Compound type hydrate inhibitor

An inhibitor and composite technology, applied in drilling compositions, piping systems, chemical instruments and methods, etc., can solve the problems of low inhibitory activity, damage to the internal components of the wellbore, increase the pressure difference of the pipeline, etc. Time, wide range of applications, effect of improving suppression effect

Inactive Publication Date: 2013-09-18
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) Hydrate generated in the pipeline will block the pipeline, increase the pressure difference of the pipeline, damage the pipe fittings, etc.;
[0004] (2) The formation of hydrates in the porous media of formations will block oil and gas wells, reduce the porosity and relative permeability of oil and gas reservoirs, change the distribution of oil and gas in oil and gas reservoirs, and reduce the production of oil and gas wells;
[0005] (3) The formation of hydrate in

Method used

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  • Compound type hydrate inhibitor
  • Compound type hydrate inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 0.1% PVCap and 1% ethylene glycol compound, the experimental procedure is the same as above, the results show that the induction time is 65min, the reaction completion time is 180min, the pressure drop of methane gas is 0.6MPa, and its inhibition performance is more obvious than that of pure water.

Embodiment 2

[0043] 0.1% PVCap and 3% ethylene glycol compounded, the experimental procedure is the same as above, the results show that the induction time is 78min, the reaction completion time is 200min, the pressure drop of methane gas is 0.5MPa, and its inhibition performance is significantly improved.

Embodiment 3

[0045] 0.1% PVCap and 5% ethylene glycol were compounded, the experimental procedure was the same as above, the results showed that the induction time was 85min, the reaction completion time was 215min, the pressure drop of methane gas was 0.45MPa, and the inhibition performance was significantly improved.

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PUM

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Abstract

The invention belongs to the field of gas storage and transportation, and specifically relates to a compound type gas hydrate inhibitor. The inhibitor consists of the following components in percentage by mass: 0.1-0.5% of polyvinyl caprolactam, 1-5% of alcohol or salt and the balance of water. According to the inhibitor provided by the invention, by adding a certain amount of salt or alcohol into the existing dynamic inhibitor, the generation time of a hydrate can be increased, and the generation amount of the hydrate can be reduced; and moreover, the inhibition effect of the dynamic inhibitor is greatly improved so that the dynamic inhibitor has a better effect and is more stable and wider in range of application.

Description

technical field [0001] The invention belongs to the field of gas storage and transportation, in particular to an additive for inhibiting the occurrence of hydrates in the gas storage and transportation process. Background technique [0002] 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. 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. It gathers together under certain conditions and forms lumps. In severe cases, it will block equipment such as pipelines, wellbores, valves, and instruments. This poses a great threat to the production, storage and transportation of oil and gas industries, mainly in the following thre...

Claims

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Application Information

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IPC IPC(8): C09K8/524F17D1/02
Inventor 王树立马维俊周诗岽李恩田
Owner CHANGZHOU UNIV
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