Shear strength improving agent for solid-free completion fluid workover fluid for oil-gas well and preparation method thereof

A solid phase-free and completion fluid technology, applied in chemical instruments and methods, chemical/physical/physicochemical fixed reactors, mixers, etc., can solve problems such as poor suspension and sand-carrying of workover fluids, and prevent The effect of the sand settling accident
CN112552883AActive Publication Date: 2021-03-26成都西油华巍科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
成都西油华巍科技有限公司
Publication Date
2021-03-26

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Abstract

The invention discloses a shear strength improving agent for solid-free completion fluid workover fluid for an oil-gas well. The shear strength improving agent comprises the following raw materials inpercentage by weight: 8-12% of metal salt; 28-32% of an alkalinity regulator; 8-12% of a flow pattern regulator; and the balance of water. In addition, the invention further discloses a preparation method of the shear strength improving agent for the solid-free completion fluid workover fluid for the oil-gas well, and the preparation method comprises the following steps: step 1, adding a formulaamount of water into a reaction device, then adding a formula amount of metal salt, and stirring by using a stirring device to quickly dissolve and uniformly mix the metal salt; step 2, slowly addingthe mixture into a formula amount of alkalinity regulator, and regulating the pH value to be 9-10; step 3, after the reaction is completed, adding a flow pattern regulator for stirring; and step 4, evaporating the solvent, and crushing the solvent to obtain powder. The shear strength improving agent can solve the technical problem that solid-phase composite brine completion fluid and workover fluid are poor in suspension and sand carrying.
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Description

technical field

[0001] The invention relates to the technical field of additives for oil field completion fluids and workover fluids, in particular to a shear-lifting agent for oil and gas wells with solid-free completion fluids and workover fluids; in addition, the invention also relates to an oil and gas well without The invention discloses a preparation method of a shear-lifting agent for a solid-phase well completion fluid and a workover fluid. Background technique

[0002] The purpose of oil and gas well completion is to maximize the communication channels between formations, so as to ensure the highest production rate and recovery rate of oil and gas wells. In a broad sense, any liquid used to contact the production layer due to operational needs is called completion fluid. In the specific production process, the foreign liquid used to contact oil and gas layers before oil testing is called completion fluid, such as drilling (oil and gas layer) fluid, perforating flui...

Claims

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