Thermoplastic elastomer for profile control and water plugging and preparation method thereof

A thermoplastic elastomer, profile control and water plugging technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of complex and cumbersome preparation process, complex use method, complex process, etc., to achieve enhanced oil recovery , reduce production costs, simplify the process steps

Pending Publication Date: 2021-01-05
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its preparation raw materials are poisonous, organic solvent polymerization involves steps such as preparation of aromatic hydrocarbon monomer, comonomer and initiation system screening, polymerization and granulation, etc. The preparation process is complicated and cumbersome, and the flexible plugging agent needs to be dissolved in toluene, and the use method is complicated
[0006] CN106566501A discloses a flexible plugging agent, which reduces the cost of oil well production operations and improves the economic benefits of oil and gas development. substances, temperature regulators, which require more raw materials and complicated process, so the cost is high
However, thermoplastic elastomer particles have not been involved in the field of oilfield development at present, because most of the thermoplastic elastomer materials synthesized by traditional techniques are in the form of blocks, and the subsequent granulation process is required to be applied to oilfields, and the steps are cumbersome

Method used

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  • Thermoplastic elastomer for profile control and water plugging and preparation method thereof
  • Thermoplastic elastomer for profile control and water plugging and preparation method thereof
  • Thermoplastic elastomer for profile control and water plugging and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The preparation method of the thermoplastic elastomer for profile control and water plugging comprises the following steps:

[0045] (1) Take polyethylene glycol 8g, formaldehyde 1g, volumetric concentration be 36% concentrated hydrochloric acid 1g;

[0046] (2) Add polyethylene glycol to 100g of water, heat and stir to prepare a solution, the heating temperature is 90°C, the stirring speed is 100r / min, the stirring time is 1h, and cooled to 20°C;

[0047] (3) drop concentrated hydrochloric acid in the solution, the rate of addition is 5s / drop;

[0048] (4) Add 2g water and formaldehyde dropwise successively in the solution, the rate of addition of the second part of water is 5s / drop; the rate of addition of formaldehyde is 5s / drop, and after the addition is completed, stir at a temperature of 25°C for 0.5h, Then raise the temperature to 30°C and stir for 0.5h, and finally raise the temperature to 40°C and stir for 1h to obtain the product.

Embodiment 2

[0050] The preparation method of the thermoplastic elastomer for profile control and water plugging comprises the following steps:

[0051] (1) Take by weighing polyvinyl methyl ether 9g, β-propiolactone 2g, and the concentrated sulfuric acid 2g that volume concentration is 98%;

[0052] (2) Add polyvinyl methyl ether to 100g of water, heat and stir to prepare a solution, the heating temperature is 95°C, the stirring speed is 300r / min, the stirring time is 2h, and cooled to 30°C;

[0053] (3) drop the concentrated sulfuric acid in the solution, the rate of addition is 7s / drop;

[0054] (4) Add 2g water and β-propiolactone dropwise successively in the solution, the rate of addition of the second part of water is 10s / drop; Stir at a temperature of ℃ for 1h, then raise the temperature to 30°C and stir for 1h, and finally raise the temperature to 40°C and stir for 2h to obtain the product.

Embodiment 3

[0056] The preparation method of the thermoplastic elastomer for profile control and water plugging comprises the following steps:

[0057] (1) Take polyvinyl alcohol 10g, methyltriacetylsilane 3g, and volumetric concentration be 95% concentrated sulfuric acid 3g;

[0058] (2) Add polyvinyl alcohol to 100g of water, heat and stir to prepare a solution, the heating temperature is 95°C, the stirring speed is 500r / min, the stirring time is 2h, and cooled to 30°C;

[0059] (3) drop the concentrated sulfuric acid in the solution, the rate of addition is 10s / drop;

[0060] (4) Add 2g water and methyltriacetylsilane dropwise successively in the solution, and the rate of addition of the second part of water is 15s / drop; Stir at a temperature of 30°C for 1 hour, then raise the temperature to 40°C and stir for 3 hours to obtain this product.

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Abstract

The invention discloses a thermoplastic elastomer for profile control and water plugging. The thermoplastic elastomer is prepared from the following raw materials by weight: 8-10 parts of a componentA, 1-3 parts of strong acid, 1-3 parts of a hydrophobic modifier and 100-105 parts of water; wherein the component A is any one of polyethylene glycol, polyvinylmethyl ether, polyvinyl alcohol and a copolymer of acrylamide and acrylonitrile; the strong acid is any one of concentrated hydrochloric acid and concentrated sulfuric acid; the hydrophobic modifier is any one of formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, beta-propiolactone, gamma-butyrolactone, delta-valerolactone, methyltriacetylsilane, methyltrimethylsilane, butyl acrylate and ethylene glycol dimethacrylate. The thermoplastic elastomer for profile control and water plugging has the advantages of one time preparation molding, high deformation capacity, temperature and salt resistance, high stability and the like,and is suitable for large-scale production and application.

Description

technical field [0001] The invention relates to the technical field of oilfield chemical water shutoff and profile control agent, in particular to a thermoplastic elastomer for profile control and water shutoff and a preparation method thereof. Background technique [0002] With the continuous deepening of long-term water injection development of oil fields, the average water content of oil wells in my country has exceeded 80%, and the water content of some oil wells has even reached more than 90%. Optimum permeable channels for injected water continue to form in the reservoir, and the problem of water output from oil wells is serious, resulting in many problems such as low degree of control of water injection wells, reduced recovery of oil layers, serious scaling and corrosion of pipelines, and increased environmental pollution, which seriously restricts the efficiency of oilfields. Therefore, there is an urgent need to develop more efficient and high-quality oilfield chemi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/508C09K8/516
CPCC09K8/516C09K8/5086C09K8/5083C09K8/5045C08F8/28
Inventor 薛艳张春权黄丹李亮魏兵
Owner SOUTHWEST PETROLEUM UNIV
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