Polymer-ionic liquid compounded clay stabilizer and synthesis method thereof

A technology of composite clay and synthesis method, which is applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems of reducing the relative permeability of oil and gas phase, cannot produce multi-point adsorption, cannot be widely used, etc., and achieves inhibition of hydration. Swelling, good viscosity retention, water solubility enhancement effect

Inactive Publication Date: 2014-02-05
SOUTHWEST PETROLEUM UNIV
View PDF4 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main advantage of this type of clay stabilizer is that it is cheap and easy to get, but it is not resistant to erosion, and it cannot produce multi-point adsorption, so it cannot be widely used (E.S.Boek, P, V, Coveney, N.T. Skipper. Monte Carlo Molecular Modeling Studies of Hydrated Li + , Na + , and K + Smectites: Understanding the Role of Potassium as a Clay Swelling Inhibitor[J].J.Am.Chem.Soc.,1995,117(50):12608-12617; Penner D, Ladaly G.Influence of Organic and Inorganic Salts on the Coagulation of Montmorillonite Dispersions [J]. Clays and Clay Minerals, 2000, 48 (2): 246-255.); (2) Cationic surfactant: it has strong adsorption and can resist water washing, but it will make the reservoir It is lipophilic and reduces the relative permeability of the oil-gas phase, so it cannot be used as an effective clay stabilizer (JhonK.Borchardt, Duncan, Okla.Methods of minimizing fines migration in subterranean formations.US4536304,1985(02)); (3 ) organic cationic polymer: mainly quaternary ammonium salt type

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
  • Polymer-ionic liquid compounded clay stabilizer and synthesis method thereof
  • Polymer-ionic liquid compounded clay stabilizer and synthesis method thereof
  • Polymer-ionic liquid compounded clay stabilizer and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Polymer-ionic liquid complex AA / AM / DMAAPA-[EMIM]BF 4 Synthesis

[0021] (1) Add 0.03g DMAAPA, 6.97g AM, and 3.00g AA into a 250mL three-necked flask to form an aqueous solution with a total mass concentration of monomers of 20%, adjust the pH to 7 with NaOH (2M), and inject N 2 20min; Add initiator ammonium persulfate-sodium bisulfite then, its mol ratio is 1:1, and initiator add-on is 0.3% of total monomer mass, continues to pass into N 2 10-20min, and react at a temperature of 45°C for 8h; finally wash three times with absolute ethanol, pulverize, and dry to obtain the ternary polymer AA / AM / DMAAPA.

[0022](2) Get newly steamed 1-methylimidazole and bromoethane each 0.05mol to be dissolved in 50mL n-heptane, join in the three-necked flask successively, under N 2 Under a protective atmosphere, heat to 80°C and stir to reflux. After 18 hours, remove the reaction device and cool to room temperature. The light yellow viscous liquid in the lower layer was tak...

Embodiment 2

[0024] Example 2: Polymer-ionic liquid complex AA / AM / DMAAPA-[EMIM]BF 4 Infrared Spectroscopy Characterization of

[0025] The polymer-ionic liquid complex AA / AM / DMAAPA-[EMIM]BF synthesized by Example 1 4 The infrared spectrum is shown in 1. Comparison of polymer AA / AM / DMAAPA and polymer-ionic liquid complex AA / AM / DMAAPA-[EMIM]BF from the figure 4 , it can be seen that at 3300cm -1 There are strong amino stretching vibration absorption peaks on the left and right, 2915cm -1 、2850cm -1 There are vibration absorption peaks of methylene on the left and right, 1650cm -1 Left and right are the absorption peaks of carbonyl, 1100cm -1 is the stretching vibration absorption peak of the phosphorus-oxygen double bond; but by comparison, it can be seen that the polymer-ionic liquid complex AA / AM / DMAAPA-[EMIM]BF 4 at 3158cm -1 、3108cm -1 Double peaks appear at , which is caused by the stretching vibration absorption of the ethyl group on the imidazole ring, 1182cm -1 is the absor...

Embodiment 3

[0026] Example 3: Polymer-ionic liquid complex AA / AM / DMAAPA-[EMIM]BF 4 Temperature resistance investigation

[0027] The temperature resistance of the samples synthesized in Example 1 was investigated. The prepared polymer-ionic liquid complex AA / AM / DMAAPA-[EMIM]BF 4 Prepare an aqueous solution of 1100 mg / L, measure the apparent viscosity change of the polymer aqueous solution at a temperature of 30-120 °C, and compare it with the aqueous solution of the terpolymer AA / AM / DMAAPA with a mass concentration of 1000 mg / L. The data Such as figure 2 shown. From figure 2 It can be found that the apparent viscosity of the polymer-ionic liquid complex aqueous solution and the terpolymer aqueous solution gradually decreases with the increase of temperature. When the temperature increased to 120 °C, the polymer-ionic liquid complex AA / AM / DMAAPA-[EMIM]BF 4 The apparent viscosity of the terpolymer AA / AM / DMAAPA is 36.1mPa·s, and the viscosity retention rate reaches 51.8%, and the vis...

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
shear viscosityaaaaaaaaaa
shear viscosityaaaaaaaaaa
shear viscosityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a polymer-ionic liquid compounded clay stabilizer and a synthesis method thereof. The method comprises the following steps of copolymerizing (1-dimethylamino)-allyl phosphate containing phosphoric groups, acrylic acid and acrylamide, so as to obtain a terpolymer AA/AM/DMAAPA, preparing 100mL of aqueous solution with the mass concentration of 10,000mg/L from the AA/AM/DMAAPA, putting into a 250mL round-bottomed flask, adding 0.3g of ionic liquid [EMIM]BF4, introducing N2 for 10-20 minutes, carrying out reflux reaction for 2-4 hours at the temperature of 50 DEG C, and after the reaction is ended, carrying out reduced-pressure distillation on a reaction solution at the temperature of 50 DEG C until a gelatinous product is produced; drying the product in a baking oven with the temperature of 60 DEG C for 12 hours, thereby obtaining a polymer-ionic liquid compound AA/AM/DMAAPA-[EMIM]BF4. The polymer-ionic liquid compounded clay stabilizer synthesized by the method is intended to be applied to oilfield development and is used for inhibiting the hydrated expansion of clay.

Description

technical field [0001] The invention relates to a polymer-ionic liquid compound used as a clay stabilizer in the petroleum industry and a synthesis method thereof. technical background [0002] With the continuous exploration and development of oil fields, the protection of reservoirs is becoming more and more important. Clay minerals widely exist in oil reservoirs. If proper measures are not taken during the development process, hydration expansion and dispersion migration of clay minerals will be caused, pores and channels will be blocked, permeability will be reduced, and reservoirs will be damaged. To mitigate damage to the reservoir, chemical treatments must be used to stabilize the clay minerals in the formation. [0003] At present, the commonly used clay stabilizers at home and abroad roughly contain the following categories (J.Swenson, M.V.Smalley, H.L.M.Hatharasinghe, et al.Interlayer Structure of a Clay-Polymer-Salt-Water System.Langmuir[J].2001,17( 13):3813-381...

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 Applications(China)
IPC IPC(8): C08F220/56C08F220/06C08F230/02C08F8/44C09K8/575C09K8/44
Inventor 苟绍华杨成叶仲斌尹婷刘曼
Owner SOUTHWEST PETROLEUM UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap