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Biological enzyme composite blocking remover and preparation method thereof

A technology of compound plug removing agent and biological enzyme, applied in chemical instruments and methods, drilling composition, etc., can solve the problems of limited pH value application range, reduced permeability, low-efficiency and high-efficiency development, etc.

Active Publication Date: 2021-05-11
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In 2019, Duan Hao invented a bio-enzyme plug-removing agent product suitable for oil and gas fields, which is mainly composed of mannanase, cellulase, xanthan gum lyase and lipase. The plugging agent needs to be used with a pH regulator, and the scope of application of the pH value is limited
[0004] Therefore, a new type of high-efficiency bio-enzyme composite plugging agent is needed, which can solve technical problems such as low permeability, medium and low permeability reservoir reformation residual glue, and organic matter (wax, asphaltene, etc.) clogging in the later stage of development. , to provide technical support for efficient development of low-efficiency wells

Method used

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  • Biological enzyme composite blocking remover and preparation method thereof

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Effect test

Embodiment 1

[0082] The preparation method of the bio-enzyme composite plug-removing agent provided in this embodiment:

[0083] S1. Preparation of biological surfactant. In a beaker, add rhamnolipid, sophorolipid and N-acetylgalactosamine in a mass ratio of 2:1:1, and stir evenly.

[0084] S2, preparing a biological enzyme stabilizer. In a beaker, add disodium edetate, citric acid, and triethanolamine in a mass ratio of 2:0.5:0.3, and stir evenly.

[0085] S3, preparing biological enzyme. In a beaker, add xylanase, cellulase, mannanase, amylase and xanthan gum lyase in a mass ratio of 4:2:3:1:1, and stir evenly.

[0086] S4. Add 90.8 parts of water into the beaker, then sequentially add 3 parts of biological surfactant, 6 parts of biological enzyme stabilizer, and 0.2 part of biological enzyme, and stir evenly to obtain a biological enzyme composite plugging remover.

Embodiment 2

[0088] The preparation method of the bio-enzyme composite plug-removing agent provided in this embodiment:

[0089] S1. Preparation of biological surfactant. In a beaker, add rhamnolipid, sophorolipid and N-acetylgalactosamine in a mass ratio of 2:1:1, and stir evenly.

[0090] S2, preparing a biological enzyme stabilizer. In a beaker, add disodium edetate, citric acid, and triethanolamine in a mass ratio of 1.5:1:0.3, and stir evenly.

[0091] S3, preparing biological enzyme. In a beaker, add xylanase, lipase, mannanase, protein compound enzyme and amylase in a mass ratio of 3:2:2:1:1, and stir evenly.

[0092] S4. Add 88.7 parts of water into the beaker, then sequentially add 3 parts of biological surfactant, 8 parts of biological enzyme stabilizer, and 0.3 part of biological enzyme, and stir evenly to obtain a biological enzyme composite plugging remover.

Embodiment 3

[0094] The preparation method of the bio-enzyme composite plug-removing agent provided in this embodiment:

[0095] S1. Preparation of biological surfactant. In a beaker, add rhamnolipid and N-acetylgalactosamine in a mass ratio of 1:1, and stir evenly.

[0096] S2, preparing a biological enzyme stabilizer. In a beaker, add disodium edetate, citric acid, and triethanolamine in a mass ratio of 1:1:0.2, and stir evenly.

[0097] S3, preparing biological enzyme. In a beaker, add xylanase, mannanase, protein complex enzyme and xanthan gum lyase in a mass ratio of 1:2:0.2:0.5, and stir evenly.

[0098] S4. Add 86.7 parts of water into the beaker, then sequentially add 5 parts of biological surfactant, 8 parts of biological enzyme stabilizer, and 0.3 part of biological enzyme, and stir evenly to obtain a biological enzyme composite plugging remover.

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Abstract

The invention relates to a biological enzyme composite blocking remover and a preparation method thereof, which belong to the technical field of oil field yield increase renovation. The blocking remover comprises the following components by mass: 0.1-0.5% of biological enzyme, 3-5% of a biological surfactant, 5-10% of a biological enzyme stabilizer, and the balance of water; the biological enzyme comprises at least one of xylanase, lipase, cellulase, mannase, protein complex enzyme, amylase and xanthan gum lyase; the biological surfactant is prepared from at least one of the following components: the biological surfactant is mainly prepared from rhamnolipid, sophorolipid and N-acetylgalactosamine; and the biological enzyme stabilizer comprises at least one of the following components: disodium ethylene diamine tetraacetate, citric acid and triethanolamine. The biological enzyme composite blocking remover provided by the invention can solve the problems of permeability reduction and the like caused by low-permeability and medium-low-permeability reservoir reconstruction residual gum and organic matter (wax, asphaltene and the like) blocking in the later development period.

Description

technical field [0001] The invention belongs to the technical field of oilfield production enhancement and modification, and in particular relates to a biological enzyme compound plugging remover and a preparation method thereof. Background technique [0002] Biological enzyme is a kind of inactive catalyst based on protein, which is developed by modern biochemical technology such as modern genetic engineering, cell engineering and enzyme engineering, and has the advantages of rapidity, high efficiency and environmental protection. With the development of oilfield chemical technology, the combination of oilfield chemical agents and environmentally friendly biological agents has been continuously improved. The biological enzyme plugging agent with obvious environmental protection characteristics and high efficiency has been applied to oil and water wells in major oilfields in my country due to its various advantages. Plugging removal and transformation, such as Daqing, Shengli...

Claims

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Application Information

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IPC IPC(8): C09K8/524
CPCC09K8/524
Inventor 徐鸿志郝志伟张鹏远王天驹王蕊张硕赵文娜刘小攀段小壮刘兆然
Owner BC P INC CHINA NAT PETROLEUM CORP
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