Scale inhibitor composition, scale inhibitor and preparation method of scale inhibitor

A technology of antiscalant and composition, which is applied in the field of oil field development, can solve the problems of unfriendly environment and unstable performance of antiscalant, and achieve the effect of good compatibility, reliable and stable performance, and alleviating scaling phenomenon

Inactive Publication Date: 2020-06-02
PETROCHINA CO LTD
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Problems solved by technology

[0018] The main purpose of the present invention is to provide a scale inhibitor composition, a scale inhibitor and a preparation method of the scale inh...

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  • Scale inhibitor composition, scale inhibitor and preparation method of scale inhibitor
  • Scale inhibitor composition, scale inhibitor and preparation method of scale inhibitor
  • Scale inhibitor composition, scale inhibitor and preparation method of scale inhibitor

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preparation example Construction

[0041] In order to make the components in the antiscalant composition fully function, preferably, the above preparation method includes: step S1: mixing aliphatic unsaturated acid anhydride, aliphatic unsaturated acid and unsaturated sulfonic acid to obtain the first mixture; Step S2: polymerize the first mixture under the action of an initiator to obtain a scale inhibitor. Before the initiator is added, the aliphatic unsaturated acid anhydride, aliphatic unsaturated acid and unsaturated sulfonic acid are mixed with each other evenly under stirring. The polymerization reaction with unsaturated sulfonic acid substances begins, that is, the unsaturated bonds react to form polymers with anhydride groups, carboxylic acid groups and sulfonic acid groups. By mixing the substances according to the above method, the polymerization reaction can be carried out after the reaction raw materials are fully mixed, and the reaction can be carried out more effectively.

[0042] In a preferred...

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Abstract

The invention provides a scale inhibitor composition, a scale inhibitor and a preparation method of the scale inhibitor. The scale inhibitor composition comprises aliphatic unsaturated acid anhydride,aliphatic unsaturated acid and a unsaturated sulfonic acid substance, wherein a molar ratio of the aliphatic unsaturated acid anhydride to the aliphatic unsaturated acid to the unsaturated sulfonic acid substance is 1:1:1 to 1:0.1:0.1. According to the invention, the scale inhibitor prepared from the scale inhibitor composition can effectively inhibit the formation of calcium carbonate, calcium sulfate, barium sulfate, silicate and other water scales, has good dispersity and certain zinc stability, greatly relieves the scaling phenomenon in an oil-gas development process, and saves the development cost; and the scale inhibitor provided by the invention does not contain phosphorus, can greatly reduce the emission of phosphorus, has good compatibility with HEDP, ATMP, EDTMP and other phosphorus scale inhibitors, and has the advantages of uncomplicated synthesis process and reliable and stable performance.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a scale inhibitor composition, a scale inhibitor and a preparation method of the scale inhibitor. Background technique [0002] In the process of oilfield development, scaling will inevitably occur in oil and gas wellbores, surface gathering and transportation systems, water injection formations, etc., which will not only block pipelines and reduce heat transfer efficiency, but may also cause serious under-scaling corrosion, which is harmful to oil and gas development. bring many security risks. Scaling problem has always been accompanied by oil field exploitation, and whether it is primary oil recovery, secondary oil recovery or tertiary oil recovery, the scale layer will seriously block the surface pipeline, and some oil wells may even cause the liquid production rate of oil field production to drop due to scaling. The common scale layer is mainly composed of calc...

Claims

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Application Information

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IPC IPC(8): C02F5/12C02F101/10
CPCC02F5/12C02F2101/10C02F2101/101C02F2303/22
Inventor 易勇刚石善志田刚刘从平于会永曾德智同航陈禹欣孙宜成王亮王丽荣何利
Owner PETROCHINA CO LTD
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