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Ionic hydrate inhibitor

A hydrate inhibitor, ionic technology, used in drilling compositions, pipeline systems, chemical instruments and methods, etc., can solve the problem of low inhibitory activity, achieve high inhibitory activity, reduce viscosity, chemical stability and Good thermal stability

Inactive Publication Date: 2014-03-12
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, kinetic inhibitors are greatly affected by the degree of subcooling. At present, the highest supercooling degree applicable to kinetic inhibitors is only 10-12°C. The combination of anti-aggregation agent is economical and effective

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 0.005% ionic liquid (PMIM-Cl, HMIM-Cl), the experimental procedure is the same as above, the results show that the reaction completion time is 320min, and the pressure drop of methane gas is 0.7MPa, which is not very obvious compared with pure water.

Embodiment 2

[0035] 0.01% ionic liquid (PMIM-Cl, HMIM-Cl), the experimental procedure is the same as above, the results show that the reaction completion time is 620min, the pressure drop of methane gas is 0.67MPa, and the inhibition performance is obviously improved.

Embodiment 3

[0037]0.05% ionic liquid (PMIM-Cl, HMIM-Cl), the experimental procedure is the same as above, the results show that the reaction completion time is 1100min, the pressure drop of methane gas is 0.6MPa, and the inhibition performance is significantly improved.

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PUM

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Abstract

The invention relates to an ionic hydrate inhibitor which is prepared by dissolving an ionic liquid in a water solution, wherein the mass concentration of the ionic liquid is 0.005-0.01%; the ionic liquid is composed of imidazole cations and chloride ions; and the solvent is water. The hydrate inhibitor has the advantages of better inhibitory effect, low consumption and small influence by degree of supercooling, is easy to recycle and is more environment-friendly.

Description

technical field [0001] The invention belongs to the field of petroleum engineering, and in particular relates to a gas hydrate inhibitor. Background technique [0002] Gas hydrate is a cage structure formed by water molecules connected by hydrogen bonds, and small gas molecules are surrounded in the cage structure by van der Waals force to form an ice-like compound. During the extraction and transportation of oil and natural gas, various low-boiling hydrocarbon gases (such as methane, ethane, propane) and non-hydrocarbon gases (carbon dioxide, hydrogen sulfide) are easily Forms gas hydrates with water in petroleum fluids. It gathers together under certain conditions to form lumps, and in severe cases, it will block equipment such as pipelines, wellbores, valves, and instruments, which poses a great threat to the production, storage and transportation of the oil and gas industry. [0003] The main conditions for the formation of natural gas hydrates are: (1) the water conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524F17D1/02
CPCC09K8/524C09K2208/22F17D1/02
Inventor 王树立马维俊周诗岽李恩田
Owner CHANGZHOU UNIV
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