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Water-soluble phenol-formaldehyde resin cross-linking agent low-temperature rapid gelatinizing cross-linking promoter, preparation method and application thereof

A technology of water-soluble phenolic resin and cross-linking agent, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as easy dilution by formation water, low jelly strength, and fast cross-linking reaction speed, and achieve The composition is simple and easy to configure, promotes cross-linking reaction, and has strong selectivity

Inactive Publication Date: 2020-02-14
DAGANG OIL FIELD GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The research on the above-mentioned various water-soluble phenolic resin cross-linking agents at low temperature (coagulation) agents all have problems due to the addition of cross-accelerators, which lead to too fast cross-linking reaction speed between the water-soluble phenolic resin cross-linking agent and the polymer, and the gelation time is short , and the jelly strength is low (maximum 11000mPa·s), which cannot meet the technical requirements of deep profile control (the required gelling time is adjustable from 24 to 120h, and the gelling strength is greater than 20000mPa·s)
At the same time, some interactors are toxic, highly carcinogenic, and easily diluted by formation water.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: (1) cross-accelerator raw material (all is commercially available industrial product): tap water 83.3g, polyethyleneimine 5.0g, sodium carbonate 5.0g, sodium chloride 6.7g. Strictly follow the preparation method described above, and mix the components evenly, which is the low-temperature and rapid gelling accelerator for the water-soluble phenolic resin crosslinking agent of this product.

[0034] (2) Preparation of jelly profile control agent: take 500mL of tap water, add 4.5‰ water-soluble phenolic cross-linking agent and 3‰ hydrolyzable polyacrylamide in order according to the mass ratio of the preparation liquid, stir for 10 minutes, then add 4.5‰ Delivery, continue to stir for 60 minutes, using DV-II + Pro-type BROOKFIELD rotary viscometer, 5# rotor rotates at 5rpm, and the initial viscosity of the jelly profile control agent aqueous solution is measured as 1200mPa·s.

[0035] (3) Take 100mL of the jelly profile control agent aqueous solution in (2) ...

Embodiment 2

[0039] (1) Raw materials of cross-accelerator (all are commercially available industrial products): 78.0 g of tap water, 1.0 g of polyethyleneimine, 1 g of sodium carbonate, and 20.0 g of sodium chloride. Strictly follow the preparation method described above, and mix the components evenly, which is the low-temperature and rapid gelation accelerator for the water-soluble phenolic resin cross-linking agent of this product. Wherein, the molecular weight of the cationic imine copolymer is 3000-5000, the same below.

[0040] (2) Preparation of jelly profile control agent: take 500mL of tap water, add 1.5‰ water-soluble phenolic crosslinking agent and 3‰ hydrolyzable polyacrylamide in order according to the mass ratio of the preparation liquid, stir for 10 minutes, then add 1.5‰ Delivery, continue to stir for 60 minutes, using DV-II + Pro-type BROOKFIELD rotational viscometer, 5# rotor rotates at 5 rpm, and the initial viscosity of the jelly profile control agent aqueous solution ...

Embodiment 3

[0043] Embodiment 3: 1) Raw materials of cross-accelerator (all are commercially available industrial products): 85.0 g of tap water, 2.5 g of polyethyleneimine, 2.5 g of sodium carbonate, and 10 g of sodium chloride. Strictly follow the preparation method described above, and mix the components evenly, which is the low-temperature and rapid gelling accelerator for the water-soluble phenolic resin cross-linking agent of this product. Wherein, the molecular weight of the cationic imine copolymer is 3000-5000, the same below.

[0044] (2) Preparation of jelly profile control agent: take 500mL of tap water, add 3‰ water-soluble phenolic crosslinking agent and 3‰ hydrolyzable polyacrylamide in order according to the mass ratio of the preparation solution, stir for 10 minutes, add 3‰ accelerator Delivery, continue to stir for 60 minutes, using DV-II + Pro-type BROOKFIELD rotational viscometer, 5# rotor rotates at 5rpm, and the initial viscosity of the jelly profile control agent a...

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Abstract

Belonging to the technical field of profile control and water plugging of oil-water wells in petroleum exploitation, the invention particularly relates to a water-soluble phenol-formaldehyde resin cross-linking agent low-temperature rapid gelatinizing cross-linking promoter, a preparation method and application thereof. The promoter comprises the following components by weight percentage: 1.0-5.0%of a cationic imine copolymer, 1.0-5.0% of weak base, 0-20.0% of a mineralization degree regulator and the balance tap water; wherein the adding amount of the mineralization degree regulator meets the requirement for a final content of greater than 0.3 per thousand in an applied gel profile control agent. According to the promoter provided by the invention, the gelling time of the promoter and partially hydrolyzed anionic polyacrylamide at a low oil reservoir temperature can be controlled within 12-120h, the initial viscosity is 700-1200mPa.s, and the final set strength can be controlled at 20000-80000mPa.s, therefore the water-soluble phenol-formaldehyde resin cross-linking agent low-temperature rapid gelatinizing cross-linking promoter can be suitable for profile control and water plugging operation of large preferential channeling path in stratum at a temperature of 60DEG C or below.

Description

technical field [0001] The invention belongs to the technical field of oil-water well profile control and water plugging in oil exploitation, and in particular relates to a water-soluble phenolic resin cross-linking agent low-temperature rapid gelling cross-linking agent and its preparation method and application. Background technique [0002] Jelly profile control agent is one of the most widely used profile control agents for oil-water well profile control and water shutoff. It is mainly composed of polyacrylamide and cross-linking agent. Through the cross-linking reaction of the two, a polymer gel with a three-dimensional network structure is formed. Cross-linking agents are generally divided into low-temperature cross-linking agents below 60°C, medium-temperature cross-linking agents between 60-90°C and high-temperature cross-linking agents above 90°C according to the profile control formation temperature. [0003] Among them, the polyvalent metal ion crosslinking agent ...

Claims

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Application Information

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IPC IPC(8): C08J3/24C09K8/512C08L33/26C08L61/06
CPCC08J3/246C09K8/512C09K8/5086C08J2333/26C08J2461/06C08J2361/06C08J2433/26
Inventor 杨卫华葛红江袁肖肖汪晓敏易博程静雷齐玲王心刚
Owner DAGANG OIL FIELD GRP