Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of nano-material composite strengthened jelly fracturing fluid and preparation method thereof

A technology of jelly fracturing fluid and nano-materials, which is applied in the field of nano-material composite strengthened jelly fracturing fluid and its preparation, can solve the problems of fracturing fluids such as difficulty in gel breaking, impossibility of oilfield application, and high residue content, and is easy to promote , low cost, and the effect of improving viscosity and viscoelastic properties

Active Publication Date: 2020-11-06
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF21 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN104927828A discloses a high-temperature-resistant zirconium acetate cross-linked jelly fracturing fluid, but there are still problems of fracturing fluid gel breaking, high residue content, and great damage to the reservoir
CN103387827A discloses a nano-material association clean fracturing fluid system, but there is a problem that the cost is high and it cannot be applied in oil fields on a large 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
  • A kind of nano-material composite strengthened jelly fracturing fluid and preparation method thereof
  • A kind of nano-material composite strengthened jelly fracturing fluid and preparation method thereof
  • A kind of nano-material composite strengthened jelly fracturing fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] A preparation method of nanomaterial composite reinforced jelly fracturing fluid, comprising the following steps:

[0032] (1) Preparation of nanomaterial solution: nano-SiO 2 The particles and nanocellulose CNF are added to water according to the set ratio, stirred until they are evenly mixed to obtain a mixed solution, and then the mixed solution is ultrasonically dispersed at 50°C until the mixed solution is clear and transparent, and a uniformly dispersed base liquid is obtained;

[0033] (2) using a part of the base liquid as the first solvent, adding a thickener according to a set ratio, and stirring until clear and transparent to obtain the first solution;

[0034] (3) using another part of the base liquid as the second solvent, adding a crosslinking agent according to a set ratio, and stirring until it is clear and transparent to obtain a second solution;

[0035] (4) The first solution and the second solution are uniformly mixed according to a set ratio to obt...

Embodiment 1

[0037]A nano-material composite reinforced jelly fracturing fluid, which is composed of the following components in mass percentage: 0.8% of partially hydrolyzed polyacrylamide, 0.5% of zirconium acetate, nano-SiO 2 0.08% of particles, 0.02% of nanocellulose CNF, and the balance is water. The partially hydrolyzed polyacrylamide is obtained by hydrolysis of pure polyacrylamide PAM in an alkaline solution, the degree of hydrolysis is 20%, and the relative molecular mass is 7.5 million.

[0038] The preparation method of the nano-material composite reinforced jelly fracturing fluid is:

[0039] nano-SiO 2 The particles and nanocellulose CNF were added to ultrapure water according to the set ratio, and stirred magnetically for 30 minutes until they were evenly mixed. Then, the mixed solution was placed in an ultrasonic cleaner and ultrasonically dispersed at 50°C for 4 hours until the mixed solution was clear and transparent. Obtain a uniformly dispersed base liquid; use a part ...

Embodiment 2

[0043] A nano-material composite reinforced jelly fracturing fluid, which consists of the following components in mass percentage: 0.6% of acrylamide and acrylate copolymer, 0.3% of zirconium acetate, nano-SiO 2 0.06% of particles, 0.04% of nanocellulose CNF, and the balance is water. The degree of hydrolysis of the acrylamide and acrylate copolymer is 25%, the molecular weight is 6 million, it is a copolymer of two monomers of acrylamide and 1,3 propyl sulfonate, and the mass ratio of the two monomers is 3 :1.

[0044] The preparation method of the nano-material composite reinforced jelly fracturing fluid is:

[0045] nano-SiO 2 The particles and nanocellulose CNF were added to ultrapure water according to the set ratio, and stirred magnetically for 30 minutes until they were evenly mixed. Then, the mixed solution was placed in an ultrasonic cleaner and ultrasonically dispersed at 50°C for 3 hours until the mixed solution was clear and transparent. Obtain a uniformly dispe...

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
particle diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a nano-material composite enhanced jelly fracturing fluid, which is composed of the following components in mass percentage: 0.4%-1% of a thickener, 0.25%-1% of a cross-linking agent, nano-SiO 2 0.02% to 0.5% of particles, 0.02% to 0.1% of nano cellulose, and the balance is water. The invention also discloses its preparation method, including nano-SiO 2 Add particles and nanocellulose into water according to the set ratio, mix well, and then ultrasonically disperse the mixed solution at 50°C until it is clear and transparent to obtain the base liquid; add a part of the base liquid to the thickener and stir until it is clear and transparent to obtain the first solution Add a cross-linking agent to another part of the base fluid and stir until it is clear and transparent to obtain a second solution; mix the first solution and the second solution uniformly in proportion to obtain nanomaterial composite reinforced jelly fracturing fluid. The jelly fracturing fluid of the present invention is easy to prepare, low in price, meets the performance index of the on-site fracturing fluid in oil and gas fields, further improves the viscosity and viscoelastic properties of the fracturing fluid, reduces the amount of polymer, reduces residue, is easy to flow back, and reduces the impact on the fracturing fluid. Reservoir damage.

Description

technical field [0001] The invention relates to the technical field of oil recovery chemistry in the development of oil and gas fields, in particular to a nano-material composite enhanced jelly fracturing fluid and a preparation method thereof. Background technique [0002] With the rapid development of oil economy and the development of oilfields, less and less oil is produced by conventional oilfield methods, so the deep development of oil and the improvement of extraction efficiency have become particularly prominent. In recent years, the global development of unconventional oil and gas resources has advanced by leaps and bounds, especially in the United States, Canada and other countries. Since the 1990s, the proven reserves of my country's low-permeability oil and gas reservoirs have been increasing, and their proportion has accounted for more than 60% of the proven reserves at present, which has great development prospects. Although a large number of low-porosity and ...

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): C09K8/68
CPCC09K8/685C09K2208/10
Inventor 赵明伟戴彩丽杨倩茹吴一宁孙永鹏赵光李琳王欣管保山刘萍
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)