Preparation method and application of a novel environmentally friendly and efficient gas hydrate inhibitor

A gas hydrate and inhibitor technology, applied in drilling compositions, chemical instruments and methods, gas/liquid distribution and storage, etc., to achieve the effects of inhibiting nucleation, low toxicity, and good inhibiting effect

Active Publication Date: 2022-07-01
郑州洁灵科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is greatly affected by the subcooling degree of the system, and the subcooling degree is generally less than 10°C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]The preparation method of the novel environmentally friendly and efficient gas hydrate inhibitor of this embodiment, the novel environmentally friendly and efficient gas hydrate inhibitor contains 2-vinylpyridine-N-vinyl-2-pyrrolidone copolymer with a mass concentration of 0.6%, Nonionic surfactants with a mass concentration of 1.8%, glycol ethers with a mass concentration of 4.1%, water-soluble monomers with a mass concentration of 2.4%, and the rest are deionized water;

[0037] And the preparation method of the above-mentioned novel environmentally friendly and efficient gas hydrate inhibitor comprises the following steps:

[0038] (a) Oil phase preparation: Add 2-vinylpyridine-N-vinyl-2-pyrrolidone copolymer and non-ionic surfactant to glycol ethers respectively, and stir at room temperature and rotating speed of 900r / min. 30min to obtain oil phase;

[0039] (b) Aqueous phase preparation: add water-soluble monomers into deionized water, stir evenly to prepare a solu...

Embodiment 2

[0049] The preparation method of the novel environmentally friendly and efficient gas hydrate inhibitor of this embodiment, the novel environmentally friendly and efficient gas hydrate inhibitor contains 2-vinylpyridine-N-vinyl-2-pyrrolidone copolymer with a mass concentration of 1.0%, Nonionic surfactants with a mass concentration of 3.4%, glycol ethers with a mass concentration of 5.8%, water-soluble monomers with a mass concentration of 4.2%, and the rest are deionized water;

[0050] And the preparation method of the above-mentioned novel environmentally friendly and efficient gas hydrate inhibitor comprises the following steps:

[0051] (a) Oil phase preparation: add 2-vinylpyridine-N-vinyl-2-pyrrolidone copolymer and non-ionic surfactant to glycol ethers, and stir at room temperature and rotating speed of 1300r / min. 50min to obtain oil phase;

[0052] (b) Aqueous phase preparation: add water-soluble monomers into deionized water, stir evenly to prepare a solution, and o...

Embodiment 3

[0062] The preparation method of the novel environmentally friendly and efficient gas hydrate inhibitor of this embodiment, the novel environmentally friendly and efficient gas hydrate inhibitor contains 2-vinylpyridine-N-vinyl-2-pyrrolidone copolymer with a mass concentration of 0.8%, Nonionic surfactants with a mass concentration of 2.6%, glycol ethers with a mass concentration of 4.9%, water-soluble monomers with a mass concentration of 3.3%, and the rest are deionized water;

[0063] And the preparation method of the above-mentioned novel environmentally friendly and efficient gas hydrate inhibitor comprises the following steps:

[0064] (a) Oil phase preparation: Add 2-vinylpyridine-N-vinyl-2-pyrrolidone copolymer and non-ionic surfactant to glycol ethers respectively, and stir at room temperature and rotating speed of 1100r / min. 40min to obtain oil phase;

[0065] (b) Aqueous phase preparation: add water-soluble monomers into deionized water, stir evenly to prepare a so...

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Abstract

The invention relates to the technical field of oil and gas production, in particular to a preparation method and application of a novel environment-friendly and efficient gas hydrate inhibitor. The novel environmentally friendly and efficient gas hydrate inhibitor contains 2-vinylpyridine-N-vinyl-2-pyrrolidone copolymer with a mass concentration of 0.6%-1.0%, and a nonionic surface active agent with a mass concentration of 1.8%-3.4% agent, glycol ethers with a mass concentration of 4.1%-5.8%, water-soluble monomers with a mass concentration of 2.4%-4.2%, and the rest are deionized water. And the preparation method of the inhibitor includes the following steps: oil phase preparation, water phase preparation, mixing reaction and other steps. The inhibitor prepared by the invention has good inhibitory effect, can effectively inhibit the nucleation of hydrate, so that the generated hydrate presents a uniform and stable slurry without hydrate aggregation, and the inhibitor has low toxicity, It has the advantages of non-volatile, easy degradation, and environmental friendliness, and has good application prospects.

Description

technical field [0001] The invention relates to the technical field of oil and gas production, in particular to a preparation method and application of a novel environmentally friendly and efficient gas hydrate inhibitor. Background technique [0002] Gas hydrate is a special cage compound, which is a non-chemical non-chemical compound formed by water (host molecule) and small molecules (guest molecules) such as methane, ethane, propane, propylene, nitrogen, and carbon dioxide at a certain temperature and pressure. Metered clathrate solid crystalline substances, also known as clathrate hydrates. There are mainly three crystal structures of gas hydrates that have been discovered and studied, namely I-type, II-type and H-type structures. In the following decades, many scholars have conducted research on natural gas hydrate, and the developed gas hydrate application technology also involves many fields such as water resources, environmental protection, climate, oil and gas sto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/52F17D1/17
CPCC09K8/52F17D1/17C09K2208/22
Inventor 张星杰
Owner 郑州洁灵科技有限公司
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