A kind of acid cleaning fracturing fluid and preparation method thereof

A clean fracturing fluid and acidic technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of limited formation acidification capacity, heavy fluid mixing workload, high cost, etc., and achieve good sand-carrying performance and acidification The effect of strong ability and low cost
CN109913196BActive Publication Date: 2021-04-02HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
Publication Date
2021-04-02

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Abstract

The invention discloses an acid clean fracturing fluid and a preparation method thereof and belongs to the technical field of oil production engineering in the petroleum industry. The acid clean fracturing fluid can be obtained by using two organic acids, N,N-dimethylamino compound and halogenated alcohol as raw materials to synthesize a dimeric surfactant and then mixing and stirring the dimericsurfactant with hydrochloric acid and water according to a certain ratio. Compared with a traditional acid fracturing fluid, the acid clean fracturing fluid disclosed by the invention has the advantages that the usage of the dimeric surfactant is small (0.5-1%), the formation acidification capacity is high (the HCl concentration is 20%), the temperature resisting and shear resisting performance isgood, the sand carrying performance is good, gel breaking is easy, and there is no residue after gel breaking.
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Description

technical field

[0001] The invention relates to an acidic clean fracturing fluid and a preparation method thereof, belonging to the technical field of oil recovery engineering in the petroleum industry. Background technique

[0002] Acidic clean fracturing fluid is a fracturing fluid that can form gel under acidic conditions and can effectively carry sand and transport proppant. It is usually composed of surfactants, acid liquids (one or a mixture of several types), and a small amount of additives. . The acidic clean fracturing fluid realizes simultaneous acid etching and sand-carrying, and can form longer and multi-branched acid etching-support composite fractures in the reservoir section, improving the stimulation effect of oil and gas wells. At the same time, it eliminates the disadvantages of traditional alkaline fracturing fluids reacting with rock formations to form insoluble sediments and scaling on the surface of construction equipment.

[0003] At present, there a...

Claims

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