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A kind of high temperature resistant petroleum resin dispersion plugging agent and its preparation method and application

A petroleum resin and dispersion technology, applied in chemical instruments and methods, mining fluids, earth drilling and mining, etc., can solve problems such as environmental pollution, serious human injury, blockage near wells, etc., and achieve temperature resistance and salt resistance Excellent, good dispersion stability, and the effect of improving high temperature resistance

Active Publication Date: 2020-09-22
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The profile control agent of this invention can be used for a long time at a temperature of 200°C and a salinity of more than 20,000 mg / L, but it is unknown whether the profile control agent can be used at a higher salinity. Anionic polypropylene The amide gelation time is fast, the overall stability of the profile control agent emulsion is not good, it is easy to cause blockage near the wellbore, and there are defects of polyacrylamide high-temperature gel plugging agents; and xylene in the raw materials used is a toxic substance that pollutes the environment. Long-term exposure is also very harmful to the human body, and it is a controlled drug in oil fields

Method used

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  • A kind of high temperature resistant petroleum resin dispersion plugging agent and its preparation method and application
  • A kind of high temperature resistant petroleum resin dispersion plugging agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A high-temperature-resistant petroleum resin dispersion plugging agent, made of the following percentages of raw materials: C9 petroleum resin 10%, octadecyl dimethyl ammonium oxide 0.2%, cationic polyacrylamide 0.1%, triethanolamine 0.2%, sub 0.2% of sodium bisulfate, 1.1% of silicon dioxide nanoparticles, 0.3% of sodium hydroxide, and the balance is water; the sum of the mass percentages of each raw material is 100%.

[0034] The preparation method of the above-mentioned high temperature resistant petroleum resin dispersion plugging agent comprises steps:

[0035] The mineralization degree is 22.3×10 to 25g 4 Add 0.2g octadecyl dimethyl ammonium oxide to the formation water of mg / L, fully dissolve and stir evenly, slowly add 10g petroleum resin powder (the addition process is controlled within 5-10min), fully stir and disperse evenly to obtain the mixed solution A; 13g mineralization is 22.3×10 4 Add 0.2g sodium bisulfite and 0.2g triethanolamine to the formation wa...

Embodiment 2

[0038] A high-temperature-resistant petroleum resin dispersion plugging agent, made of the following percentages of raw materials: C9 petroleum resin 10%, octadecyl dimethyl ammonium oxide 0.25%, cationic polyacrylamide 0.1%, triethanolamine 0.2%, sub 0.2% of sodium bisulfate, 1.1% of silicon dioxide nanoparticles, 0.3% of sodium hydroxide, and the balance is water; the sum of the mass percentages of each raw material is 100%.

[0039] The preparation method of the above-mentioned high-temperature-resistant petroleum resin dispersion plugging agent is consistent with Example 1, except that the amount of surfactant octadecyl dimethyl ammonium oxide is 0.25g, and other steps and conditions are the same as those in Example 1. same.

[0040] Simulate the oil well conditions of high-temperature reservoirs: Stir the above-mentioned petroleum resin dispersion plugging agent at 90°C for 5 hours to obtain the plugging agent after high-temperature treatment. In the plugging agent, cati...

Embodiment 3

[0042] A high-temperature-resistant petroleum resin dispersion plugging agent, made of the following percentages of raw materials: C9 petroleum resin 10%, octadecyl dimethyl ammonium oxide 0.3%, cationic polyacrylamide 0.1%, triethanolamine 0.2%, sub 0.2% of sodium bisulfate, 1.1% of silicon dioxide nanoparticles, 0.3% of sodium hydroxide, and the balance is water; the sum of the mass percentages of each raw material is 100%.

[0043] The preparation method of the above-mentioned high-temperature-resistant petroleum resin dispersion plugging agent is consistent with Example 1, except that the amount of surfactant octadecyl dimethyl ammonium oxide is 0.3g, and other steps and conditions are the same as those in Example 1. same.

[0044] Simulate the oil well conditions of high-temperature reservoirs: Stir the above-mentioned petroleum resin dispersion plugging agent at 90°C for 5 hours to obtain the plugging agent after high-temperature treatment. In the plugging agent, cation...

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Abstract

The invention provides a high-temperature-resistant petroleum resin dispersion plugging agent and a preparation method and application thereof. The high-temperature-resistant petroleum resin dispersion plugging agent is prepared by, by mass percentage, 5-15% of petroleum resin, 0.1-0.5% of surfactant, 0.05-0.4% of cationic polyacrylamide, 0.1-0.4% of triethanolamine, 0.1-0.5% of sodium hydrogen sulfite, 1-3% of silicon dioxide nano-particles, 0.1-0.5% of pH regulator and the balance water, wherein the total mass percentage of materials above is 100%. After the plugging agent is injected into astratum, the cationic polyacrylamide in the plugging agent has modification reaction under the high temperature of the stratum to obtain sulfonic group modified cationic polyacrylamide, the high-temperature resistance, salt resistance and stability of the petroleum resin dispersion plugging agent can be increased effectively, and accordingly petroleum resin can smoothly reach the deep position ofan oil reservoir oil well to achieve effective high-temperature water plugging.

Description

technical field [0001] The invention relates to a high-temperature-resistant petroleum resin dispersion plugging agent and a preparation method and application thereof, belonging to the technical field of oil field chemistry. Background technique [0002] Oil well water production is an important phenomenon in the process of oil production in oil fields. The reasons for oil well water production are generally: (1) injection water and edge water advance; (2) bottom water advance; (3) upper and lower water intrusion; (4) ) interlayer water enters, and interlayer water refers to the interlayer water between oil layers, that is, the water layer between the upper and lower oil layers. There are many harms caused by oil well water, such as: (1) oil well produces sand, which damages the loosely cemented sandstone layer, resulting in sand production, and in severe cases, the oil layer collapses or the oil well stops production; As the amount of water continues to increase, the weig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/514C09K8/508E21B33/13E21B43/22
CPCC09K8/5086C09K8/514E21B33/13E21B43/16
Inventor 蒋平郑超葛际江张贵才赵军梅裴海华孙铭勤
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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