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Cationic-nonionic alcohol ether glycoside type drag-reducing agent

An alcohol ether glycoside and non-ionic technology, which is applied in the preparation of sugar derivatives, sugar derivatives, sugar derivatives, etc., can solve the problems of single function, loss of efficacy, adsorption and separation, etc.

Active Publication Date: 2019-07-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are the following defects: In addition to strong alkali damage the formation and polymers are easy to block the formation, there is also a common problem in the compound system: when the compound system is injected into the formation, due to the different adsorption and migration laws of different molecules in the formation, it is easy to occur Separation by adsorption, thus losing efficacy
[0005] In the Chinese patent applications with publication numbers CN1451842, CN105154051A, CN101538461, CN106010495A, CN106467732A, CN102690640A and CN104371689A, the disclosures are mainly compound systems for reducing interfacial tension, with a single function

Method used

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  • Cationic-nonionic alcohol ether glycoside type drag-reducing agent
  • Cationic-nonionic alcohol ether glycoside type drag-reducing agent
  • Cationic-nonionic alcohol ether glycoside type drag-reducing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: prepare two kinds of drag reducers: Type I (its structural formula is as image 3 shown), type II (its structural formula is as Figure 4 shown). The preparation methods are respectively:

[0038] Take 0.2mol of epichlorohydrin and 0.2mol of alkyl tertiary amine, add 70ml of acetone as solvent, react at 28°C for 24h, place in refrigerator to crystallize and precipitate crystals, wash with ether to obtain glycidyl dimethyl chloride Ammonium. Take 0.1mol of epoxypropyl dimethyl ammonium chloride and place it in a three-necked flask, add 0.2mol of alkyl glycoside (to obtain type I drag reducer after reaction) or 0.2mol of alcohol ether glycoside (to obtain type II drag reducer after reaction) ), adjust the pH value to 10-11, and react at 80°C for 48h to obtain the product. Wherein the alkyl glucoside and the alcohol ether glycoside were both purchased from Jiangsu Wanqi).

[0039] For the above two drag reducers, the type I drag reducer (R 1 =-C 4 h 9...

Embodiment 2

[0042] Example 2: Adaptability of drag reducer to crude oil

[0043] In the experiment, crude oil from 7 blocks in Shengli Oilfield was selected to test the oil-water interfacial tension between different surfactant solutions / crude oil. The results are as follows Figure 5 As shown, it is found that the interfacial tensions of type I and type II drag reducers are all concentrated around 0, while cationic surfactants, dodecyl betaine, and petroleum sulfonate have strong selectivity to crude oil. During the test, the interfacial tension of oil and water is quite different.

Embodiment 3

[0044] Example 3: Ability of Drag Reducer to Neutralize Negative Charges on Rock Surface

[0045] (1) Zeta potential test: test with a zeta potential meter. Take 0.1g of sandstone respectively, add 25mL of surfactant aqueous solution with different concentrations (surfactant solution is prepared with 10000mg / L standard brine), shake in a constant temperature oscillator for 24h, take the upper suspension to measure zeta potential, the experimental condition is normal temperature, PH=7, mineralization degree 10000mg / L.

[0046] The result is as Image 6 Shown, the drag reducer of the present invention (R 1 =-C 8 h 17 , R 2 =-(CHOCHO) 3 C 12 h 25 ) can neutralize the negative charge on the rock surface and eliminate the electric double layer, and the effect is better than BS-12, OP-10, SDBS.

[0047] (2) Anti-swelling efficiency test: Weigh 1g (accurate to 0.01g) of bentonite (3 parts), put it into three centrifuge tubes, add drag reducer solution, distilled water and ke...

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Abstract

The invention discloses a cationic-nonionic alcohol ether glycoside type drag-reducing agent. The structural formula of the drag-reducing agent is shown in Fig. 1, wherein X<-> is Cl<->, Br<->, or I<->, the carbon atom number in R<1> is 1-18, and R<1> is selected from one of the following groups: substituted or non-substituted alkyl groups, substituted or non-substituted aromatic groups, substituted or non-substituted aralkyl groups, substituted or non-substituted hydroxyalkyl groups, substituted or non-substituted ester groups, substituted or non-substituted amide groups, and substituted or non-substituted haloalkyl groups. Preferably, R<1> is -C<n>H<2n+1> (n=1-18), and R<2> is -C<k>H<2k+1>(CH2CH2CH2O)<m>(CH2CH2O)<n>, wherein k is an integer of 8-18, and m, n is an integer of 0-10. The drag reducing agent can reduce the oil-water interfacial tension to be 10<-3> mN / m and can adsorb on the rock surface, the drag can be reduced by film-forming, and thus the adaptability of the drag reducing and injection increasing system to the reservoir is greatly improved. The drag reducing agent can also play the role of low interfacial tension to reduce the capillary resistance after being injected into the formation.

Description

technical field [0001] The invention relates to a cationic-nonionic alcohol ether glycoside type drag reducer, in particular to one that can not only reduce the water injection pressure of water injection wells, but also protect reservoirs from rising subsequent water injection pressures, and can improve the development effect of water flooding reservoirs The drag reducer belongs to the technical field of oilfield water injection development. Background technique [0002] Low permeability reservoirs are the main position for increasing oil production in Shengli Oilfield. However, there are problems of high water injection pressure and difficult water injection in the process of water flooding development of low permeability reservoirs. Analyzing the cause of the problem, it is mainly caused by the obvious boundary layer effect and capillary resistance in low permeability reservoirs. In order to reduce the water injection pressure and increase the water injection capacity o...

Claims

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Application Information

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IPC IPC(8): C09K8/584C09K8/58C07H15/04C07H15/08C07H1/00
CPCC07H1/00C07H15/04C07H15/08C09K8/58C09K8/584C09K2208/28
Inventor 王增林渠慧敏马珍福汪庐山罗杨韩蕊戴群韦良霞咸国旗王鹏
Owner CHINA PETROLEUM & CHEM CORP
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