Depressurization and augmented injection scale inhibitor for low-permeation water injection well and preparation method of depressurization and augmented injection scale inhibitor

An anti-scaling agent and low-permeability technology, applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve problems such as calcium sulfate insoluble scaling, prevent corrosion and scaling, and improve recovery rate, anti-corrosion and anti-fouling effects

Inactive Publication Date: 2017-06-13
PETROCHINA CO LTD
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] An object of the present invention is to provide a kind of anti-scaling agent for low-permeability water injection wells; the anti-scaling agent of the present invention can solve the problem of refractory scales such as calcium sulfate, barium sulfate, strontium sulfate, etc. that cannot be

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This example provides an anti-scaling agent for low-permeability water injection wells, which is composed of the following raw materials in parts by weight: 11 parts of nonionic surfactant, 19 parts of hexasodium triethylenetetraamine hexaacetic acid, 6 parts of anionic surfactant, 7 parts of organic phosphonic acid carboxylic acid scale inhibitor, 4 parts of dispersant, 16 parts of diluent, 9 parts of organic amine salt, 32 parts of water.

[0027] Preparation method: In a dry enamel reaction kettle, add 320kg of water, 70kg of organic phosphonic acid carboxylic acid scale inhibitor, 60kg of anionic surfactant and 110kg of nonionic surfactant in sequence, turn on the stirring device, and stir Add 90kg of organic amine salt and 190kg of triethylenetetraaminehexaacetic acid hexasodium salt, heat to 80°C and react for 2 hours, then cool to room temperature, and discharge 160kg of diluent and 40kg of dispersant to obtain commercial low-permeability water injection wells wit...

Embodiment 2

[0031] This example provides an anti-scaling agent for low-permeability water injection wells, which is composed of the following raw materials in parts by weight: 10 parts of nonionic surfactant, 18 parts of triethylenetetraamine hexaacetic acid hexasodium salt, 5 parts of anionic surfactant, 6 parts of organic phosphonic acid carboxylic acid scale inhibitor, 2 parts of dispersant, 15 parts of diluent, 8 parts of organic amine salt, 30 parts of water.

[0032] Preparation method: In a dry enamel reaction kettle, add 300kg of water, 60kg of organic phosphonic acid carboxylic acid scale inhibitor, 50kg of anionic surfactant and 100kg of nonionic surfactant in sequence, turn on the stirring device, and stir Add 80kg of organic amine salt and 180kg of triethylenetetraaminehexaacetic acid hexasodium salt, heat to 80°C and react for 3 hours, then cool to room temperature, 150kg of diluent and 20kg of dispersant are discharged to obtain commercial low-permeability water injection wel...

Embodiment 3

[0035] This embodiment provides an antiscaling agent for low-permeability water injection wells, which is composed of the following raw materials in parts by weight: 12 parts of nonionic surfactant, 20 parts of triethylenetetraamine hexaacetic acid hexasodium salt, 8 parts of anionic surfactant, 8 parts of organic phosphonic acid carboxylic acid scale inhibitor, 5 parts of dispersant, 15-18 parts of diluent, 10 parts of organic amine salt, 36 parts of water.

[0036]Preparation method: In a dry enamel reaction kettle, add 360kg of water, 80kg of organic phosphonic acid carboxylic acid scale inhibitor, 80kg of anionic surfactant and 120kg of nonionic surfactant in sequence, turn on the stirring device, and stir Add 100kg of organic amine salt and 200kg of triethylenetetraaminehexaacetic acid hexasodium salt, heat to 80°C and react for 4 hours, then cool to room temperature, 180kg of diluent and 50kg of dispersant are discharged to obtain commercial low-permeability water injecti...

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

No PUM Login to view more

Abstract

The invention provides a depressurization and augmented injection scale inhibitor for a low-permeation water injection well and a preparation method of the depressurization and augmented injection scale inhibitor. The depressurization and augmented injection scale inhibitor is prepared from the following raw materials: 10-12 parts of a nonionic surfactant, 18-20 parts of a triethylenetetramine-N,N,N',N'',N''',N'''-hexaacetic acid hexasodium salt, 5-8 parts of an anionic surfactant, 6-8 parts of an organic phosphonocarboxylic acid scale inhibitor, 2-5 parts of a dispersant, 15-18 parts of a diluents, 8-10 parts of an organic amine salt and 30-36 parts of water. The depressurization and augmented injection scale inhibitor for the low-permeation water injection well has the characteristic of multiple efficacy with one dose, is good in effects of swelling resistance, swelling shrinkage, corrosion inhibition and calcium sulfate and barium (strontium) sulfate scale inhibition when the dosage is 0.5 percent of water injection rate of the water injection well and barium sulfate solubility is improved by 3125 times at the temperature being 60 DEG C.

Description

technical field [0001] The invention relates to the field of oil exploitation, in particular to an anti-scaling technology for oil exploitation, and more specifically to a pressure-reducing and increasing-injection anti-scaling agent for low-permeability water injection wells and a preparation method thereof. Background technique [0002] Low-permeability reservoirs have poor reservoir properties, mainly low-porosity and low-permeability thin-throat reservoir structure. In addition, the content of cement is high, and the reservoir physical properties lead to high water injection pressure and difficult injection of water injection wells. [0003] Difficult water injection and high injection pressure are common problems in low permeability reservoirs. Analysis of the reasons for high water injection pressure: the fundamental reason is that low (ultra-low) permeability reservoirs have a starting pressure gradient, which must be overcome during water injection development to est...

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
IPC IPC(8): C09K8/528
CPCC09K8/528C09K2208/12C09K2208/32C07F9/091C07F9/3808C09K8/584C23F14/02C07C55/24C07C229/04C07F9/3873E21B43/16
Inventor 隋蕾张随望陆小兵陆红军慕立俊王勇宋昭杰邓志颖王尔珍
Owner PETROCHINA CO LTD
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