Anti-swelling and swelling shrinkage agent and preparation method thereof

A technology of anti-expansion and shrinkage agent and concentration, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem that the hydration expansion effect of clay cannot be satisfactory, and achieve strong field applicability and good effect Effect

Inactive Publication Date: 2014-12-17
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of this, the existing clay inhibitors can not achieve a satisfactory effect on preventing the hydration swelling of clay.

Method used

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  • Anti-swelling and swelling shrinkage agent and preparation method thereof
  • Anti-swelling and swelling shrinkage agent and preparation method thereof
  • Anti-swelling and swelling shrinkage agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Anti-expansion effect experiment: deploy anti-expansion shrinkage agent according to the formula given in the summary of the invention, and then dilute it into three samples with mass concentrations of 1%, 1.5% and 2%, respectively, and then according to the aforementioned centrifugation method for anti-expansion rate Obtain the anti-swelling experimental data of the anti-swelling and shrinking agent of different concentrations, see Table 1 for details:

[0039] Table 1 is the anti-expansion experiment data of the anti-shrink expansion agent of different concentrations

[0040]

[0041] It can be seen from the above table that with the increase of the amount of anti-swelling agent, the anti-swelling effect on clay also has a more obvious increase. When the experimental concentration increased to 2%, the anti-swelling rate reached 88.06%, and the anti-swelling effect was good. In practice, considering the anti-expansion effect and cost requirements, the recommended ...

Embodiment 2

[0043] Prepare three samples according to the method of Example 1, and obtain the shrinkage experimental data of the anti-expansion shrinkage agent of different concentrations according to the aforementioned centrifugal determination method of shrinkage shrinkage ratio, specifically see Table 2:

[0044] Table 2 is the experimental data of shrinkage and expansion effect of anti-expansion shrinkage agent recorded by centrifugal method

[0045]

[0046] It can be seen from the above table that with the increase of the amount of anti-shrink expansion agent, the shrinkage effect of clay also has a more obvious increase. When the experimental concentration is increased to 2%, the shrinkage and expansion rate reaches 35.8%. In practice, considering the anti-shrinkage effect and cost requirements, it is recommended to use a concentration of 2%.

Embodiment 3

[0048] Carry out clay in clear water and add the expansion situation comparative experiment in the water of anti-swelling agent of the present invention, experiment selects ZNP-1 type expansion measuring instrument for use, wherein the expansion dynamic data of clay in clear water is shown in Table 3:

[0049] Table 3 Dynamic data of clay swelling in clear water

[0050]

[0051] The dynamic data of the expansion of clay in the water that adds anti-shrinkage and anti-expansion agent of the present invention is shown in Table 4:

[0052] Table 4 The dynamic data of clay swelling in water with anti-shrinkage and anti-swelling agent

[0053]

[0054] attached figure 1 It is an intuitive description of Table 3 and Table 4. It specifically shows that as time goes on, the expansion law of clay particles in the maintenance of clear water and anti-swelling and shrinking agent solution. It is not difficult to see from the chart that the expansion height is obviously reduced. ...

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Abstract

The invention discloses an anti-swelling swelling shrinkage agent and a preparation method thereof, and solves the problem that the existing clay inhibitor cannot have anti-swelling and swelling shrinkage properties at the same time. The anti-swelling and swelling shrinkage agent provided by the invention is composed of 65ml of 30% hydrochloric acid, 100ml of 33% trimethylamine solution, 0.5g of a cetyl trimethyl ammonium bromide solid and 45g of an epoxy chloropropane liquid. The anti-swelling and swelling shrinkage agent not only has inhibiting effect on the expansion of clay, but also can shrink the expanded clay particles, so as to effectively improve the permeability of an oil reservoir.

Description

technical field [0001] The invention relates to an oilfield additive used in the process of increasing production and injection in an oil field and a preparation method thereof, in particular to a clay inhibitor used in the process of water injection. Background technique [0002] The oil reservoir is usually a sandstone formation, which contains a large amount of clay. The injection of external water will cause the hydration expansion of the clay minerals in the oil reservoir and the dispersion and migration of the clay minerals, thereby blocking the rock pores and channels and making the reservoir seepage The rate decreases, the water injection pressure increases, the oil recovery rate decreases, and the oil recovery rate decreases. For this reason, clay inhibitors need to be used to control the expansion of clay during oil field production, but the existing clay inhibitors either have certain anti-swelling properties, which can prevent the expansion of clay to a certain e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/58
CPCC09K8/58C09K2208/12
Inventor 王继刚冯浦涌杨永庆范振忠胡洪福刘庆旺范炜昊
Owner NORTHEAST GASOLINEEUM UNIV
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