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

Active Publication Date: 2021-03-26
成都西油华巍科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a shear lifting agent for oil and gas wells without solid phase completion fluid and workover fluid. In addition, the present invention also discloses a preparation method of a shear-lifting agent for a solid-free completion fluid and workover fluid for oil and gas wells

Method used

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

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Embodiment 1

[0042] This embodiment discloses a shear lifting agent for solid-free completion fluid and workover fluid for oil and gas wells. The percentage composition is 8-12% of metal salt; 28-32% of alkalinity regulator; 8-12% of flow pattern regulator; and the balance is water.

[0043] To further define, in this embodiment, the raw materials of each component are composed according to the following weight percentages, 10% of metal salt, 30% of alkalinity regulator, 10% of flow pattern regulator, and 50% of water.

[0044] Among them, the metal salt is aluminum chloride, chromium chloride, manganese chloride, manganous chloride, ferrous chloride, cupric chloride, calcium chloride, ferric chloride, magnesium chloride, manganese nitrate, aluminum nitrate, magnesium nitrate salts of any two different metals.

[0045] It should be further explained that, in actual use, the composition ratio of any two different metals in the metal salt is the same as the molecular mass ratio.

[0046] W...

Embodiment 2

[0072] This embodiment is basically similar to Embodiment 1, the difference is that according to the quality and 100% of the raw materials: 50% of water, 10% of metal salt, 30% of alkalinity regulator, 10% of flow regulator; wherein, metal salt It is composed of aluminum chloride and magnesium nitrate at a ratio of 1:1, the alkalinity regulator is sodium hydroxide, and the flow pattern regulator is polymeric alcohol. In the reaction device, add the formulated amount of water first, then add the formulated amount of metal salt, dissolve and mix evenly; slowly add the formulated amount of alkalinity regulator to ensure that the pH value is maintained at 9; after the reaction is completed, add the flow type Regulator, stirred at a constant speed for 3 hours, with a rotating speed of 500r / min; evaporated to dryness, pulverized to obtain powder.

Embodiment 3

[0074] This embodiment is basically similar to Embodiment 1, the difference is that according to the quality and 100% of the raw materials: 50% of water, 10% of metal salt, 30% of alkalinity regulator, 10% of flow regulator; wherein, metal salt It is composed of magnesium chloride and aluminum chloride at a ratio of 1:1, the alkalinity regulator is sodium hydroxide, and the flow pattern regulator is polymeric alcohol. In the reaction device, add the formulated amount of water first, then add the formulated amount of metal salt, dissolve and mix evenly; slowly add the formulated amount of alkalinity regulator to ensure that the pH value is maintained at 9.5; after the reaction is completed, add the flow type Regulator, stirred at a constant speed for 3 hours, with a rotating speed of 500r / min; evaporated to dryness, pulverized to obtain powder.

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03B01F7/00B01F7/18B01F15/00B01J19/00B01J19/18
CPCC09K8/03B01J19/18B01J19/0066B01F27/2311B01F27/90B01F35/31B01F35/3204
Inventor 宋芳徐兴华肖刚麻洪霞
Owner 成都西油华巍科技有限公司
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