani...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/22C09K8/42
CPCC09K8/22C09K8/426
Inventor 赖晓晴鲜保安康晓娜田毅李彦琴陈华兵王金宏杨峥孙月明
Owner BC P INC CHINA NAT PETROLEUM CORP
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