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Anionic-nonionic composite efficient flushing fluid and preparation method thereof

A non-ionic, flushing liquid technology, applied in chemical instruments and methods, drilling compositions, etc., to achieve good flushing efficiency, good compatibility, and the effect of promoting flushing effect

Active Publication Date: 2015-09-16
成都欧美克石油科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The exploration and development of oil and gas fields are gradually developing towards deep wells, ultra-deep wells, and wells in complex formations. Conventional oil-based mud flushing fluids can no longer meet the cementing requirements. Flushing fluids with good thermal stability and good flushing effects under high temperature conditions must be used

Method used

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  • Anionic-nonionic composite efficient flushing fluid and preparation method thereof
  • Anionic-nonionic composite efficient flushing fluid and preparation method thereof
  • Anionic-nonionic composite efficient flushing fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] [Example 1] Anion-nonionic composite high-efficiency flushing solution, which is prepared from the following raw materials in mass percentage:

[0028]

[0029] The anion-nonionic composite high-efficiency flushing fluid also includes 0.5 g of a silicon ether copolymerized defoamer.

[0030] The preparation method of anion-nonionic composite high-efficiency flushing liquid, it comprises the following steps:

[0031] S1. Weigh the required mass percentage of raw materials, and heat the required water to 45°C;

[0032] S2. Add sodium tripolyphosphate and stir at 800 rpm for 20 minutes to fully dissolve it;

[0033] S3. Add polyoxyethylene sorbitan fatty acid ester, fatty alcohol polyoxyethylene ether sodium sulfate and nonylphenol polyoxyethylene ether to the solution obtained in step S2 and stir at 800 rpm for 80 minutes, and finally prepare Add silicon ether copolymerization defoamer to the solution and stir evenly. The prepared rinsing solution was mixed with wat...

Embodiment 2

[0034] [Example 2] Anion-nonionic composite high-efficiency flushing solution, which is prepared from the following raw materials in mass percentage:

[0035]

[0036] The anion-nonionic composite high-efficiency flushing fluid also includes 0.8 g of a silicone ether copolymerized defoamer.

[0037] The preparation method of anion-nonionic composite high-efficiency flushing liquid, it comprises the following steps:

[0038] S1. Weigh the required mass percentage of raw materials, and heat the required water to 50°C;

[0039] S2. Add sodium tripolyphosphate and stir at 1000 rpm for 25 minutes to fully dissolve it;

[0040] S3. Add polyoxyethylene sorbitan fatty acid ester, fatty alcohol polyoxyethylene ether sodium sulfate and nonylphenol polyoxyethylene ether to the solution obtained in step S2 and stir for 100 minutes at 1000 rpm, and finally prepare Add silicon ether copolymerized antifoaming agent into the solution and stir evenly, and prepare the rinse solution into 1...

Embodiment 3

[0041] [Example 3] Anion-nonionic composite high-efficiency flushing solution, which is prepared from the following raw materials in mass percentage:

[0042]

[0043] The anion-nonionic composite high-efficiency flushing fluid also includes 1.0 g of a silicone ether copolymerized defoamer.

[0044] The preparation method of anion-nonionic composite high-efficiency flushing liquid, it comprises the following steps:

[0045] S1. Weigh the required mass percentage of raw materials, and heat the required water to 55°C;

[0046] S2. Add sodium tripolyphosphate and stir at 1200rpm for 30 minutes to fully dissolve it;

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PUM

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Abstract

The invention discloses an anionic-nonionic composite efficient flushing fluid and a preparation method thereof. The flushing fluid comprises, by mass, 6-10% of polyoxyethylene sorbitan fatty acid ester, 10-15% of fatty alcohol polyoxyethylene ether sodium sulfate, 6-10% of polyoxyethylene nonyl phenyl ether, 3-6% of sodium tripolyphosphate, 0.5-1.0% of an antifoaming agent, and the balance of water. The preparation method of the flushing fluid comprises the following steps: preheating water; adding sodium tripolyphosphate, and stirring for 20-30min to fully dissolve sodium tripolyphosphate; and adding polyoxyethylene sorbitan fatty acid ester, fatty alcohol polyoxyethylene ether sodium sulfate and polyoxyethylene nonyl phenyl ether, stirring under 800-1200rmp for 80-100min, and adding the polysiloxane antifoaming agent. The polysiloxane antifoaming agent can resist acids, alkali and inorganic salts, and can promote the flushing effect of the flushing fluid; the flushing fluid can be used in a temperature range of 25-160DEG C, and has a good flushing effect; the flushing fluid has good compatibility with oil base mud and water mud; and the flushing fluid has good stability, and can adapt to high temperature, high salinity and other environments.

Description

technical field [0001] The invention relates to an anion-nonionic composite high-efficiency flushing fluid, whose main function is to dilute and disperse the drilling fluid, prevent the flocculation and gelation of the drilling fluid or cement slurry, effectively flush the loose mud cake on the well wall and the casing, and improve the The bonding strength of the first cementing surface and the second cementing surface of the cement sheath can be improved, thereby improving the cementing quality. Background technique [0002] Before cement injection, flushing fluid is generally used for well flushing to wash away the residual drilling fluid adhering to the casing and the well wall to improve the cementing quality. Oil-based mud has the advantages of low fluid loss and low damage. It is widely used in drilling in oil and gas fields. The disadvantage is that the mud remaining in the casing and the formed filter cake are difficult to remove, which seriously affects the cementin...

Claims

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Application Information

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IPC IPC(8): C09K8/52
CPCC09K8/52
Inventor 何小林高金李勇
Owner 成都欧美克石油科技股份有限公司
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