Profile modification agent for epoxy resin emulsion

A technology of epoxy resin emulsion and profile control water blocking agent, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of poor selectivity and achieve suitable particle size, high viscosity and small particle size Effect

Inactive Publication Date: 2012-05-09
NORTHEAST GASOLINEEUM UNIV
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an epoxy resin emulsion profile control water blocking agent, which solves the problem of poor selectivity o

Method used

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  • Profile modification agent for epoxy resin emulsion
  • Profile modification agent for epoxy resin emulsion
  • Profile modification agent for epoxy resin emulsion

Examples

Experimental program
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[0024] 1. The optimized design of epoxy resin emulsion profile control and water shutoff agent formula:

[0025] 1. The establishment of epoxy resin concentration:

[0026] Because the concentration of epoxy resin is an important factor in whether the crosslinking system can form an emulsion, it is first necessary to establish the concentration of epoxy resin and measure the viscosity of the system after different concentrations of epoxy resin and acrylic acid are crosslinked for different times. Experimental data Such as figure 1 and figure 2 Shown.

[0027] by figure 1 and figure 2 Shown: after 1 hour of reaction, the viscosity of the cross-linking system increases with the increase of the epoxy resin concentration. When the epoxy resin concentration is greater than 600mg / L, there is no obvious shear thinning phenomenon. When the rate is very high, it shows the behavior of shear thickening. In the process of the reaction, the cross-linking system with epoxy resin concentration ...

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Abstract

The invention relates to a profile modification agent for an epoxy resin emulsion, which is used for solving the problem of poor selectivity of the conventional organic resin plugging agent. The profile modification agent for an acrylic monomer grafted epoxy resin emulsion is obtained by polymerizing epoxy resin with an acrylic monomer, neutralizing with N,N-dimethylethanolamine and emulsifying with deionized water, wherein the concentration of the epoxy resin in an emulsion system is 300-600 mg/L, the concentration of the N,N-dimethylethanolamine is 3,000-5,000 mg/L, and the crosslinking ratio is 10:1 or 20:1 or 40:1. When the profile modification agent is in use, a large quantity of gel particles of the emulsion enter large pore canals while a small quantity of or no gel particle enterssmall pore canals, the resistance coefficients of the large pore canals are increased, and the resistance coefficients of the small pore canals are increased at a lower frequency in comparison to thelarge pore canals, so that selective plugging can be realized; and moreover, the profile modification agent has high temperature resistance and high salt resistance, and the emulsion system is stable.

Description

technical field [0001] The invention relates to an oilfield additive used in the exploitation process of oilfields with high water cut period, in particular to a profile control and water shutoff agent. Background technique [0002] With the continuous development of the oil field, entering the stage of high water cut or ultra-high water cut water injection development, the contradictions in the plane, interlayer and intralayer of the oil layer become more prominent, and the injected water often breaks into the oil well along the high permeability layer, resulting in a decline in the productivity of the oil well, which seriously affects the water flooding development effect, thereby affecting the oil recovery efficiency of the oil field. In order to solve this problem, people usually adopt the method of shutting off water during the period of high water content. The key of the method is to use the corresponding shutoff agent according to different environments. [0003] Th...

Claims

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Application Information

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IPC IPC(8): C08F283/10C08F220/06C09K8/42C09K8/588
Inventor 刘庆旺范振忠王继刚万家瑰娄艳敏叔贵新赵恒
Owner NORTHEAST GASOLINEEUM UNIV
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