Preparation method of multiple-effect compound type corrosion and scale inhibitor

Abstract

The invention discloses a preparation method of a multiple-effect compound type corrosion and scale inhibitor. The preparation method is characterized in that the scale inhibitor is of a compound type and comprises the following components in percent by volume: 22%-32% of polyepoxysuccinic acid, 10%-18% of ethylenediamine tetramethylene phosphonic acid, 35%-50% of itaconic acid-maleic acid-crylic acid-methyl acrylate polymer, 10%-18% of tree-shaped polyamide-amine, and the balance of water, and sodium hydroxide is used for adjusting the pH. The invention also discloses the multiple-effect compound type corrosion and scale inhibitor which has an excellent scale inhibiting effect on BaSO4, SrSO4, CaCO3, MgCO3, SiO2 and Ca3(PO4)2, also has the characteristics of corrosion inhibiting performance, high temperature resistance, good stability and the like, and have no three-waste emission in the whole production process. The preparation method for treating complex water quality disclosed by the invention has the advantages of simple scale inhibiting process, low agent using amount, low cost and good effect, and has better economic benefit and wide social benefit.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and specifically relates to a preparation method of a barium-strontium composite corrosion and scale inhibitor, which belongs to a phosphorus-free, biodegradable, green and environment-friendly corrosion and scale inhibitor, and is used for corrosion and scale inhibition of water quality deal with. Background technique [0002] In recent years, the rapid economic development has led to a rapid increase in the demand for oil and gas. However, most of the oil and gas fields today have entered the middle and late stages, and oil field scaling has become a major problem that plagues the production of oil and gas fields. Oil and gas field water scaling has two notable features: (1) high calcium content, the content of bicarbonate and calcium ions in petroleum wastewater is usually more than five times the calcium content in cooling circulating water, so it is easy to produce a large amo...

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Problems solved by technology

At present, the scale inhibitors commonly used in domestic oil fields mainly include organic phosphates, polymers, and composites of organic phosphates and polycarboxylates. , The application number is 200610012917.9 "Biodegradable composite corrosion and scale inhibitors and its preparation method", most of these scale inhibitors have better scale inhibition effect on calcium, but relatively poor scale inhibition effect on barium strontium. At present, for barium strontium strontium There are polymers and composites, such as: application number 200910198929.9 "a water quality scale inhibitor containing barium and strontium", application number 201010144967.9 "a scale inhibitor for preventing barium and strontium scale deposition", application number 200810227273.4 "a barium and strontium scale inhibitors”, however, the existing scale inhibitors generally have a narrow scope of application and weak scale inhibition ability, and due to the complexity and variability of oilfield water quality, the scale inhibition performance of a single scale inhibitor It is far from meeting the requirements of oilfield water treatment. It is necessary to use multiple polymers and several antiscalants to compound and introduce more antiscalants containing different active groups into the composite antiscalant to endow the water treatment agent with more new functions. excellent performance

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