Thermosetting foam profile control agent and application thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A plugging control agent and thermosetting technology, which can be used in wellbore/well components, drilling composition, earth-moving drilling, etc. question
Active Publication Date: 2020-10-27
PETROCHINA CO LTD
View PDF12 Cites 4 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, the heavy oil thermal recovery plugging adjustment construction technology requires that the treatment agent be injected into the deep formation to delay the formation of thermosetting resin at high temperature, and the two synthesis processes form a sharp conflict.
As early as the 1950s, foreign countries began to use thermosetting phenolic resins in the fields of water plugging and profile control. However, during the preparation process, the resole phenolic prepolymer reacted with th
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0062] Synthesis of Foam Fixing Agent A
[0063]
[0064] Add 15g of sodium hydroxide and 60g of phenol into a 500mL three-neck flask equipped with a thermometer, a reflux condenser, and magnetic stirring, and add 140g of formaldehyde solution with a mass fraction of 33%-37% while stirring continuously. React at 45-95°C for 4 hours to obtain a resole phenolic prepolymer solution, cool and store in a refrigerator. FTIR,ⅴ / cm -1 : 3362, 1478 (characteristic peak), 1054 (ⅴCH 2 -O-CH 2 ,),751(ⅴC-CH 2 o), 879 (ⅴC-CH 2 right).
Embodiment 2
[0066] Synthesis of Foam Fixing Agent B
[0067]
[0068] Add 60g of formaldehyde into a 250mL three-necked flask equipped with a thermometer, reflux condenser, and magnetic stirring, adjust the pH value to weak alkalinity with dilute sodium hydroxide solution, stir in a water bath and heat, add 29g of urea, heat up to 50-80°C, and react at a constant temperature 30min, adjust the pH value with dilute hydrochloric acid, add 10g of urea, react at constant temperature for 20min, add 2g of urea, react at constant temperature for 30min, adjust to weak alkaline, cool down and discharge.
Embodiment 3
[0070] Synthesis of Curing Agent A
[0071]
[0072] Add 25g of neopentyl glycol and 70mL of chloroform into a 250mL four-neck flask equipped with a thermometer, reflux condenser, magnetic stirring, and tail gas absorption device, and slowly add 30mL of phosphorus oxychloride dropwise at room temperature. to 65°C, react for 5h, until no HCl gas is released, distill off the chloroform and excess phosphorus oxychloride to obtain a white solid, the intermediate 5,5-dimethyl-1,3-dioxaphosphorinine Alkylphosphoryl chloride, yield 83.5%, melting point 99-102°C (literature value 98-102°C).
[0073] Add chloroform and intermediates to the three-necked flask, add water dropwise at room temperature, and control the reaction temperature at 50°C until the reaction temperature does not change with the addition of water, indicating that the hydrolysis reaction is fully completed, separate the chloroform, and neutralize the aqueous phase with sodium hydroxide. Distillation under reduced ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Property
Measurement
Unit
Permeability
aaaaa
aaaaa
Login to view more
Abstract
The invention discloses a thermosetting foam profile control agent and application thereof. The thermosetting foam profile control agent comprises a foam fixing agent, a curing agent and a foaming agent, wherein the foam fixing agent is a resin prepolymer, and the curing agent is water-soluble temperature control decomposition type slow-release acid. According to the invention, by researching anddeveloping water-soluble temperature-controlled decomposition slow-release acid and a temperature-resistant foaming agent, an underground cross-linked thermosetting phenolic foam plastic (wet method)meeting a thick oil thermal recovery plugging control construction process is modified and researched; a low-molecular resin prepolymer and a curing agent stably exist in a foam liquid film, so that the foaming volume and the half-life period are not influenced; and a curing agent is decomposed to generate an acid at a high temperature, hydrophilic resin hydroxymethyl bonds are catalyzed to be subjected to condensation polymerization to form hydrophobic resin methylene bonds, free water bound by a space net structure and coated with a liquid film is formed, and the foam liquid film is converted into a thermosetting resin hard shell, so that the influence of high temperature, stratum pore size and injected water dilution scouring on foam plugging strength, heat stability and validity periodis avoided.
Description
technical field [0001] The invention belongs to the technical field of oil field exploitation, and in particular relates to a thermosetting foam plugging regulating agent and application thereof. Background technique [0002] Steam injection thermal oil recovery is the most effective technical means to greatly increase the recovery of heavy oil and super heavy oil, but the unfavorable mobility ratio between steam and heavy oil, the heterogeneity conditions of the reservoir, and the pressure of steam itself Factors such as gravity overlay make it easy for steam to channel in the formation during steam injection for thermal recovery, and the uneven steam absorption profile reduces the utilization rate of steam, which affects the deep development of heavy oil reservoirs (Li Deru, Pang Zhanxi. Thermal Foam improves the development effect of steam flooding in heavy oil reservoirs, Special Reservoirs, 2016,23(5):89-92.). [0003] Nitrogen foam system can be injected into the deep...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more