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Alkyl tetramine synthesis method, alkyl tetramine product and shale inhibitor thereof

A technology of alkyltetramine and synthesis method, which is applied in the field of oil and gas field drilling, and achieves the effects of stable and reliable technology, high yield and improved inhibition performance

Active Publication Date: 2017-01-25
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the problems referred to above, the object of the present invention is to provide a synthetic method of alkyltetramine shale inhibitor, and the drilling fluid additive prepared by the prepared product can fully meet the drilling requirements of various complicated well conditions, effectively Reduce the problem of well wall instability due to shale hydration and dispersion; the synthesis method provided by the invention is reliable, the synthesis yield is high, the raw material price is cheap, the production cost is low, the product is safe and environmentally friendly, and it is suitable for large-scale industrial production

Method used

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  • Alkyl tetramine synthesis method, alkyl tetramine product and shale inhibitor thereof
  • Alkyl tetramine synthesis method, alkyl tetramine product and shale inhibitor thereof
  • Alkyl tetramine synthesis method, alkyl tetramine product and shale inhibitor thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Adopt the following ratio and steps to synthesize alkyltetramines, the steps are as follows:

[0043] S1, the synthesis of amino acids

[0044] S1.1. Dissolve 0.2 mol of sodium metal in absolute ethanol, add the sodium ethoxide solution dropwise into 0.2 mol of acetamidodiethylmalonate ethanol solution, and stir at a constant speed for 1 h;

[0045] S1.2. Add 0.1 mol of 1,2-dibromoethane dropwise to the solution prepared in step S1.1, and reflux for 5.5 hours. After the reaction is completed, filter and rotary evaporate;

[0046] S1.3. Add 100 ml of 46% hydrogen bromide solution to the solution prepared in step S1.2, and reflux for 7 hours;

[0047] S1.4. Remove the hydrogen bromide solution in the solution obtained in S1.3 by rotary evaporation, dissolve the crude product in ethanol, then add 55% ethanol pyridine solution according to the volume ratio, let stand for 12 hours, and filter with suction;

[0048] S2, esterification reaction

[0049] S2.1. Take 5 mmol of...

Embodiment 2

[0063] Adopt the following ratio and steps to synthesize alkyltetramines, the steps are as follows:

[0064] S1, the synthesis of amino acids

[0065] S1.1. Dissolve 0.21 mol of sodium metal in absolute ethanol, add the sodium ethoxide solution dropwise to 0.2 mol of acetamidodiethyl malonate in ethanol, and stir at a constant speed for 1.5 h;

[0066] S1.2. Add 0.11 mol of 1,3-dibromopropane dropwise to the solution prepared in step S1.1, and reflux for 7 hours. After the reaction is completed, filter and rotary evaporate;

[0067] S1.3. Add 100 ml of 49% hydrogen bromide solution to the solution prepared in step S1.2, and reflux for 8 hours;

[0068] S1.4. Remove the hydrogen bromide solution in the solution prepared in S1.3 by rotary evaporation, dissolve the crude product in ethanol, then add 65% ethanol pyridine solution according to the volume ratio, let stand for 12 hours, and filter with suction;

[0069] S2, esterification reaction

[0070] S2.1. Take 5 mmol of the...

Embodiment 3

[0084] Adopt the following ratio and steps to synthesize alkyltetramines, the steps are as follows:

[0085] S1, the synthesis of amino acids

[0086] S1.1. Dissolve 0.202 mol of sodium metal in absolute ethanol, add the sodium ethoxide solution dropwise to 0.2 mol of acetamidodiethyl malonate in ethanol, and stir at a constant speed for 1 hour;

[0087] S1.2. Add 0.105 mol of 1,4-dibromobutane dropwise to the solution prepared in step S1.1, and reflux for 6 hours. After the reaction is completed, filter and rotary evaporate;

[0088] S1.3. Add 100 ml of 48% hydrogen bromide solution to the solution prepared in step S1.2, and reflux for 7 hours;

[0089] S1.4. Remove the hydrogen bromide solution in the solution obtained in S1.3 by rotary evaporation, dissolve the crude product in ethanol, then add 60% ethanol pyridine solution according to the volume ratio, let stand for 12h, and filter with suction ;

[0090] S2, esterification reaction

[0091] S2.1. Take 5 mmol of the ...

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Abstract

The invention relates to an alkyl tetramine synthesis method, an alkyl tetramine product and a shale inhibitor thereof. The synthesis method comprises the following steps of S1, amino acid synthesis; S2, esterification reaction; S3, ammonia transesterification; S4, Hofmann degradation reaction; S5, BOC removal protection. The alkyl tetramine product prepared by the method has the molecular structural formula shown as the accompanying drawing; the alkyl tetramine product and clear water are prepared into the shale inhibitor according to the proportion of 1 to 3 percent. The synthesis method provided by the invention is reliable; the synthesis yield is high; the raw material price is low; the production cost is low; the product is safe, achieves the environment-friendly effects, and is suitable for large-scale industrial production. The alkyl tetramine product is nontoxic and harmless and has good water solubility; the inhibition performance is obviously improved through being compared with that of similar products; meanwhile, the temperature-resistant capability reaches 240 DEG C; the product is particularly suitable for ultra-high-temperature deep well drilling.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field drilling, and in particular relates to a method for synthesizing an alkyltetramine shale inhibitor suitable for complex shale drilling and its product, and a shale inhibitor configured by using alkyltetramine . Background technique [0002] At present, in domestic and foreign drilling, there are often problems of well wall instability. Wellbore instability may lead to problems such as wellbore collapse, diameter shrinkage, and pipe sticking, increasing drilling time and drilling costs. 75% of wellbore instability mainly occurs in shale formations, especially water-sensitive formations. [0003] The exploration and development of shale gas resources in my country has been in full swing. According to the accumulation characteristics of shale gas, horizontal wells have become the main drilling method for shale gas development. Compared with conventional horizontal wells, the horizontal s...

Claims

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Application Information

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IPC IPC(8): C09K8/035C07C209/00C07C211/13
CPCC07C209/00C07C227/02C07C227/06C07C227/12C07C231/02C09K8/035C07C211/13C07C237/06C07C229/26
Inventor 谢刚罗平亚邓明毅苏俊琳龚睿谢俊妮王正邓顺杰段强
Owner SOUTHWEST PETROLEUM UNIV
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