Clean temporary plugging agent and preparation method thereof

A temporary plugging agent and cleaning technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of long dissolution time, poor compression resistance, high solid phase content, etc., and achieve simple use and high insoluble residue rate The effect of low and low dosage

Inactive Publication Date: 2018-09-04
四川申和新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temporary plugging agent described in "A Temporary Plugging Agent and Its Preparation Method" is not suitable for the exploitation of unconventional oil and gas resources. It is a temporary plugging agent for heavy oil production. high

Method used

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  • Clean temporary plugging agent and preparation method thereof
  • Clean temporary plugging agent and preparation method thereof
  • Clean temporary plugging agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The purpose of this embodiment is to provide a cleaning temporary plugging agent, the preparation process of which is as follows:

[0031] (1) Dissolve acrylamide in water. In order to speed up the dissolution rate, heat up to 45-50°C. After complete dissolution, cool to room temperature, then add caustic soda and stir to dissolve to obtain intermediate solution 1.

[0032] (2) Heat the solution obtained in step (1) to 35-40°C, slowly add acrylic acid under stirring conditions, and after mixing completely, slowly add initiator ammonium persulfate under stirring conditions, and fully React for 50 minutes, cool to room temperature, then adjust the pH to 1-2 with a small amount of concentrated sulfuric acid, and let stand to obtain intermediate liquid 2.

[0033] (3) Heat the epoxy resin of the low-temperature-resistant glue to above 70°C to melt it completely to obtain the intermediate liquid 3.

[0034] (4) Quickly pour the intermediate liquid 3 into the intermediate li...

Embodiment 2

[0039] The purpose of this embodiment is to provide a cleaning temporary plugging agent, the preparation process of which is as follows:

[0040] (1) Dissolve acrylamide in water. In order to speed up the dissolution rate, heat up to 45-50°C. After complete dissolution, cool to room temperature, then add caustic soda and stir to dissolve to obtain intermediate solution 1.

[0041] (2) Heat the solution obtained in step (1) to 35-40°C, slowly add acrylic acid under stirring conditions, and after mixing completely, slowly add initiator ammonium persulfate under stirring conditions, and fully React for 50 minutes, cool to room temperature, then adjust the pH to 1-2 with a small amount of concentrated sulfuric acid, and let stand to obtain intermediate liquid 2.

[0042] (3) Heat the epoxy resin of the low-temperature-resistant glue to above 70°C to melt it completely to obtain the intermediate liquid 3.

[0043] (4) Quickly pour the intermediate liquid 3 into the intermediate li...

Embodiment 3

[0048] The purpose of this embodiment is to provide a cleaning temporary plugging agent, the preparation process of which is as follows:

[0049] (1) Dissolve acrylamide in water. In order to speed up the dissolution rate, heat up to 45-50°C. After complete dissolution, cool to room temperature, then add caustic soda and stir to dissolve to obtain intermediate solution 1.

[0050] (2) Heat the solution obtained in step (1) to 35-40°C, slowly add acrylic acid under stirring conditions, and after mixing completely, slowly add initiator ammonium persulfate under stirring conditions, and fully React for 50 minutes, cool to room temperature, then adjust the pH to 1-2 with a small amount of concentrated sulfuric acid, and let stand to obtain intermediate liquid 2.

[0051] (3) Heat the epoxy resin of the low-temperature-resistant glue to above 70°C to melt it completely to obtain the intermediate liquid 3.

[0052] (4) Quickly pour the intermediate liquid 3 into the intermediate li...

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Abstract

The invention belongs to petroleum natural gas technology yield increase, and discloses a clean temporary plugging agent. The clean temporary plugging agent is prepared from the following raw materials in parts by mass: 10 to 13 percent of acrylamide, 10 to 13 percent of acrylic acid, 0.3 to 0.5 percent of caustic soda flakes, 0.08 to 0.1 percent of initiators, 7 to 9 percent of low-temperature-resistant glue epoxy resin, 0.5 to 0.8 percent of surfactants and the balance of water. The invention also provides a preparation method of the clean temporary plugging agent. The clean temporary plugging agent has the advantages that the clean temporary plugging agent does not contain inorganic solid phase particles; the damage of the temporary plugging agent to the stratum after the dissolution isreduced; the preparation method of the clean temporary plugging agent is simple and safe; the high-temperature-resistant and salt-resistant capability are realized; great construction pressure can beborne; the high-temperature resistance can be realized; the insoluble residue content is very low; the dissolution speed is controllable; the consumption is low; the use is simple.

Description

technical field [0001] The invention belongs to the technical field of increasing production of oil and natural gas technology, and in particular relates to a cleaning temporary plugging agent and a preparation method thereof. Background technique [0002] At present, temporary plugging agents for oil and gas fields mainly include water-soluble temporary plugging agents and fiber temporary plugging agents, most of which are used in a single type. The most similar to this patent are "composite temporary plugging agent and temporary plugging method for repeated fracturing of horizontal wells" (Chinese invention patent application publication number CN107245330A) and "a temporary plugging agent and its preparation method" (Chinese invention patent application Publication number CN107288574A), "composite temporary plugging agent and temporary plugging method for repeated fracturing of horizontal wells" is a composite temporary plugging agent, wherein a polymer is polymethyl fibe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/508
CPCC09K8/5083C09K8/5086
Inventor 屈川王愉唐易汉
Owner 四川申和新材料科技有限公司
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