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High-temperature oil-soluble temporary plugging agent and preparation method thereof

A technology of temporary plugging agent and high temperature oil, applied in chemical instruments and methods, drilling composition and other directions, can solve problems such as high temperature resistance, achieve the effect of protecting high temperature oil layer, solving high temperature resistance and good oil solubility

Inactive Publication Date: 2015-03-04
TIANJIN DAGANG OILFIELD BINGANG GRP BOHONG PETROLEUM CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-temperature oil-soluble temporary plugging agent and its preparation method to solve the shortcomings of traditional oil-soluble temporary plugging agents that are not resistant to high temperatures

Method used

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  • High-temperature oil-soluble temporary plugging agent and preparation method thereof
  • High-temperature oil-soluble temporary plugging agent and preparation method thereof
  • High-temperature oil-soluble temporary plugging agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Select raw materials by weight percentage

[0026] Asphalt: 30%

[0027] C9 petroleum resin: 30%

[0028] Coumarone resin: 25%

[0029] Surfactant: 5%%

[0030] Polymer fiber: 2%%

[0031] Softening point additive: 8%.

[0032] Wherein, the above-mentioned surfactant is polyoxyethyl alkylphenyl ether, the polymer fiber is polyvinyl alcohol fiber, and the softening point additive is cationic starch.

[0033] The preparation method is as follows:

[0034] (1) Put the asphalt into the reaction kettle, heat and melt it, add a certain quality of C9 petroleum resin and coumarone resin, and continue to stir until it is completely melted;

[0035] (2) Add a certain quality of surfactants, polymer fibers, and softening point additives into the reaction kettle, stir for 30 minutes, mix well, stop heating, collect the particles after cooling, wash with water, and sieve to obtain oils with different particle sizes Soluble temporary plugging agent.

[0036] Determination of ...

Embodiment 2

[0051] Select raw materials by weight percentage

[0052] Bitumen: 20%

[0053] C9 petroleum resin: 30%

[0054] Coumarone resin: 30%

[0055] Surfactant: 10%

[0056] Polymer fiber: 5%

[0057] Softening point additive: 5%.

[0058] Wherein, the above-mentioned surfactant is dodecyltrimethylammonium chloride, the polymer fiber is polyurethane fiber, and the softening point additive is lignite.

[0059] The preparation method is as follows:

[0060] (1) Put the asphalt into the reaction kettle, heat and melt it, add a certain quality of C9 petroleum resin and coumarone resin, and continue to stir until it is completely melted;

[0061] (2) Add a certain quality of surfactants, polymer fibers, and softening point additives into the reaction kettle, stir for 30 minutes, mix well, stop heating, collect the particles after cooling, wash with water, and sieve to obtain oils with different particle sizes Soluble temporary plugging agent.

[0062] Determination of oil solubil...

Embodiment 3

[0077] Select raw materials by weight percentage

[0078] Bitumen: 20%

[0079] C9 petroleum resin: 20%

[0080] Coumarone resin: 50%

[0081] Surfactant: 5%

[0082] Polymer fiber: 2%

[0083] Softening point additive: 3%.

[0084] Wherein, the above-mentioned surfactant is polyoxyethyl alkyl ether, the polymer fiber is modified polyester fiber, and the softening point additive is lignite.

[0085] The preparation method is as follows:

[0086] (1) Put the asphalt into the reaction kettle, heat and melt it, add a certain quality of C9 petroleum resin and coumarone resin, and continue to stir until it is completely melted;

[0087] (2) Add a certain quality of surfactants, polymer fibers, and softening point additives into the reaction kettle, stir for 30 minutes, mix well, stop heating, collect the particles after cooling, wash with water, and sieve to obtain oils with different particle sizes Soluble temporary plugging agent.

[0088] A core simulation test was carri...

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Abstract

The invention relates to a high-temperature oil-soluble temporary blocking agent. The high-temperature oil-soluble temporary blocking agent is characterized by comprising the following components in percent by weight: 10-40% of asphalt, 20-50% of C9 petroleum resin, 15-50% of coumarone resin, 5-15% of a surfactant, 2-15% of a polymer fiber and 1-10% of a softening-point additive. The preparation procedures of the high-temperature oil-soluble temporary blocking agent are as follows: firstly, adding the asphalt into a reactor, heating to melt the asphalt, adding the C9 petroleum resin and the coumarone resin into the reactor, stirring continuously until the substances in the reactor are fully melted, continuously adding the surfactant, the polymer fiber and the softening-point additive into the reactor, stirring for 30 minutes to mix uniformly, stopping heating a mixture, cooling, then collecting particles, washing, and screening to obtain the high-temperature oil-soluble temporary blocking agent with different particle sizes. The high-temperature oil-soluble temporary blocking agent provided by the invention overcomes the defect that the traditional oil-soluble temporary blocking agent can not resist high temperature. The high-temperature oil-soluble temporary blocking agent has good oil solubility, acid and salt resistance and high-temperature degradation resistance. The added softening-point additive is capable of regulating the range of the softening point, and thus an oil layer can be protected.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and in particular relates to a high-temperature oil-soluble temporary plugging agent and a preparation method thereof. Background technique [0002] In the process of petroleum development, from drilling oil and gas layers to well completion, well cementing, perforation, acidizing, fracturing, workover, well washing and other links, the oil and gas layers are damaged or polluted to varying degrees. The main reason for the damage to oil and gas layers caused by fluid entering the well is due to the invasion of solid particles and foreign liquids, which cause formation clay hydration expansion, particle migration and chemical precipitation, etc., thereby blocking the oil flow channel and reducing the permeability of the oil layer around the wellbore , reducing the production capacity of the reservoir. Temporary plugging technology is the main measure to protect production layers from pollutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/514
CPCC09K8/514C09K2208/18
Inventor 胡玉国梁海臣李靖张冠洲张有强张凤跃肖劲松孙红桃李东
Owner TIANJIN DAGANG OILFIELD BINGANG GRP BOHONG PETROLEUM CHEM
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