Barium sulfate and strontium sulfate descaling agent and preparation method thereof

A technology of descaling agent and strontium sulfate, which is applied in the direction of corrosion/scaling inhibition of treatment equipment, petroleum industry, treatment of hydrocarbon oil, etc., can solve problems such as poor effect, achieve the effect of improving descaling performance and increasing the ability of dissolving scale
CN103820150AInactive Publication Date: 2014-05-28XI'AN PETROLEUM UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
XI'AN PETROLEUM UNIVERSITY
Publication Date
2014-05-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a barium sulfate and strontium sulfate descaling agent and a preparation method thereof. According to the invention, a proper water soluble solvent is added into a formula which takes nitrogenous polybasic carboxylic acid as a main component, so that the components are better matched in function, and the descaling performance of the final product is further improved. In addition, the cost of the solvent is lower than that of other components, so that the cost of the final product is lowered. Raw materials for producing the descaling agent can be purchased from chemical engineering markets at home and abroad, the synthetic process is simple and the product quality is stable. The barium sulfate and strontium sulfate descaling agent for oil prepared by the invention can be suitable for water injection stratums, perforation wells, sleeve orifices, underground pumps, tubing strings, valves, transmission pipelines and the like. The descaling agent is good in compatibility and is an ideal descaling agent for removing barium sulfate and strontium sulfate for an oil field.
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Description

technical field

[0001] The invention relates to a descaling agent and a preparation method thereof, in particular to a barium sulfate and strontium sulfate descaling agent for oil fields and a preparation method thereof. Background technique:

[0002] With the massive consumption of oil and the increasing development of oil field exploitation, most oil fields have entered the stage of water flooding oil production. However, the injected water as a formation is rich in sulfate ions, while in some oilfield formations it is rich in barium and strontium ions. Due to the chemical incompatibility between the two, water injection formations, oil casings, downhole, ground equipment and gathering and transportation Lines are fouled. Barium sulfate and strontium scale have strong stability, small solubility product, compact structure, high hardness, insoluble in acid and alkali, and are difficult to remove by traditional methods. Therefore, barium sulfate and strontium scale removers...

Claims

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