Water dispersible profile control agent for oil extraction and preparation method thereof

A dispersive, profile-modifying agent technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems affecting the development effect of reservoir water flooding, unable to meet the needs of reservoir development, and intensified heterogeneity , to achieve the effects of reduced dosing time, good biological stability, and low initial viscosity

Inactive Publication Date: 2014-12-10
大庆高新区华龙祥化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After entering the 21st century, oilfields generally have high water cut, the original heterogeneity of the reservoir and the long-term water drive heterogeneity are further intensified, and high permeability channels or large pores are gradually formed in the oil layer, which makes the formation pressure field and streamline field form a fixed potential, The water flow dominant channel formed between the oil and water wells caused the “short circuit” of water flooding, which seriously affected the water flooding development effect of the reservoir. In addition, due to the limitation of understanding of the status quo of high water cut reservoirs, the conventional profile control and water shutoff technology could not meet the needs of reservoir development. , the deep profile control (modulation and flooding) technology with greater effect and influence has achieved rapid development, and the theoretical understanding and technical development of improving water flooding have entered a new stage

Method used

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  • Water dispersible profile control agent for oil extraction and preparation method thereof
  • Water dispersible profile control agent for oil extraction and preparation method thereof
  • Water dispersible profile control agent for oil extraction and preparation method thereof

Examples

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preparation example Construction

[0018] figure 1 It is a flow chart of a preparation method of a water-dispersed profile control agent for oil recovery.

[0019] A preparation method of a water-dispersed profile control agent for oil recovery, the method comprising the following steps:

[0020] Dissolve 30-85 parts of inorganic salt in 230-500 parts of deionized water to make an aqueous solution, add 15-55 parts of dispersant and stir evenly, add 70-150 parts of acrylamide, add 5-10 parts of anionic monomer, add 5-10 1 part of cationic monomer, 1-5 parts of hydrophobic monomer, stir evenly and transfer to the reactor, heat up to 30°C, add 0.03-0.05 parts of 1# initiator for 30 minutes with nitrogen gas, continue to flow nitrogen gas for 10 minutes, add 0.01 part of 2# initiator -0.025 parts, add 0.01-0.025 parts of 3# initiator for 10 minutes with nitrogen gas, heat up to 50°C, stop nitrogen gas flow, and react at constant temperature for 12 hours to obtain the finished product.

Embodiment 1

[0022] A preparation of a water-dispersed profile control agent for oil recovery, which consists of the following components:

[0023]

[0024]

[0025] Preparation Process:

[0026] Dissolve 30 parts of sodium sulfate in 230 parts of deionized water to make an aqueous solution, add 15 parts of dextrin and stir well, add 70 parts of acrylamide, add 5 parts of fluoromethacrylic acid, add 5 parts of dimethyl[2-(methyl Acryloyloxy)ethyl][3-(trimethoxysilylpropyl]ammonium chloride, 1 part of vinyltriethoxysilane, stir evenly, transfer to the reactor, heat up to 30°C, blow nitrogen for 30min and add 0.03 part of azobisisobutyronitrile, continue to pass nitrogen gas for 10 minutes, add 0.01 part of ammonium persulfate, add nitrogen gas for 10 minutes, add 0.01 part of sodium bisulfite, raise the temperature to 50°C, stop nitrogen gas flow, and react at constant temperature for 12 hours to obtain the finished product.

Embodiment 2

[0028] A preparation of a water-dispersed profile control agent for oil recovery, which consists of the following components:

[0029]

[0030]

[0031] Preparation Process:

[0032] Dissolve 85 parts of ammonium sulfate in 500 parts of deionized water to make an aqueous solution, add 55 parts of β-cyclodextrin and stir evenly, add 150 parts of acrylamide, add 10 parts of silicon-containing methacrylic acid, add 10 parts of 2-(methacrylic acid Acyloxy)ethyltrimethylammonium chloride, 5 parts of vinyltrimethoxysilane, stirred evenly, transferred to the reactor, raised the temperature to 30°C, passed nitrogen gas for 30 minutes, added 0.05 parts of azobisisoheptanonitrile, and continued to pass Add 0.025 parts of potassium persulfate under nitrogen for 10 minutes, add 0.025 parts of sodium thiosulfate for 10 minutes under nitrogen, raise the temperature to 50°C, stop nitrogen, and react at constant temperature for 12 hours to obtain the finished product.

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Abstract

The invention discloses a water dispersible profile control agent for oil extraction and a preparation method thereof. The water dispersible profile control agent comprises the following components in parts by weight: 70-150 parts of acrylamide, 5-10 parts of anionic monomer, 5-10 parts of cationic monomer, 1-5 parts of hydrophobic monomer, 15-55 parts of dispersant, 30-85 parts of inorganic salt and 230-500 parts of deionized water. By virtue of water in water dispersion polymerization, the product is instant, so that the liquid preparation time and the curing time of a conventional polyacrylamide solution are shortened. A cationic chain link is introduced based on a conventional gel, so that gel molecules and rocks with negative electricity firmly adsorb so as to increase the flow resistance of water and improve the scouring resistance of the gel. The water dispersible profile control agent is low in initial viscosity, good in pumping property, simple in construction process and small in environmental damage. The water dispersible profile control agent is good in biological stability, and the profile control period of validity is over half a year. The product is obtained by virtue of water in water dispersion polymerization and is instant in the using process.

Description

Technical field: [0001] The invention relates to a water-dispersed profile control agent for oil recovery and a preparation method thereof. Background technique: [0002] The research and application of water plugging and profile control technology in my country can be traced back to the late 1950s. From the 1960s to the 1970s, oil well water plugging was the main focus. With the rapid development of profile technology, whether it is water plugging or profile control, high-strength plugging agents are mainly used, and the mechanism of action is mostly physical barrier plugging. In the 1990s, the oil field entered a period of high water cut, and the technology of profile control and water shutoff also entered its peak period of development, from single well treatment to comprehensive management of blocks with profile control and water shutoff measures as the mainstay. After entering the 21st century, oilfields generally have high water cut, the original heterogeneity of the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/512
CPCC09K8/512C09K8/5083
Inventor 孙安顺
Owner 大庆高新区华龙祥化工有限公司
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