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

A water-soluble temporary plugging agent suitable for secondary fracturing and its preparation method

A technology of secondary fracturing and temporary plugging agent, applied in the direction of chemical instruments and methods, drilling composition, etc., can solve the problems of limited influence, rising water content of construction wells, etc., to achieve enhanced plugging ability and mild reaction conditions , The effect of facilitating large-scale industrial production

Active Publication Date: 2021-10-01
SOUTHWEST PETROLEUM UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Turning to refracturing technology overcomes the limitations of conventional refracturing technology. Conventional refracturing technology can only reopen old fractures and restore the conductivity of old fractures, but the impact on the displacement area of ​​injected water Extremely limited, if the expansion of fracturing scale is adopted for oilfields in the medium-high water-cut development period, the water cut of construction wells after fracturing may rise sharply

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 water-soluble temporary plugging agent suitable for secondary fracturing and its preparation method
  • A water-soluble temporary plugging agent suitable for secondary fracturing and its preparation method
  • A water-soluble temporary plugging agent suitable for secondary fracturing and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of a water-soluble temporary plugging agent suitable for secondary fracturing, the steps are as follows:

[0021] S1. The raw material components were weighed according to the following mass percentages: 55% polylactic acid, 20% carboxymethyl guar gum, 15% butyl rubber powder, 7% bentonite, and 3% perfluorocetyl ammonium chloride.

[0022] S2. Add polylactic acid into a vacuum kettle, heat to 90°C, and keep the temperature constant. After the polylactic acid is softened, add carboxymethyl guar gum, and stir to mix evenly.

[0023] S3. Add fluorocarbon surfactant to the mixed material in step S1, and mix evenly; then add butyl rubber powder and bentonite, and stir for 2 hours.

[0024] S4. After the reaction is completed, cool and solidify, and pulverize to obtain a water-soluble temporary plugging agent.

Embodiment 2

[0026] A preparation method of a water-soluble temporary plugging agent suitable for secondary fracturing, the steps are as follows:

[0027] S1. The raw material components were weighed according to the following mass percentages: 65% polylactic acid, 21% carboxymethyl guar gum, 10% high-styrene styrene-butadiene rubber powder, 3% bentonite, and 1 perfluorohexadecyl ammonium chloride. %.

[0028] S2. Add polylactic acid into a vacuum kettle, heat to 95° C., and keep the temperature constant. After the polylactic acid is softened, add carboxymethyl guar gum, and stir to mix evenly.

[0029] S3. Add fluorocarbon surfactant to the mixed material in step S1, and mix evenly; then add high-styrene styrene-butadiene rubber powder and bentonite, and stir for 2 hours.

[0030] S4. After the reaction is completed, cool and solidify, and pulverize to obtain a water-soluble temporary plugging agent.

Embodiment 3

[0032] A preparation method of a water-soluble temporary plugging agent suitable for secondary fracturing, the steps are as follows:

[0033] S1. The raw material components are weighed according to the following mass percentages: 60% polylactic acid, 25% carboxymethyl guar gum, 11% mixture of butyl rubber powder and high styrene butadiene rubber powder by mass ratio, 3% bentonite, Perfluorocetyl ammonium chloride 1%.

[0034] S2. Add polylactic acid into a vacuum kettle, heat to 95° C., and keep the temperature constant. After the polylactic acid is softened, add carboxymethyl guar gum, and stir to mix evenly.

[0035] S3. Add a fluorocarbon surfactant to the mixed material in step S1, and mix evenly; then add a mixture of butyl rubber powder and high-styrene-styrene-butadiene rubber powder in an equal mass ratio, and bentonite, and stir for 2 hours.

[0036] S4. After the reaction is completed, cool and solidify, and pulverize to obtain a water-soluble temporary plugging ag...

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 discloses a water-soluble temporary plugging agent suitable for secondary fracturing, which is made of the following raw material components in mass percentage: polylactic acid 55-65%, carboxymethyl guar gum 20-25%, rubber powder 10-15%, bentonite 3-8%, fluorocarbon surfactant 0.5-3%. The rubber powder is butyl rubber powder or high styrene butadiene rubber powder. The preparation method of the water solvent temporary plugging agent: add polylactic acid into a vacuum kettle, heat to 85-95°C, keep the temperature constant, after the polylactic acid softens, add carboxymethyl guar gum, stir and mix evenly; add Fluorocarbon surfactant, mix evenly; then add rubber powder and bentonite, stir and react for 2 hours; after the reaction, cool and solidify, crush to obtain a water-soluble temporary plugging agent. Comparing performance with the conventional temporary plugging agent of the same type, the plugging strength, adhesion performance, and suspension stability of the water-soluble temporary plugging agent of the present invention are all higher than those of the conventional temporary plugging agent, which can meet the requirements of on-site construction.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a water-soluble temporary plugging agent suitable for secondary fracturing and a preparation method thereof. Background technique [0002] Since the 1990s, with the application of turning to refracturing technology in major oilfields, the research on temporary plugging agents for fracturing has also become a hot spot of attention. Turning to refracturing technology overcomes the limitations of conventional refracturing technology. Conventional refracturing technology can only reopen old fractures and restore the conductivity of old fractures, but the impact on the displacement area of ​​injected water Extremely limited, if the expansion of fracturing scale is adopted for oilfields in the medium-high water-cut development period, the water cut of construction wells after fracturing may rise sharply. Temporary plugging and refracturing technology is to add te...

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): C09K8/512C09K8/514C09K8/68C09K8/88C09K8/90
CPCC09K8/512C09K8/514C09K8/68C09K8/685C09K8/887C09K8/905
Inventor 王世彬胡鹏石磊赵峰刘嘉文高杨刘城成郭建春
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