Hyperbranched polyether amine environment-friendly shale inhibitor, preparation method thereof and water-based drilling fluid

A technology of hyperbranched polyetheramine and shale inhibitor, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem of low branching degree, and achieve simple synthesis method, good environmental protection performance and inhibition performance Good results

Active Publication Date: 2020-09-29
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As for the aforementioned two inventions, the former belongs to linear polymers, and the latter belongs to linear polymers with branched structure. Although it is multi-branched, the degree of branching is not high, so its shale inhibition performance needs to be improved.

Method used

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  • Hyperbranched polyether amine environment-friendly shale inhibitor, preparation method thereof and water-based drilling fluid
  • Hyperbranched polyether amine environment-friendly shale inhibitor, preparation method thereof and water-based drilling fluid
  • Hyperbranched polyether amine environment-friendly shale inhibitor, preparation method thereof and water-based drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Weigh 10.4095g of 2,2′-oxybis(ethylamine), dissolve it in 41.638g of tetrahydrofuran, and transfer it to a 250mL round bottom flask, then weigh 9.7158g of diallylamine, dissolve it in 38.86 Add the tetrahydrofuran solution of diallylamine dropwise to the round bottom flask at a rate of 2 d / s at 25°C under magnetic stirring conditions, raise the temperature to 60°C, and blow nitrogen. Reflux reaction for 24h.

[0025] (2) After the reaction is over, remove tetrahydrofuran by rotary evaporation at a temperature of 45°C to obtain a viscous light yellow liquid, add 50 mL of acetone while stirring at 25°C to wash the viscous light yellow liquid 4 times , centrifuged, separated, and vacuum-dried at 50°C to obtain a white solid substance, which is the hyperbranched polyetheramine environmental protection shale inhibitor A1.

[0026]

[0027] Among them, R1 is -CH 2 CH 2 CH 2 —.

[0028] The molecular weight of the above-mentioned product A1 is detected, and the fin...

Embodiment 2

[0030] (1) Weigh 13.2204g of aminopropyl ether, dissolve it in 52.88g of ethanol, and transfer it to a 250mL round bottom flask, then weigh 9.7158g of diallylamine, dissolve it in 38.86g of ethanol, at 25°C 1. Under the condition of magnetic stirring, the ethanol solution of diallylamine was dropped into the round bottom flask at a rate of 2d / s, the temperature was raised to 80°C, and nitrogen was blown. Reflux reaction for 16h.

[0031] (2) After the reaction is over, remove tetrahydrofuran by rotary evaporation at a temperature of 50°C to obtain a viscous light yellow liquid, add acetone 50mL to wash the viscous light yellow liquid 4 times while stirring at 25°C, and centrifuge , separated, and vacuum-dried at 60° C. to obtain a white solid substance, which is the hyperbranched polyetheramine environmental protection shale inhibitor A2.

[0032]

[0033] Among them, R 1 for—CH 2 CH 2 CH 2 —.

[0034] The molecular weight of above-mentioned product A2 is detected, an...

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PUM

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Abstract

The invention discloses a hyperbranched polyether amine environment-friendly shale inhibitor, a preparation method thereof and a water-based drilling fluid, and belongs to the technical field of oilfield chemistry. The shale inhibitor is prepared by taking diallylamine and a diether amine compound as raw materials through reaction. The shale inhibitor provided by the invention is a hyperbranched polymer, has good shale inhibition, clay stability and temperature resistance, is easy to biodegrade, and has good environmental protection performance; the preparation method provided by the inventionis simple in steps, easily available in synthetic raw materials and suitable for industrial production; the hyperbranched polyether amine shale inhibitor provided by the invention is good in component compatibility with other conventional drilling fluid treatment agents, the prepared water-based drilling fluid is suitable for a strong water-sensitive shale stratum, the expansion rate of shale canbe obviously reduced, the collapse of a well wall is prevented, the well wall is effectively stabilized, and the occurrence of underground complex conditions is reduced.

Description

technical field [0001] The invention relates to the technical field of oilfield chemistry, in particular to a hyperbranched polyetheramine environmental protection shale inhibitor, a preparation method thereof and a water-based drilling fluid. Background technique [0002] Wellbore instability in shale is a common worldwide technical problem related to drilling fluids. With the strengthening of exploration and development of oil and gas resources and the expansion of exploration fields, the instability of shale wellbore becomes more prominent. Due to the high content of highly water-sensitive clay in mud shale formations, hydration expansion is extremely prone to occur, resulting in complex situations such as well wall collapse, diameter shrinkage, and pipe sticking, which will increase the drilling cycle and cost. [0003] Oil-based drilling fluid has good inhibitory properties and is one of the important technologies to solve shale well wall collapse, but its cost is high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C09K8/24C08G73/02
CPCC09K8/035C09K8/24C08G73/024C09K2208/12
Inventor 谢刚肖玉容邓明毅罗玉婧范莉
Owner SOUTHWEST PETROLEUM UNIV
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