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Microemulsion type flushing fluid for well cementation, and preparation method of microemulsion type flushing fluid

A technology of microemulsion and flushing fluid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of unsatisfactory oil flushing effect and wetting reversal effect, and limit the quality of cementing, etc., and achieve good application value and application prospects, improving cementing quality, and the effect of strong solubility

Inactive Publication Date: 2018-12-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a microemulsion type cementing flushing fluid and its preparation method, which overcomes the problems of conventional cementing flushing fluids, such as unsatisfactory oil flushing effect and unsatisfactory wetting reversal effect, which limit the improvement of cementing quality.

Method used

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Examples

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preparation example Construction

[0034] A preparation method of microemulsion type cementing flushing fluid is:

[0035] A. First fully dissolve chloride in water to prepare an aqueous chloride solution;

[0036] B, the oil is placed in the stirred tank, and the temperature of the control tank is at 24~26 ℃, then add sodium dodecyl benzene sulfonate, calcium alkyl sulfonate, alcohol and dodecyl trimethyl ammonium bromide successively in proportion , the stirring speed is controlled at 1500 ~ 1600r / min, stirring for 4h;

[0037] C, add chloride aqueous solution, control the adding speed of water ≤ 5m 3 / h, the stirring speed is controlled at 500 ~ 800r / min, and after stirring for 4 hours, it is allowed to stand for 0.5 ~ 2 hours, which is the microemulsion type cementing flushing fluid.

[0038] Embodiments of the present invention are as follows:

Embodiment 1

[0040] The microemulsion type cementing flushing fluid in this embodiment, in 100 parts by weight, consists of the following components:

[0041] Sodium dodecylbenzenesulfonate 2.40 parts by weight;

[0042] Calcium alkyl sulfonate 1.16 parts by weight;

[0043] 2.30 parts by weight of n-butanol;

[0044] 1.80 parts by weight of potassium chloride;

[0045] Dodecyltrimethylammonium bromide 2.40 parts by weight;

[0046] 48.10 parts by weight of white oil;

[0047] Water 41.84 parts by weight.

[0048] Its preparation method and steps are as follows:

[0049] A, first fully dissolve potassium chloride in water to prepare an aqueous chloride solution;

[0050] B, the white oil is placed in the stirred tank, and the temperature of the control tank is at 24~26 ℃, then add sodium dodecyl benzene sulfonate, calcium alkyl sulfonate, n-butanol and dodecyl trimethyl successively in proportion Ammonium bromide, the stirring speed is controlled at 1500-1600r / min, and the stirring ...

Embodiment 2

[0055] 2.42 parts by weight of sodium dodecylbenzenesulfonate;

[0056] Calcium alkyl sulfonate 1.17 parts by weight;

[0057] 2.29 parts by weight of amylbutanol;

[0058] 2.00 parts by weight of sodium chloride;

[0059] Dodecyltrimethylammonium bromide 2.42 parts by weight;

[0060] Diesel 48.30 parts by weight;

[0061] Water 41.40 parts by weight.

[0062] Its preparation method and steps are as follows:

[0063] A. First fully dissolve sodium chloride in water to prepare an aqueous chloride solution;

[0064] B, the diesel oil is placed in the stirred tank, and the temperature of the control tank is at 24~26 ℃, then add sodium dodecyl benzene sulfonate, calcium alkyl sulfonate, amyl butanol and dodecyl trimethyl bromide successively in proportion ammonium chloride, the stirring speed is controlled at 1500-1600r / min, and the stirring is performed for 4h;

[0065] C, add sodium chloride aqueous solution, control the adding speed of water ≤ 5m 3 / h, the stirring spe...

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Abstract

The invention discloses microemulsion type flushing fluid for well cementation in the petroleum industry, and a preparation method of the microemulsion type flushing fluid. In a well cementation construction process, the flushing fluid is injected before cement injection, so that the oil stain and mud cakes, which adhere to the well wall and the casing wall, can be quickly removed, the wettabilityof the well wall and the casing wall is changed, and the well cementation quality is improved. The microemulsion type flushing fluid for well cementation is prepared from sodium dodecylbenzene sulfonate, calcium alkyl sulfonate, alcohol, chloride, dodecyltrimethyl ammonium bromide, oil and water; the preparation method comprises the steps of firstly, fully dissolving the chloride in the water toprepare an aqueous solution of the chloride, and then placing the oil in a stirring kettle; sequentially adding the sodium dodecylbenzene sulfonate, the calcium alkyl sulfonate, the alcohol and the dodecyltrimethyl ammonium bromide in proportion at the kettle temperature of 24-26 DEG C and then stirring, adding the aqueous solution of the chloride, stirring, and then standing for 0.5-2 hours to obtain the flushing fluid for well cementation.

Description

technical field [0001] The invention relates to a pre-fluid for cementing construction in the petroleum industry, in particular to a microemulsion type cementing flushing fluid and a preparation method thereof. In the process of cementing construction, the flushing fluid is injected before the cement slurry is injected, which can quickly remove the oil dirt and mud cake adhering to the well wall and casing wall, change the wettability of the well wall and casing wall, and improve the Cementing quality. Background technique [0002] Flushing fluid is a pre-fluid in cementing construction. It is used before cementing and cementing. Flushing fluid is an important factor affecting the quality of cementing, which will directly affect the production effect and production cycle of oil wells. The influence of the flushing fluid on the cementing quality is mainly reflected in the following aspects: (1) the formation of an isolation slug between the cement slurry and the drilling flu...

Claims

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Application Information

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IPC IPC(8): C09K8/52
CPCC09K8/52
Inventor 郝金克侯业贵戴荣东田启忠于少卿陈丽媛王锴王健于滨惠伟
Owner CHINA PETROLEUM & CHEM CORP