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Natural gas hydrate inhibitor

A hydrate inhibitor and natural gas technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of reducing the growth or coalescence speed of hydrates, achieve obvious inhibitory effect, less usage, and environmental hazards small effect

Active Publication Date: 2010-01-20
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an efficient combined inhibitor for inhibiting gas hydrate formation, which can overcome the problems existing in traditional thermodynamic inhibitors and single kinetic inhibitors, and effectively delay the formation of hydrate crystals in oil and gas pipelines. Nucleation, slow hydrate growth or coalescence rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: Polyvinylpyrrolidone, polyetheramine and ethylene glycol butyl ether are configured into a 200g aqueous solution with a mass concentration of 0.2% according to a mass ratio of 1:1:1, and are loaded into a stirred reactor. The experimental gas is a mixed gas (methane 91.95%, ethane 5.00% and propane 3.05%), the reaction temperature is 277.15K, and the inhibition time of natural gas hydrate formation is 1650 minutes.

Embodiment 2

[0013] Example 2: Polyvinylpyrrolidone, polyetheramine and ethylene glycol butyl ether are configured into a 200g aqueous solution with a mass concentration of 0.75% according to a mass ratio of 1:1:1, and are loaded into a stirred reactor. The experimental gas is a mixed gas (methane 91.95%, ethane 5.00% and propane 3.05%), the reaction temperature is 277.15K, and the inhibition time of natural gas hydrate formation is 14850 minutes.

Embodiment 3

[0014] Example 3: Polyvinylpyrrolidone, polyether amine and ethylene glycol butyl ether are configured into a 2.0% aqueous solution with a mass concentration of 2.0% according to a mass ratio of 1:1:1, and put into a stirred reactor. The experimental gas is a mixed gas (methane 91.95%, ethane 5.00% and propane 3.05%), the reaction temperature is 277.15K, and the inhibition time of natural gas hydrate formation is 3580 minutes.

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PUM

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Abstract

The invention provides a high effective synthetic inhibitor for inhibiting the formation of gas hydrate which is prepared by using polyvinylpyrrolidone, polyether amine and ethylene glycol butyl ether in combination according to a weight ratio of 1:1:1. When using, the total mass concentration of the inhibitor is 0.2-2.0%. The inhibitor of the invention is mainly used to inhibit the formation of natural gas hydrate in gas-oil pipelines and can be also used in oil-gas field exploitation systems. The inhibitor has obvious inhibition effect, low dosage and little damage to the environment so that the inhibitor has the advantage of high efficiency, economy and environmental friend.

Description

technical field [0001] The invention relates to the technical field of chemistry and chemical engineering, in particular to a novel combined gas hydrate inhibitor. technical background [0002] Gas hydrate is an ice-like cage crystal compound formed by light hydrocarbons such as methane, ethane, propane, hydrogen sulfide, carbon dioxide and other gas molecules reacting with water at low temperature and high pressure. Once formed and coalesced, the flow area of ​​the pipeline will be reduced, throttling will occur, and the further formation of hydrate will be accelerated, thereby blocking the pipeline and equipment in the process of natural gas exploration and transportation and oil fluid process, seriously affecting the production of oil and natural gas. Safe operation of mining, transportation and processing. Therefore, how to avoid and prevent the formation of hydrates in the process of oil and gas production and transportation has become an urgent problem to be solved in...

Claims

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Application Information

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IPC IPC(8): C09K8/52
Inventor 梁德青戴兴学杜建伟唐翠萍
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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