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

A kind of high temperature resistant Pickering emulsion drilling fluid and preparation method thereof

A technology of Pickering emulsion and high temperature resistance, which is applied in the field of drilling fluid, can solve the problems that the pore size cannot be effectively measured or judged, the contribution is limited, and the resealing effect is probabilistic, etc., so as to improve the spatial structure and gel strength, The emulsion has good stability and the effect of solving difficult removal problems

Active Publication Date: 2022-07-08
SOUTHWEST PETROLEUM UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the field construction process, the mud cake formed by different drilling fluid systems or the same drilling fluid system under different temperature, pressure, and material addition conditions cannot effectively measure or distinguish the pore size in the network structure. Therefore, solid particles There is a probability of resealing on the mudcake network
The droplet plugging agent is mainly the Jiamin effect formed by the water droplets in the emulsion in the micro-fractures near the wellbore wall, but its contribution is limited in the system with a high oil-water ratio

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 high temperature resistant Pickering emulsion drilling fluid and preparation method thereof
  • A kind of high temperature resistant Pickering emulsion drilling fluid and preparation method thereof
  • A kind of high temperature resistant Pickering emulsion drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The present embodiment provides a preparation method of modified organic soil, and the steps are as follows:

[0060] Stir 1 part of sodium bentonite in 20 parts of deionized water for 1 hour, add 0.5 part of dioctadecyl amidopropyl trimethyl ammonium chloride, stir at 1000 rpm for 1 hour at a temperature of 40 ° C, and spin at 8000 rpm for centrifugation 30min. Then add 1 part of dioctadecyl amidopropyl trimethyl ammonium chloride, under the condition of temperature of 40 ℃, stir at 1000 rpm for 1 h, centrifuge at 10000 rpm for 20 min; Dry for 24 hours, grind, and sieve with a 200-mesh sieve to obtain modified organic soil.

Embodiment 2

[0062] The present embodiment provides a preparation method of modified organic soil, and the steps are as follows:

[0063] Stir 1 part of sepiolite in 20 parts of deionized water for 30 minutes, add 1 part of octadecyltrimethylammonium bromide, stir at 1000 rpm for 30 minutes at a temperature of 45°C, and centrifuge at 5000 rpm for 30 minutes. Then, 2 parts of dioctadecyltrimethylammonium bromide were added, and at a temperature of 45° C., the mixture was stirred at 1000 rpm for 6 h, and centrifuged at 5000 rpm for 30 min. The lower layer of sediment was taken out, ground and dispersed on a ball mill for 6 hours, dried at 100° C. for 24 hours, ground, and sieved with a 200-mesh sieve to obtain modified organic soil.

Embodiment 3

[0065] The present embodiment provides a preparation method of modified organic soil, and the steps are as follows:

[0066] Stir 1 part of attapulgite in 30 parts of deionized water for 2 hours, add 0.5 part of cetyl amidopropyl trimethyl ammonium bromide, stir at 800 rpm for 1 hour at a temperature of 45 ° C, and spin at 8000 rpm for centrifugation 15min. Then add 0.5 part of bis-dodecyl amidopropyl trimethyl ammonium bromide, stir at 800 rpm for 3 hours at a temperature of 45 ℃, spin at 8000 rpm for 10 min, take the lower layer of modified sediment and grind and disperse it on a ball mill for 0.5 h , dried at 90°C for 12 hours, ground, and sieved with a 200-mesh sieve to obtain modified organic soil.

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
diameteraaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a high temperature resistant Pickering emulsion drilling fluid and a preparation method thereof. The drilling fluid comprises a composition and a water phase, and the composition comprises by weight: oil phase: 30-70 parts; modified organic soil: 0.5-4 parts; amphiphilic nanomaterials: 0.1-4 parts; composite sealing Blocking agent; 0.5 to 3 parts; weighting material: 0 to 2000 parts. Using the synergistic effect of modified organic soil, amphiphilic nanoparticles and composite plugging agent, the temperature resistance can reach 100℃~240℃, and the density can be increased to 0.8~2.6g / cm 3 High temperature resistant Pickering emulsified drilling fluid. The drilling fluid has simple components, outstanding rheological properties, low oil-to-water ratio, no need to use molecular surfactants, flow regulators, etc., saving the dosage and cost of treatment agents by 30% to 50%; drilling fluids under high temperature and high density conditions It has stable performance, small filtration loss, outstanding rheological properties, good suspension stability, low filtration loss, good acid solubility of filter cake, and outstanding plugging performance.

Description

technical field [0001] The invention belongs to the technical field of drilling fluids, and in particular relates to a high temperature resistant Pickering emulsion type drilling fluid and a preparation method thereof. Background technique [0002] Pickering emulsion refers to an emulsion stabilized by colloidal-sized solid particles, and its stabilization mechanism is mainly that the solid particles adsorb on the oil-water interface and form a single-layer / multi-layer film of solid particles, thereby stabilizing the emulsion. Traditional emulsions stabilized by molecular surfactants or amphiphilic polymers are thermodynamically unstable systems, whereas emulsions stabilized by colloidal particles are ultrastable. In recent years, Pickering emulsions have been paid more and more attention by researchers because of their low cost, environmental friendliness and high stability. [0003] In the prior art, although nanomaterials can improve the stability of Pickering emulsions,...

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): C09K8/36
CPCC09K8/36C09K2208/10C09K2208/18
Inventor 刘鹭蒲晓林周研郭欣钰王琪
Owner SOUTHWEST PETROLEUM UNIV
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