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Non-ionic compound gas hydrate anti-agglomerant

A gas hydrate and composite technology, which is applied in the direction of drilling composition, gas/liquid distribution and storage, pipeline system, etc., can solve the problems of insignificant anti-polymerization effect, poor biodegradability, high price, etc., and achieve good Application prospect, low addition amount, high supercooling effect

Inactive Publication Date: 2014-06-18
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the above antipolymerization agents have the characteristics of toxicity, poor biodegradability, high price, and inconspicuous antipolymerization effect.

Method used

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  • Non-ionic compound gas hydrate anti-agglomerant
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  • Non-ionic compound gas hydrate anti-agglomerant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This example provides a nonionic composite gas hydrate antipolymerization agent, which is composed of alkyl glycoside nonionic surfactant APG1214 and polyol type nonionic surfactant Span20 in a mass ratio of 1:1 Than obtained by mixing.

[0045] Apply the above-mentioned non-ionic composite gas hydrate antipolymerization agent to the oil-gas-water three-phase mixed transportation system with a water content of 10% (calculated based on the sum of the volumes of water and oil), and analyze the The use effect of non-ionic composite gas hydrate antipolymerization agent was evaluated.

[0046] In this example, a high-pressure fully transparent sapphire reactor is used for the application evaluation experiment. The structure of the high-pressure fully transparent sapphire reactor is as follows figure 1 shown. The reactor is a common equipment for evaluating the inhibitory effect of gas hydrate antipolymerization agent, mainly including high-pressure sapphire reactor body 1,...

Embodiment 2

[0059] This embodiment provides a nonionic composite gas hydrate antipolymerization agent, which is composed of alkyl glycoside nonionic surfactant APG1214 and polyol type nonionic surfactant Span20 in a mass ratio of 0.25:1 Than obtained by mixing.

[0060] In this example, the high-pressure fully transparent sapphire reactor described in Example 1 is used to conduct an application evaluation experiment, and the specific experimental process is as described in Example 1.

[0061] In this example, the oil-water system in the reactor is composed of 1.5mL of deionized water and 13.5mL of -20# diesel oil, that is, a mixed transportation system with a water content of 10% (calculated based on the sum of the volumes of water and oil) , the amount of antipolymerization agent added in this embodiment is 3.0% of the water mass in the system, and the composition of the gas introduced is shown in Table 1.

[0062] During the whole experiment process of this example, the gas hydrate par...

Embodiment 3

[0064] This example provides a nonionic composite gas hydrate antipolymerization agent, which is composed of alkyl glycoside nonionic surfactant APG1214 and polyol type nonionic surfactant Span20 in a mass ratio of 0.5:1 Than obtained by mixing.

[0065] In this example, the high-pressure fully transparent sapphire reactor described in Example 1 is used to conduct an application evaluation experiment, and the specific experimental process is as described in Example 1.

[0066] In this example, the oil-water system in the reactor is composed of 1.5mL of deionized water and 13.5mL of -20# diesel oil, that is, a mixed transportation system with a water content of 10% (calculated based on the sum of the volumes of water and oil) , the amount of antipolymerization agent added in this embodiment is 3.0% of the water mass in the system, and the composition of the gas introduced is shown in Table 1.

[0067] During the whole experiment process of this example, the gas hydrate particl...

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Abstract

The invention provides a non-ionic compound gas hydrate anti-agglomerant which consists of an alkyl polyglycoside non-ionic surfactant and a polyhydric alcohol non-ionic surfactant in a weight ratio of (0.01-100):1. The gas hydrate anti-agglomerant is used for anti-agglomerating treatment of an oil-gas-water three phase mixed conveying system, wherein the volume of water accounts for less than or equal to 60% of the total volume of oil and water. The invention further provides an anti-agglomerating method adopting the non-ionic compound gas hydrate anti-agglomerant. The method comprises the step of adding the non-ionic compound gas hydrate anti-agglomerant into the oil-gas-water three phase mixed conveying system. The non-ionic compound gas hydrate anti-agglomerant provided by the invention is suitable for oil-gas-water three phase co-existing systems and is less in use level, good in biodegradability, economic and environmental friendly and remarkable in anti-agglomerating effect.

Description

technical field [0001] The invention relates to an efficient and environment-friendly non-ionic composite gas hydrate antipolymerization agent and an application thereof, belonging to the technical field of oil and gas production. Background technique [0002] Gas hydrates are water and some small molecular gases (such as CH 4 、C 2 h 6 , CO 2 and H 2 S, etc.) or volatile liquids are non-stoichiometric cage-like crystal substances formed under certain temperature and pressure conditions, so they are also called clathrate hydrates. There are three types of gas hydrate crystal structures that have been discovered so far, which are commonly called type I, type II and type H. The water molecules that form gas hydrates are called host molecules, and the other components that form gas hydrates are called guest molecules. The discovery of gas hydrate has a history of more than 200 years. As early as 1778, British philosopher and naturalist Joseph Priestley accidentally discove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524F17D1/02F17D1/08
CPCC09K8/524C09K8/528C09K8/532C09K2208/22F17D1/005
Inventor 孙长宇陈光进闫柯乐李清平庞维新
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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