3D hydrophobic material for water plugging and preparation method thereof
A hydrophobic material, 3D technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problem that melamine sponge cannot block water, and achieve the effect of high oil absorption, less loss and good lipophilicity
Pending Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
Superhydrophobic modification of the surface of the melamine sponge can solve the problem that the melamine sponge cannot block water, and the crude oil can be squeezed out through multiple extrusions to realize the reuse of the melamine sponge
Method used
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Embodiment 1
[0026] 1. Material composition
[0027] A 3D hydrophobic material for water blocking in this embodiment is a melamine sponge modified by a silane modifier, and the silane modifier is a hydrolysis system formed by methyltrimethoxysilane and tetraethoxysilane in a hydrolyzate , the mass ratio of silane to hydrolyzate is 10:1; the mass ratio of methyltrimethoxysilane and tetraethoxysilane is 8:1~2:1; the hydrolyzate includes ethanol and water, and the ethanol and water The mass ratio is 9:1.
[0028] 2. Preparation method
[0029] A preparation method of 3D hydrophobic material for water blocking:
[0030] S0) Clean the melamine sponge
[0031] Prepare ethanol and water to make a cleaning agent with an ethanol mass fraction of 80%, and heat it to 60°C, then put the melamine sponge into the cleaning agent, put it into an ultrasonic instrument, and ultrasonicate for 20 minutes, and the ultrasonic The melamine sponge is dried in a vacuum oven to obtain a cleaned melamine sponge;...
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Abstract
The invention provides a 3D hydrophobic material for water shutoff and a preparation method thereof. The 3D hydrophobic material for water shutoff is prepared from the following raw materials: melamine sponge, methyltrimethoxysilane, tetraethoxysilane and hydrolysate. The preparation method comprises the following steps: S1) adding methyltrimethoxysilane and tetraethoxysilane into a hydrolysis system prepared from ethanol and water, and hydrolyzing at room temperature for 24-36 hours; s2) immersing the cleaned melamine sponge into a hydrolysis system for 20 to 60 minutes; then taking out the melamine sponge, and extruding to discharge hydrolysate; s3) treating the soaked melamine sponge at the temperature of 125 DEG C to 130 DEG C for 1 to 2 hours, so as to obtain the super-hydrophobic melamine sponge modified by the silane modifier; s4) crushing the prepared melamine sponge into particles with the particle size of not more than 10 [mu] m at a low temperature through a crushing method; the crushing temperature of the melamine sponge is-40 to 30 DEG C. The hydrophobicity is obviously improved, and the modified melamine sponge has ultrahigh oil absorption capacity and ultrahigh hydrophobicity.
Description
technical field [0001] The invention relates to the technical field of plugging agents for oil and gas fields, in particular to a 3D hydrophobic material for water plugging and a preparation method thereof. Background technique [0002] The water outlet position of fractured-vuggy sidetracking in carbonate rock is difficult to predict, the water plugging string cannot enter the open hole section, and it is difficult for the plugging agent to spread in the reservoir. Therefore, the selectivity of the plugging agent is particularly important. [0003] Foam or sponge is an inexpensive and commercially available material with a micron-sized three-dimensional porous framework. Common foams are polyurethane foam and melamine foam. Foam without any treatment can be wetted and cannot block water; it is difficult to desorb after adsorption and has poor recyclability, so foam or sponge cannot be used as an economical large-scale crude oil adsorption material. Contents of the invent...
Claims
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IPC IPC(8): C08J9/40C09K8/502C09K8/82C08L61/28
CPCC08J9/40C09K8/502C09K8/82C08J2361/28
Inventor 赵海洋马淑芬李亮任波伍亚军刘广燕郭娜张潇焦保雷张园秦飞刘磊黄明良闫科举刘毅
Owner CHINA PETROLEUM & CHEM CORP