Oil base mud flushing agent for well cementation and method for preparing flushing solution

A technology of oil-based mud and flushing agent, applied in chemical instruments and methods, drilling composition and other directions, can solve the problem of affecting the cementing quality, affecting the cementing strength of cement sheath, casing and well wall, and being unable to effectively seal Oil and gas formation and other problems, to achieve the effect of improving cementing quality, improving displacement efficiency, and being beneficial to protection

Active Publication Date: 2017-05-24
卫辉市化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Oil-based drilling fluid has the advantages of good thermal stability, wide density range, easy adjustment of rheology, resistance to various salt pollution, strong inhibitory effect on mud shale, etc., and because the filtrate is oil phase, it avoids oil and gas Therefore, oil-based drilling fluids are often used for drilling in well areas with high water-sensitivity of reservoirs to protect oil and gas layers from damage. The formed oil-based drilling fluid deposits and mud cake seriously affect the bonding strength of the cement sheath formed after cementing, the casing and the well wall, and cannot effectively seal off the oil and gas layers, thus seriously affecting the cementing quality

Method used

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  • Oil base mud flushing agent for well cementation and method for preparing flushing solution
  • Oil base mud flushing agent for well cementation and method for preparing flushing solution
  • Oil base mud flushing agent for well cementation and method for preparing flushing solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The oil-based mud flushing agent for well cementing is composed of the following materials in parts by weight: 18.5 kg of ethylene glycol monobutyl ether, 10 kg of diesel oil, 5 kg of tributyl phosphate, 7 kg of alkylphenol polyoxyethylene ether, nonyl acid 7 kilograms of polyoxyethylene ether, 11 kilograms of sodium fatty alcohol polyoxyethylene ether sulfate, 12.5 kilograms of sodium dodecylbenzenesulfonate and 29 kilograms of water.

[0042] The preparation method of the oil-based mud flushing fluid for well cementing: firstly add 29 kg of distilled water into the reaction kettle by weight and start stirring, then add 12.5 kg of sodium dodecylbenzene sulfonate, and then add 10 kg of diesel oil and After stirring 18.5 kg of ethylene glycol monobutyl ether evenly, add 7 kg of alkylphenol polyoxyethylene ether and 7 kg of nonyl acid polyoxyethylene ether and stir for 30 to 40 minutes, then add fatty alcohol polyoxyethylene sodium sulfate 11 Stir for 55-65 minutes with o...

Embodiment 2

[0044] The oil-based mud flushing agent for well cementing is composed of the following materials in parts by weight: 0.05 kg of fluorocarbon surfactant, 18.5 kg of ethylene glycol monobutyl ether, 10 kg of diesel oil, 5 kg of tributyl phosphate, alkylphenol polyoxygen 7 kg of vinyl ether, 7 kg of polyoxyethylene nonyl acid, 11 kg of sodium fatty alcohol polyoxyethylene ether sulfate, 14.5 kg of sodium dodecylbenzene sulfonate and 27 kg of water.

[0045] The preparation method of oil-based mud flushing fluid for well cementing: First, add 27 kg of distilled water to the reaction kettle by weight and start stirring, then add 14.5 kg of sodium dodecylbenzene sulfonate, and then add fluorocarbon surfactant after fully dissolving Add 0.05 kg of solvent, 10 kg of diesel oil and 18.5 kg of ethylene glycol monobutyl ether and stir evenly, then add 7 kg of alkylphenol polyoxyethylene ether and 7 kg of nonyl acid polyoxyethylene ether and stir for 30-40 minutes, then add Stir 11 kg of...

Embodiment 3

[0047] The oil-based mud flushing agent for well cementing is composed of the following materials in parts by weight: 0.1 kg of fluorocarbon surfactant, 20 kg of ethylene glycol monobutyl ether, 10 kg of diesel oil, 5 kg of tributyl phosphate, alkylphenol polyoxygen Vinyl ether 7 kg, nonyl acid polyoxyethylene ether 7 kg, fatty alcohol polyoxyethylene ether sodium sulfate 11 kg, sodium dodecylbenzene sulfonate 14.5 kg and water 25.5 kg.

[0048]The preparation method of oil-based mud flushing fluid for well cementing: first add 25.5 kg of distilled water to the reaction kettle by weight and start stirring, then add 14.5 kg of sodium dodecylbenzene sulfonate, and then add fluorocarbon surface active after fully dissolving After stirring 0.1 kg of agent, 10 kg of diesel oil and 20 kg of ethylene glycol monobutyl ether, add 7 kg of alkylphenol polyoxyethylene ether and 7 kg of nonyl acid polyoxyethylene ether and stir for 30-40 minutes, then add Stir 11 kg of fatty alcohol polyox...

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Abstract

The invention discloses an oil base mud flushing agent for well cementation and a method for preparing a flushing solution. The oil base mud flushing agent is composed of fluorocarbon surfactant, ethylene glycol monobutyl ether, diesel oil, tributyl phosphate, alkylphenol ethoxylates, nonyl acid polyoxyethylene ether, ethoxylated lauryl alcohol sulfates and sodium dodecylbenzene sulfonate. After the oil base mud flushing agent for well cementation is prepared into the flushing solution, the flushing solution has good capability of flushing oil base mud and a filter cake.

Description

technical field [0001] The invention relates to oil-based mud flushing, in particular to a preparation method of an oil-based mud flushing agent and a flushing liquid for well cementing. Background technique [0002] Oil-based drilling fluid has the advantages of good thermal stability, wide density range, easy adjustment of rheology, resistance to various salt pollution, strong inhibitory effect on mud shale, etc., and because the filtrate is oil phase, it avoids oil and gas Therefore, oil-based drilling fluids are often used for drilling in well areas with high water-sensitivity of reservoirs to protect oil and gas layers from damage. The formed oil-based drilling fluid deposits and mud cake seriously affect the bonding strength of the cement sheath formed after cementing, the casing and the well wall, and cannot effectively isolate the oil and gas layers, thereby seriously affecting the cementing quality. In order to remove the oil-based mud and oil-based mud cake, impro...

Claims

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Application Information

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IPC IPC(8): C09K8/524C09K8/528C09K8/52
CPCC09K8/52C09K8/524C09K8/528
Inventor 李新芬卢甲晗梁艳丽靳建忠郭娟赵元伟赵俊涛穆莺耿强王爱民
Owner 卫辉市化工有限公司
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