Synergist for soil acid acidification, and preparation method and use method thereof

A technology of synergist and soil acid, applied in chemical instruments and methods, drilling compositions and other directions, can solve the problems of short effective action distance of acidizing solution, low secondary precipitation inhibition rate and fast reaction speed, etc. Achieve normal water injection, restore oil well fluid supply capacity, and improve efficiency

Inactive Publication Date: 2020-08-21
西安长庆化工集团有限公司 +1
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, provide a kind of soil acid acidification synergist and its preparation and use method, overcome 1 in the prior art: the reaction speed of soil acid and rock is fast, the penetration distance Short, the effective action distance of the acidizing fluid is short, and the formation with high clay mineral content is easy to acid cross the well wall, causing collapse or sand production; 2: easy to cause secondary precipitation; 3: use phosphonate compound and fluoride salt reaction The acid system that generates HF has problems such as high acid cost, low secondary precipitation inhibition rate (only about 60%), and poor effect on barium sulfate scale.

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
  • Synergist for soil acid acidification, and preparation method and use method thereof
  • Synergist for soil acid acidification, and preparation method and use method thereof
  • Synergist for soil acid acidification, and preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0034] It should be noted that the structures, proportions, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for the understanding and reading of those familiar with this technology, and are not used to limit the conditions for the implementation of the present invention , any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope covered by the technical content disclosed in the present invention without affecting the effect and purpose of the present invention. .

[0035] At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit this specification. The practicable scope of the invention and the change or adjustment of its relative relationship shall also be regarded as the practicable scope of the present invention without...

Embodiment 1

[0037] The invention discloses a synergist for soil acid acidification, which consists of the following components and their mass percentages: 25% to 38% of a barium strontium sulfate scale solubilizer, 18% to 25% of a polycarboxylic acid dispersant, Penetrant 5%-15%, mutual solvent 12%-20%, and water to make up the rest.

Embodiment 2

[0039] The invention discloses a synergist for soil acid acidification, which consists of the following components and their mass percentages: 25% to 38% of a barium strontium sulfate scale solubilizer, 18% to 25% of a polycarboxylic acid dispersant, Penetrant 5%-15%, mutual solvent 12%-20%, and water to make up the rest.

[0040] Preferably, the mass percentage of each component is: 26% to 35% of barium strontium sulfate scale solubilizer, 20% to 24% of polycarboxylic acid dispersant, 6% to 12% of penetrant, and 14% of mutual solvent % ~ 18%, water to make up the balance.

[0041]Preferably, the mass percentages of each component are: barium strontium sulfate scale solubilizer 30%, polycarboxylate dispersant 20%, penetrant 10%, mutual solvent 15%, water 25%.

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
interfacial tensionaaaaaaaaaa
Login to view more

Abstract

The invention discloses a synergist for soil acid acidification, and a preparation method and a use method thereof. The synergist is prepared from, by mass, 25-38% of a barium sulfate strontium scalesolubilizer, 18-25% of a polycarboxylic acid dispersant, 5-15% of a penetrant, 12-20% of a mutual solvent, and the balance of water. The raw materials in the formula are environment-friendly, non-toxic and harmless, and a small amount of synergist for soil acid acidification is added to a conventional solonic acid solution system to quickly complex with calcium ions, barium ions, iron ions and thelike after an acid liquid reaction, so the solubility product of barium sulfate is improved, dissolution of barium sulfate is achieved, the inhibition performance of acid liquor on secondary precipitation of calcium fluoride, fluoroaluminate, ferric hydroxide and the like is effectively improved, expanded clay mineral crystal lattices are distorted and dehydrated, and blocked stratum pores are recovered. The synergist for soil acid acidification can effectively solve the damage of secondary precipitation caused in the conventional soil acid acidification process to stratums.

Description

technical field [0001] The invention belongs to the technical field of soil acid acidification, and in particular relates to a synergist for soil acid acidification and a preparation and use method thereof, which are used for adding soil acid in the sandstone acidification process. Background technique [0002] Acidizing work is also an essential material basis for acidizing operations. Its quality is directly related to the success or failure of acidizing operations, and plays a key role in increasing production and injection. In order to protect the formation, improve the acidizing effect, and maximize the use of acid For the function of the formation, it is necessary to comprehensively screen the formula of the acid solution according to the characteristics of the formation, the function and performance of the acid solution and additives, so that it can meet the requirements of the acidizing process and be compatible with the formation to achieve the purpose of effectively...

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 Applications(China)
IPC IPC(8): C09K8/60C09K8/74C09K8/78
CPCC09K8/78C09K8/74C09K8/602C09K8/604C09K8/607
Inventor 王伟波杨海燕王海军张庆祝胡军万华沈燕鸿胡鹏飞李雅俐赵静窦淼周春玲
Owner 西安长庆化工集团有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap