Efficient compound-type hydrate dynamics inhibitor

Abstract

The invention provides an efficient compound-type hydrate dynamics inhibitor. The efficient compound-type hydrate dynamics inhibitor comprises a dynamics inhibitory component, a dynamics inhibitor assistant and a dynamics inhibitor solvent. By means of the dynamics inhibitor, the defects that a traditional thermodynamical inhibitor is large in use quantity, high in economic cost, large in environment pollution and the like are overcome. Compared with a common hydrate dynamics inhibitor and a common hydrate polymerization inhibitor, by means of the dynamics hydrate inhibitor, the formation rate of a hydrate can be effectively inhibited, the blocking forming time of the hydrate is delayed, and the efficient compound-type hydrate dynamics inhibitor has the advantages of being small in use quantity, capable of bearing the large super-cooling degree, stable in performance, economical, efficient and the like, is suitable for an oil-air-water three-phase or air-water two-phase mixing transmission system, and has the good application prospects.

Description

technical field [0001] The invention relates to the technical field of oil and gas pipeline transportation, in particular to a high-efficiency composite hydrate kinetic inhibitor. Background technique [0002] In the process of oil and gas extraction and gathering, due to its special high pressure and low temperature environment, hydrocarbon gases with low boiling points (such as natural gas components, CO 2 、H 2 S, etc.) can easily form a kind of ice-like solid compound with a cage structure with water molecules, which is often called combustible ice. Hydrates will grow and accumulate rapidly after formation, causing pipeline flow obstacles, such as hydrate solids clogging wellbore or gathering and transportation pipelines, valves, safety tanks and other devices with throttling effects, resulting in production stoppage, production reduction or even pipeline rupture, resulting in oil and gas leakage polluted environment. Therefore, how to effectively prevent and control t...

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Problems solved by technology

[0004] In terms of the development of hydrate kinetic inhibitors, the Chinese patent CN103305200A "A Composite Hydrate Inhibitor" relates to a composite hydrate inhibitor consisting of polyvinyl caprolactam, alcohol or salt, and water, but the Inhibitors are greatly affected by the subcooling of the system, and the salts in the inhibitors have a risk of corrosion to the pipeline, and the existence of the water phase increases the risk of hydrate blockage

Chinese patent CN101602940A "Efficient Kinetic Hydrate Inhibitor" synthesizes a compound with a unique unit structure as a hydrate kinetic inhibitor. Through adsorption, it inhibits the hydrate particles from remaining dispersed without aggregation, thereby inhibiting the formation of hydrates. However, this The invention is greatly affected by the supercooling degree of the system, high cost, complex synthesis process, many intermediate by-products, poor biodegradability, and certain pollution to the environment

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