Composite inhibitor of natural gas hydrate and application of composite inhibitor

A compound inhibitor and hydrate technology, which is applied in the direction of drilling composition, gas/liquid distribution and storage, pipeline system, etc., can solve the problems that cannot be effectively suppressed, and achieve saving operation time, fast pumping speed, and convenient The effect of flowback

Inactive Publication Date: 2017-01-04
北京千永科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the defects in the prior art that the formation of hydrates in natural gas cannot be effectively suppressed only by using thermodynamic inhibitors, the present invention provides a composite inhibitor of natural gas hydrates

Method used

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  • Composite inhibitor of natural gas hydrate and application of composite inhibitor
  • Composite inhibitor of natural gas hydrate and application of composite inhibitor
  • Composite inhibitor of natural gas hydrate and application of composite inhibitor

Examples

Experimental program
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Effect test

Embodiment 1

[0037] This embodiment relates to a composite inhibitor of natural gas hydrate, which includes the following substances in parts by weight.

[0038] Kinetic inhibitor 1 ton, thermodynamic inhibitor 10 tons, antipolymerization agent 0.8 tons, matrix 88.2 tons;

[0039] The kinetic inhibitor is a terpolymer of N-vinylcaprolactam, vinylpyrrolidone, and maleic anhydride. The polymer is provided by Jilin Qianyong Petroleum Engineering Technology Co., Ltd., and the product name is polyethylene Lactam QY-32, this product complies with the enterprise standard "Natural Gas Hydrate Inhibitor Polyvinyl Caprolactam QY-32", the standard number is Q / JSYQY0019-2015, the standard is filed in Songyuan Quality and Technical Supervision Bureau, and the record number is QB / 220700G089; the thermodynamic inhibitor is a mixture of sodium chloride and ethylene glycol in a molar ratio of 1:1; the antipolymerization agent is Span-80; the base is water.

Embodiment 2

[0041] This embodiment relates to a composite inhibitor of natural gas hydrate, which includes the following substances in parts by weight.

[0042] 1.5 tons of kinetic inhibitors, 0 tons of thermodynamic inhibitors, 0.7 tons of antipolymerization agents, and 97.8 tons of substrates.

[0043] The kinetic inhibitor is the same polyvinyl caprolactam QY-32 as in Example 1; the thermodynamic inhibitor is a mixture of sodium chloride and ethylene glycol in a molar ratio of 1:1; the antipolymerization agent is Span -60; the matrix is ​​mud.

Embodiment 3

[0045] This embodiment relates to a composite inhibitor of natural gas hydrate, which includes the following substances in parts by weight.

[0046] 1.5 tons of kinetic inhibitors, 10 tons of thermodynamic inhibitors, 1 ton of antipolymerization agent, and 87.5 tons of substrates.

[0047] The kinetic inhibitor is the same polyvinyl caprolactam QY-32 as in Example 1, and the thermodynamic inhibitor is a mixture of sodium chloride and ethylene glycol in a molar ratio of 1:1; the antipolymerization agent is dehydration Behenyl alcohol fatty acid Tween-60; the base is water.

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Abstract

The invention relates to a composite inhibitor of natural gas hydrate. The composite inhibitor is prepared from 0.5 to 2 parts of a kinetic inhibitor, 0 to 15 parts of a thermodynamic inhibitor, 0.5 to 1.5 parts of an anti-agglomeration agent and 81.5 to 99 parts of a matrix. The inhibitor provided by the invention is used in a compounding manner, small in adding amount and good in economical efficiency; temperature and pressure of generating the hydrate can be effectively reduced; in a utilization process, the composite inhibitor is convenient to prepare on site, a pumping speed is repid and precious working time is saved; the inhibitor has relatively low surface tension and rapid backflow of residual liquid after working is finished is convenient to realize; the inhibitor can be matched with an anti-swelling agent and the aim of stabilizing a stratum is realized; the inhibitor can also be matched with quick water, so that the inhibitor has dual effect and does not need to work independently, and a lot of human and material resources can be saved.

Description

technical field [0001] The invention relates to the field of suppression of natural gas hydrate, in particular to a composite inhibitor of natural gas hydrate. Background technique [0002] Natural gas is currently the most ideal, practical, and promising emerging energy source. Since natural gas hydrates that blocked pipelines were discovered in natural gas pipeline transportation in 1934, how to inhibit the formation of hydrates has become an important issue to be solved in the production of oil and gas wells. question. These hydrates can block wellbores, pipelines, valves and equipment, seriously affecting the normal operation of natural gas extraction, gathering, transportation and processing. Especially in recent years, the drilling and exploitation of oil and gas have shifted from land to sea, and gradually to deep water, while the deep water operation environment in the sea is even harsher and the operating conditions are complicated. One of the frequently encountere...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524C09K8/03C09K8/68F17D1/16
CPCC09K8/524C09K8/03C09K8/685C09K2208/22F17D1/16
Inventor 原玉红王毓才许建国贺君玲段永伟郝春成龙增伟王海英牛权宇
Owner 北京千永科技股份有限公司
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