Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A low-viscosity acidification retarder, its preparation method and retarded acid system

A retarder and low-viscosity technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of reduced foam acid stability, increased acid fluid loss, and affecting the retarded acid effect. Achieve good polymerizability, reduce secondary damage, and good acid retarding performance

Active Publication Date: 2019-07-02
SOUTHWEST PETROLEUM UNIV +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Foam acid has the advantages of low liquid content, high apparent viscosity, and small fluid loss, which can effectively slow down the reaction rate of acid rock and quickly flow back. However, under high temperature conditions, the stability of foam acid decreases and the fluid loss of acid liquid The amount increases, thus affecting the effect of retarded acid

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
  • A low-viscosity acidification retarder, its preparation method and retarded acid system
  • A low-viscosity acidification retarder, its preparation method and retarded acid system
  • A low-viscosity acidification retarder, its preparation method and retarded acid system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with specific examples. It should be noted that the following examples are only preferred implementations of the present invention, and should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined in the claims. For those skilled in the art, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

[0029] One, the preparation method of acidification retarder of the present invention

[0030] First take 5% (accounting for the mass fraction of pure water) alkylphenol polyoxyethylene ether (OP-10) in a three-necked fla...

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

PropertyMeasurementUnit
areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a low-viscosity acidification retarder, a preparation method thereof and a retarded acid system. The acidification retarder is obtained by polymerization of monomers, and the monomers include: acrylamide, allyl polyoxyethylene ether- 1000, Methacryloyloxyethyltrimethylammonium Chloride and Octadecyl 2‑Methyl‑2‑Acrylate. The retarded acid system includes the following raw materials in parts by mass: 100 parts of concentrated hydrochloric acid with a mass concentration of 20%, 0.5 to 0.7 parts of acidification retarder, 1 part of acid corrosion inhibitor, 1 part of iron ion stabilizer, 1 part of 1 part clay stabilizer and 0.1 part drainage aid. The acidification retarder provided by the invention has low viscosity, good fluidity in acid liquid, easy injection, no obvious viscosity increase, and has the advantages of easy flowback and reduced secondary damage to the reservoir. The retarded acid system formed by the agent has good retarding effect.

Description

technical field [0001] The invention relates to an acidification retarder, a preparation method thereof and a retarded acid system, belonging to the technical field of petroleum and natural gas. Background technique [0002] Acidizing is one of the main technological measures for increasing and stabilizing production of oil and gas wells, and for stabilizing and increasing injection of water injection wells. It is a production stimulation measure that uses acid liquid to remove pollution at the bottom of production wells and water injection wells, restore the permeability of the formation or dissolve the rock cement in the formation to increase the permeability of the formation. It injects acid liquid into the formation, uses the chemical reaction between acid and minerals, dissolves the connected pores or fracture wall rocks in the reservoir, and increases the conductivity of pores and fractures, thereby increasing the production of oil and gas wells and increasing the inje...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/56C08F220/34C08F220/18C09K8/74
CPCC09K8/74C08F283/065C09K2208/12C08F220/1818C08F220/34
Inventor 全红平陈中豪张宁康王金玉张太亮谢欣苓
Owner SOUTHWEST PETROLEUM UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com