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Biquaternary ammonium salt compound and application thereof in solid-phase chemical cleaning agent

A double quaternary ammonium salt, solid-phase chemistry technology, applied in the field of oil drilling, can solve the problems such as can not effectively inhibit the hydration expansion and dispersion of drilling cuttings, destroy the colloidal stability of drilling fluid, reduce the solid phase removal efficiency, etc. High phase removal efficiency, high shale rolling recovery rate, and good inhibition ability

Active Publication Date: 2015-11-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current non-dispersible drilling fluid has insufficient inhibition performance and cannot effectively inhibit the hydration expansion and dispersion of cuttings, which will inevitably increase the difficulty of mechanical removal, resulting in a decrease in the efficiency of solid phase removal
In addition, there is a general contradiction between "drilling fluid performance stability" and "formation well wall stability" in drilling fluids, that is, while improving the drilling fluid inhibition, it affects or even destroys the colloidal stability of the drilling fluid.
Therefore, the suppression ability of the existing drilling fluid system is limited, which is not enough to achieve better solid phase control.

Method used

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  • Biquaternary ammonium salt compound and application thereof in solid-phase chemical cleaning agent
  • Biquaternary ammonium salt compound and application thereof in solid-phase chemical cleaning agent
  • Biquaternary ammonium salt compound and application thereof in solid-phase chemical cleaning agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Add 517 grams of water and 144 grams (2 moles) of acrylamide into the reaction kettle, stir until the acrylamide is completely dissolved, then add 102.2 grams (1 mole) of dimethylaminopropylamine, stir for 5 to 10 minutes, and React at 20°C for 16 hours; after the reaction time is up, heat up to 30°C, add 0.431 grams of catalyst benzyltriethylammonium chloride, and then slowly add 185 grams (2 moles) of epichlorohydrin to the reaction kettle dropwise , keep the temperature of the reaction system within 35°C during the dropwise addition; after adding epichlorohydrin, the temperature is raised to 70°C, and the reaction is continued for 1 hour. After the reaction time is up, the reaction product is dried and pulverized to obtain the structural formula: The diquaternary ammonium salt compound shown in (II).

[0052]

[0053] The appearance of the compound obtained in this example is white or slightly yellow crystal, which is very easy to absorb moisture, and its aqueous ...

Embodiment 2

[0056] Add 668 grams of water and 144 grams (2 moles) of acrylamide into the reaction kettle, stir until the acrylamide is completely dissolved, then add 107.3 grams (1.05 moles) of dimethylaminopropylamine, stir for 5 to 10 minutes, and set the temperature at 0 to 20°C Reacted for 32 hours; after the reaction time reached, the temperature was raised to 30°C, 4.31g of catalyst tetrabutylammonium bromide was added, and then 194.25 grams (2.1 moles) of epichlorohydrin was slowly added dropwise to the reactor, and the dropwise addition process kept The temperature of the reaction system is within 35°C; after the addition of epichlorohydrin, the temperature is raised to 60°C, and the reaction is continued for 3 hours. After the reaction time is up, the reaction product is dried and pulverized to obtain a diquaternary ammonium compound.

Embodiment 3

[0058] Add 517 grams of water and 144 grams (2 moles) of acrylamide into the reaction kettle, stir until the acrylamide is completely dissolved, then add 102.2 grams (1 mole) of dimethylaminopropylamine, stir for 5 to 10 minutes, and store at 0 to 20°C React for 24 hours; after the reaction time reaches 30°C, add 2.2 grams of catalyst tetrabutylammonium chloride, and then slowly add 185 grams (2 moles) of epichlorohydrin to the reactor. Keep the temperature of the reaction system within 35°C; raise the temperature to 65°C after adding the epichlorohydrin, and continue the reaction for 5 hours. After the reaction time is up, dry and pulverize the reaction product to obtain the bis-quaternary ammonium compound.

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Abstract

The invention discloses a biquaternary ammonium salt compound and application thereof in a solid-phase chemical cleaning agent and belongs to the field of petroleum drilling. The biquaternary ammonium salt compound provided by the invention has a structural formula represented by a general formula (I) shown in the description. The biquaternary ammonium salt compound provided by the invention can play a dual role in flocculating and inhibiting in the solid-phase chemical cleaning agent. The invention also provides intermediates for preparing the solid-phase chemical cleaning agent and the solid-phase chemical cleaning agent containing at least one of the aforementioned intermediates. The solid-phase chemical cleaning agent provided by the invention is good in drilling fluid inhibiting capacity and high in harmful solid phase removal efficiency, has little influence on the filtration loss and rheological property of drilling fluid in an effective dose range, can achieve low-solid-phase rapid well drilling and meets the needs of different water-base drilling fluid systems.

Description

technical field [0001] The invention belongs to the field of petroleum drilling, and in particular relates to a diquaternary ammonium salt compound and its application in solid-phase chemical cleaners. Background technique [0002] Drilling fluid solid phase control technology mainly removes useless inert solid phase in drilling fluid through chemical and mechanical methods, and at the same time controls the active solid phase within a certain range. Useless solid phase and part of active solid phase mainly come from cuttings. Excessive solid phase content in drilling fluid will easily lead to lower drilling speed, pollution of oil and gas reservoirs, difficulty in maintaining drilling fluid performance, increased friction coefficient, and complex downhole situations. [0003] At present, the commonly used drilling fluid solid phase control method is to add additives such as polymer polyacrylamide to the drilling fluid, and use the non-dispersible drilling fluid to floccula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D303/36C07D301/27C09K8/035C09K8/52
CPCC07D301/27C07D303/36C09K8/035C09K8/52
Inventor 杨小华王中华林永学王琳
Owner CHINA PETROLEUM & CHEM CORP
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