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

Temperature-resistant reinforcing agent and fracturing fluid

A technology of reinforcing agent and fracturing fluid, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of poor temperature resistance and achieve the effects of low residue content, complete gel breaking and low damage in the system

Pending Publication Date: 2022-01-18
SINOPEC SSC +2
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthetic polymer thickener is mainly composed of polyacrylamide, and its temperature resistance is higher than that of vegetable glue. However, due to the poor temperature resistance due to monomer selection, synthesis process and other conditions, the formed polymer fracturing fluid has a high temperature resistance. Ability is still limited

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
  • Temperature-resistant reinforcing agent and fracturing fluid
  • Temperature-resistant reinforcing agent and fracturing fluid
  • Temperature-resistant reinforcing agent and fracturing fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The preparation of embodiment 1 temperature-resistant enhancer

[0060] Ethylene glycol, sodium thiosulfate, succinic anhydride, and distilled water are mixed in the water at a mass ratio of 1:6:2:10 and heated for compounding to obtain a temperature-resistant enhancer with a density of 1.137 g / cm 3 ; The compounding temperature is 35° C., and the time is 1 hour.

Embodiment 2

[0061] The preparation of embodiment 2 temperature-resistant enhancer

[0062] Methanol, sodium thiosulfate, maleic anhydride, and distilled water are mixed in the water at a mass ratio of 1:7:3:10 and heated for compounding to obtain a temperature-resistant enhancer with a density of 1.137g / cm 3 ; The compounding temperature is 40° C., and the time is 0.5 hours.

Embodiment 3

[0063] Example 3 160°C temperature resistance test

[0064] Preparation of base liquid: under stirring conditions, add 5g of polymer thickener to 1000mL of water, add 5.5g of clay stabilizer, then add 7g of drainage aid and 5g of demulsifier in turn, stir continuously for 10min, and put it in a water bath at 30°C , placed at constant temperature for 4h to fully swell, and the viscosity was 49mPa·s.

[0065] Blank group: take 60mL of base fluid, add 0.35g of cross-linking agent into the base fluid drop by drop evenly, mix well to form fracturing fluid, and test its rheological properties by RS6000 rheometer (160°C, 170S -1 , 90min), the result is as follows figure 1 (light gray curve).

[0066] Test group: Take 60mL of base fluid, add 0.48g of temperature-resistant enhancer (prepared in Example 1), stir evenly, add 0.35g of cross-linking agent into the base fluid drop by drop, mix evenly to form high-temperature fracturing fluid, and pass through RS6000 flow The rheology was...

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 relates to the technical field of oil and gas reservoir fracturing yield increase, and provides a temperature-resistant reinforcing agent and a fracturing fluid. The temperature-resistant reinforcing agent comprises a heat stabilizer and a deoxidant, wherein the heat stabilizer is selected from one or more of small molecular alcohol and amine compounds, and the deoxidant is selected from one or more of thiosulfate, sulfite, vitamin C and thiourea. The temperature-resistant reinforcing agent provided by the invention can delay degradation of a polymer thickening agent at high temperature so as to form a high-temperature polymer fracturing fluid system. According to the invention, the polymer thickening agent and the cross-linking agent which are higher in temperature resistance are screened, and the temperature-resistant reinforcing agent which is compatible with the polymer thickening agent and the cross-linking agent is prepared, so that the probability of fracturing fluid degradation caused by high temperature is reduced; and on the basis of ensuring the performance of the fracturing fluid, the use concentration of the thickening agent in the fracturing fluid system is reduced, the residue content of the system is low, gel breaking is thorough, flowback is easy, and damage to support fractures and reservoirs is small.

Description

technical field [0001] The invention relates to the technical field of oil and gas reservoir fracturing stimulation, in particular to a temperature-resistant enhancer that can be used in a high-temperature fracturing fluid system and the fracturing fluid prepared therefrom. Background technique [0002] With the continuous deepening of exploration and development of oil and gas fields at home and abroad, reservoirs characterized by deep layers, high temperature and low permeability have become the focus of oil and gas reservoir transformation. For example, in areas such as the Gulf of Mexico and the North Sea, the well depth exceeds 9000m, the formation pressure exceeds 140MPa, the geothermal gradient reaches 4°C / 100m, and the bottom hole temperature exceeds 200°C; The middle well area of ​​Qijita is a typical ultra-deep, ultra-high-temperature and high-pressure oil and gas reservoir with a buried depth of 6300m-8200m, a temperature as high as 222°C, and a bottomhole extensi...

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
IPC IPC(8): C09K8/68C09K8/86C09K8/88
CPCC09K8/665C09K8/68C09K8/685C09K8/845C09K8/86C09K8/882C09K8/885C09K8/887C09K2208/26
Inventor 施建国肖兵范明福郭粉娟庞清鹏胡娅娅
Owner SINOPEC SSC
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