Nano pressure-reducing injection-increasing oil-displacing viscosity-reducing integrated agent, preparation method and application thereof

A nanometer and oil-displacement technology, applied in chemical instruments and methods, production fluids, earth drilling and production, etc., can solve problems such as difficulty in achieving low interfacial tension and insufficient injection effect, and achieve elimination of clogging, reduction of surface and interfacial tension, The effect of improving oil washing efficiency

Active Publication Date: 2021-04-30
PETROCHINA CO LTD
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to achieve low interfacial tension (10 -2 mN / m)
[0007] Since the existing main measures to solve the injection difficulties in low-permeability oil reservoirs are not good enough, it is urgent to develop a new technical solution to improve the injection effect, thereby improving the production efficiency of oil wells

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
  • Nano pressure-reducing injection-increasing oil-displacing viscosity-reducing integrated agent, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] The preparation method of the nano pressure-reducing and increasing-injection oil displacement and viscosity-reducing integrated agent of the present invention comprises the following process:

[0033]Add oil-soluble comb polymer, triethylenetetraaminehexaacetic acid, dihexyltriaminepentamethylene phosphoric acid, cocamidopropyl sulfobetaine, xylene and dioctadecane in sequence in the reaction kettle Dimethyl ammonium chloride, nonylphenol polyoxyethylene ether TX-15 and water were stirred for 30 minutes, then monoethanolamine was added to react for 30 minutes, then methanol was added, and the nanometer pressure-reducing injection flooding and viscosity-reducing All in one.

[0034] The nano-scale pressure-reducing, increasing-injection, oil-flooding and viscosity-reducing integrated agent of the present invention is used in water injection well operations. When the nano-scale pressure-reducing, increasing-injection, oil-flooding and viscosity-reducing integrated agent ...

Embodiment 1

[0036] This embodiment provides a nano-scale pressure-increasing injection flooding oil displacement and viscosity-reducing integrated agent. The raw material composition of the nano-scale pressure-increasing injection oil flooding and viscosity-reducing integrated agent includes 10% polyethylene terephthalic acid di-p-methoxy Phenyl Esters, 10% Triethylenetetraminehexaacetic Acid, 10% Dihexyltriamine Pentamethylene Phosphate, 10% Monoethanolamine, 10% Cocamidopropyl Mestaine, 25% xylene, 5% dioctadecyldimethylammonium chloride, 15% nonylphenol polyoxyethylene ether TX-15, 20% methanol, and the balance is water.

[0037] This embodiment also provides a preparation method of the above-mentioned nano-scale pressure-reducing and increasing-injection oil flooding and viscosity-reducing integrated agent, which specifically includes the following steps:

[0038] Add polyvinyl di-p-methoxyphenyl terephthalate, triethylenetetraminehexaacetic acid, dihexamethylene triamine pentamethyle...

Embodiment 2

[0056] This embodiment provides a nano-scale pressure-increasing injection flooding oil flooding and viscosity-reducing integrated agent. The raw material composition of the nano-scale pressure-increasing injection oil flooding and viscosity-reducing integrated agent includes 8% polyvinyl terephthalic acid di-p-methoxy Phenyl esters, 8% triethylenetetraminehexaacetic acid, 9% dihexyltriaminepentamethylene phosphate, 9% monoethanolamine, 9% cocamidopropyl mestaine, 23% xylene, 4% dioctadecyldimethylammonium chloride, 13% nonylphenol polyoxyethylene ether TX-15, 18% methanol, and the balance is water.

[0057] The performance of the above-mentioned integrated agent of this embodiment was tested indoors. Its quality technical indicators are as follows:

[0058] Appearance: Colorless transparent liquid at room temperature;

[0059] pH value: 7.1;

[0060] Anti-expansion rate 65%;

[0061] Shrinkage rate 33%;

[0062] Calcium sulfate scale inhibition rate is 93%;

[0063] The...

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
scale inhibition rateaaaaaaaaaa
scale inhibition rateaaaaaaaaaa
Login to view more

Abstract

The invention provides a nano pressure-reducing injection-increasing oil-displacing viscosity-reducing integrated agent, a preparation method and application thereof. The integrated agent comprises the following raw materials in percentage by weight: 5.0%-10.0% of an oil-soluble comb polymer, 5.0%-10.0% of triethylene tetramine hexaacetic acid, 8.0%-10.0% of diethylene triamine pentamethylene phosphoric acid, 8.0%-10.0% of monoethanolamine, 5.0%-10.0% of cocamidopropyl hydroxysulfonic acid betaine, 20.0%-25.0% of xylene, 3.0%-5.0% of dioctadecyl dimethyl ammonium chloride, 10.0%-15.0% of nonylphenol polyoxyethylene ether TX-15, 15.0%-20.0% of methyl alcohol and the balance water. The invention also provides a preparation method of the integrated agent. According to the invention, the nano pressure-reducing injection-increasing oil-displacing viscosity-reducing integrated agent is used as a water injection well additive, the oil-water interfacial tension can be effectively reduced to 10<-3> mN/m level by adding 0.1-0.3% of the nano pressure-reducing injection-increasing oil-displacing viscosity-reducing integrated agent, formation blockage caused by barium strontium sulfate and organic scale in the formation can be effectively eliminated, crude oil viscosity and condensation point can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of oil reservoir exploitation, and in particular relates to a nanometer pressure-reducing, increasing-injection, oil-flooding and viscosity-reducing integrated agent, a preparation method and application thereof. Background technique [0002] Low-permeability oil fields have the characteristics of low permeability, small porosity, and low water absorption capacity of the reservoir. In addition, factors such as clay minerals in the oil layer swell with water and the water quality of the injected water are not compatible with the oil layer cause damage to the oil layer, resulting in continuous rise in water injection pressure. A high pressure zone forms near the injection well. At the same time, long-term high-pressure water injection can easily lead to casing damage, and under-injection of water wells can easily lead to stress-sensitivity effects in the reservoir, which seriously restricts the water injection...

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): C09K8/58E21B43/22
CPCC09K8/58E21B43/16
Inventor 王勇慕立俊姚斌姬振宁张随望陆小兵宋昭杰隋蕾邓志颖王尔珍
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