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

A method of using white mud to prepare ultra-low density fracturing proppant

A fracturing proppant and ultra-low density technology, applied in the field of fracturing oil production, can solve the problems of high cost, poor temperature resistance, low proppant strength, etc., so as to reduce preparation cost, improve strength and temperature resistance, and increase utilization The effect of rate and added value

Inactive Publication Date: 2017-02-08
CHINA UNIV OF GEOSCIENCES (WUHAN)
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of proppant often has the defects of low strength, poor temperature resistance and high cost.

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 method of using white mud to prepare ultra-low density fracturing proppant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Modification of white clay:

[0033] Mix 100ml of toluene solution, 50g of white mud and 1g of KH570, raise the temperature of the water bath to 90°C and stir magnetically for 6 hours. After the reaction, wash once with toluene (the used toluene solution can be directly recovered and reused), and dry at 75°C. Get modified white clay.

[0034] Preparation of ultra-low density fracturing proppant:

[0035] Add 140ml distilled water, 10ml NaOH (2mol / L) solution and 10ml 1mol / LMgCl to the container 2 solution (reaction to obtain magnesium hydroxide dispersant), the temperature of the water bath was raised to 60 ° C and mechanically stirred, and 2 g of modified white mud was added immediately, and then 20 g of methyl methacrylate, 3 g of divinylbenzene (DVB), 0.35 g of initiator (BPO ) after stirring and mixing, drop it into the container, adjust the speed to 250r / min, raise the temperature to 80°C for 0.5h, 85°C for 1h, 90°C for 1h, stop the reaction and suction filter, w...

Embodiment 2

[0037] Modification of white clay:

[0038] Mix 100ml of toluene solution, 50g of white mud and 2g of KH550, raise the temperature of the water bath to 95°C and stir magnetically for 5 hours. After the reaction, wash once with toluene (the used toluene solution can be directly recovered and reused), and dry at 75°C. Get modified white clay.

[0039] Preparation of ultra-low density fracturing proppant:

[0040] Add 140ml distilled water, 10ml NaOH (2mol / L) solution and 10ml 1mol / L MgCl to the container 2 Solution, heat up the water bath to 60°C and mechanically stir, immediately add 4g of modified white mud, then stir and mix 20g of methyl methacrylate, 3g of DVB, and 0.35g of BPO, then drop them into the container, adjust the speed to 280r / min, and raise the temperature to 75°C React for 1 hour, react for 1 hour at 85°C, react for 1 hour at 90°C, stop the reaction and filter with suction, wash several times with distilled water, dry at 70°C, and pass through a 10-60 mesh si...

Embodiment 3

[0042] Modification of white clay:

[0043]Mix 100ml of toluene solution, 50g of white clay and 1g of KH570, raise the temperature of the water bath to 100°C and stir magnetically for 4 hours. After the reaction, wash once with toluene (the used toluene solution can be directly recovered and reused), and dry at 75°C. Get modified white clay.

[0044] Preparation of ultra-low density fracturing proppant:

[0045] Add 140ml distilled water, 10ml NaOH (2mol / L) solution and 10ml 1mol / L MgCl to the container 2 Solution, heat up the water bath to 60°C and stir mechanically, immediately add 6g of modified white mud, then stir and mix 20g of methyl methacrylate, 3g of DVB, and 0.35g of BPO, drop them into the container, adjust the speed to 300r / min, and raise the temperature to 80°C React for 1 hour, react for 2 hours at 85°C, react for 1 hour at 90°C, stop the reaction and filter with suction, wash several times with distilled water, dry at 70°C, and pass through a 10-60 mesh sieve...

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
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing an ultra low density fracturing and propping agent by using white clay. The method comprises the following steps: firstly, taking the white clay and a coupling agent, dispersing the white clay and the coupling agent into toluene, stirring the white clay, the coupling agent and the toluene, and after a reaction is completed, sucking, filtering and drying the white clay, the coupling agent and the toluene which are stirred to obtain modified white clay, wherein the white clay is fly ash extracted aluminum residues, and the added quantity of the coupling agent is 1-5wt% of the white clay; using water as a disperse medium, adding a dispersing agent and then adding the modified white clay, dripping monomer solutions in which a cross linking agent and an initiating agent are dissolved, performing a polyreaction, and filtering, cleaning and drying reactants to obtain an ultra-low-density petroleum fracturing and propping agent. The density of the propping agent prepared by the method disclosed by the invention is 1.08-1.25g / cm3 and is close to the density of the water, in the use process, saline water can be used as sand carrying liquid, the compressive strength of the propping agent is high, and the largest crushing rate under 52Mpa is only 3.65%, so that the propping agent is suitable for fracturing of a deep well. In addition, the preparation technology is simple, the propping agent can be used for industrial grade production, the fracturing construction cost is greatly reduced, and the increase in the oil production of petroleum is facilitated.

Description

technical field [0001] The invention belongs to the technical field of fracturing and oil recovery, and in particular relates to a method for preparing an ultra-low density fracturing proppant by utilizing white mud. Background technique [0002] Fracturing proppant is a kind of solid particles widely used to support the fractures produced in the hydraulic fracturing process of oil and gas wells, enhance the conductivity of the formation, and increase the production of oil and gas. An ideal proppant should have the following characteristics: (1) high strength, and will not be crushed when used in deep well operations; (2) low relative density, easy to pump into the ground; (3) good chemical inertness, able to resist the water in the formation Erosion, also stable at high temperature; (4) good sphericity to maintain better gaps between proppant particles. [0003] Existing proppants are mainly divided into three types. There have been many literature and patent reports on t...

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): C09K8/80C08F2/44C08F120/14
CPCC08F2/44C08F220/14C08K3/34C08K9/04C08K9/06C09K8/80C08F212/36
Inventor 严春杰陈宇婷陈涛王义霞公衍生
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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