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Shale inhibitor for drilling fluid and preparation method thereof

A technology for shale inhibitor and drilling fluid, applied in the field of petroleum drilling fluid, can solve the problems of complicated steps, many raw materials and high cost, and achieves the effects of good repeatability, difficult desorption and strong effect

Active Publication Date: 2018-06-26
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyamine shale inhibitor obtained by the reaction of polyetheramine, oxalic acid, polydimethyldiallylammonium chloride and choline chloride can effectively inhibit the hydration expansion of mud shale, and has low toxicity and low Ammonia odor, high thermal stability and good compatibility with other treatment agents; but more raw materials are used, the steps are cumbersome and the cost is higher

Method used

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  • Shale inhibitor for drilling fluid and preparation method thereof
  • Shale inhibitor for drilling fluid and preparation method thereof
  • Shale inhibitor for drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Add 240g (0.4mol) polyetheramine M600 (Huntsman company) and 12g (0.2mol) acetic acid in the 500mL four-neck round-bottomed flask equipped with thermal device, temperature controller, water separator and stirrer, under nitrogen protection, heat Raise the temperature to 150° C., stir and react for 2 hours at a stirring speed of 150 r / min, and obtain the shale inhibitor for drilling fluid. The water vapor generated during the reaction was carried away by nitrogen flow. The product obtained from the reaction can be directly added to the drilling fluid as an inhibitor.

[0048] The synthesis route of shale inhibitor for drilling fluid is as follows:

[0049]

[0050] figure 1 Infrared spectrogram of the shale inhibitor for drilling fluid prepared for this example. Depend on figure 1 It can be seen that due to the formation of hydrogen bonds, there are two peaks in the N-H stretching vibration, which are 3270 cm -1 and 3050cm -1 , 2970cm -1 、2870cm -1 NH 3 The sy...

Embodiment 2

[0052] Add 176g (1mol) of polyoxyethylene diamine EDR176 (Huntsman Company) and 63g (0.5mol) of oxalic acid to a 500mL four-neck round-bottom flask equipped with a thermal device, temperature controller, water separator and stirrer, nitrogen protection , heated to 150°C, stirred and reacted for 5 hours, and the stirring rate was 150r / min, and the shale inhibitor for drilling fluid was obtained. The water vapor generated during the reaction was carried away by nitrogen flow. The product obtained from the reaction can be directly added to the drilling fluid as an inhibitor.

[0053] The synthesis route of shale inhibitor for drilling fluid is as follows:

[0054]

[0055] figure 2 Infrared spectrogram of the shale inhibitor for drilling fluid prepared for this example. Depend on figure 2 It can be seen that 3290cm -1 N-H stretching vibration absorption peak, 1650cm -1 It is C=O stretching vibration absorption peak (amide I peak), 1560cm -1 C-N-H bending vibration abs...

Embodiment 3

[0057] Add 215g (0.5mol) of polyoxypropylene diamine D-400 (Huntsman Company) and 29.5g (0.25mol) of butanediene into a 500mL four-necked round-bottomed flask equipped with a heating device, a temperature controller, a water separator and a stirrer. acid, under the protection of nitrogen, heated to 140°C, stirred for 8 hours, and the stirring rate was 300r / min, and the shale inhibitor for drilling fluid was obtained. The water vapor generated during the reaction was carried away by nitrogen flow. The product obtained from the reaction can be directly added to the drilling fluid as an inhibitor.

[0058] The synthesis route of shale inhibitor for drilling fluid is as follows:

[0059]

[0060] image 3 Infrared spectrogram of the shale inhibitor for drilling fluid prepared for this example. Depend on image 3 It can be seen that 3280cm -1 N-H stretching vibration absorption peak, 1700cm -1 It is C=O stretching vibration absorption peak (amide I peak), 1560cm -1 It is ...

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Abstract

The invention relates to a shale inhibitor used for drilling fluid and a preparing method thereof. The shale inhibitor is a low molecular polymer containing ether linkage, amido and acylamino. The prepared shale inhibitor used for drilling fluid can effectively inhibit hydration of clay, clay shale and debris, has strong surface action with the clay, is not easy to desorb, and can exert a long-acting inhibiting effect. The preparing method of the shale inhibitor used for the drilling fluid is easy, strong in controllability, good in repeatability, and convenient for industrial production.

Description

technical field [0001] The invention relates to a shale inhibitor for drilling fluid and a preparation method thereof, belonging to the technical field of petroleum drilling fluid. Background technique [0002] During oil and gas drilling, when drilling into shale formations, the hydration expansion and dispersion of shale will lead to a series of problems such as wellbore instability, bit balling and borehole purification difficulties. In order to achieve safe, high-quality, fast and environmentally friendly modern drilling technology requirements, researchers at home and abroad have been seeking to develop treatment agents and drilling fluid systems with excellent inhibition performance. In the past few decades, a variety of anti-slump inhibitors have been developed, such as inorganic salts, formates, asphalts, positive gels, glucose derivatives, polymeric alcohols, silicates and quaternary ammonium cations, etc. . Based on these inhibitors, various drilling fluid system...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C09K8/22C07C231/02C07C233/18C07C235/08
CPCC07C231/02C07C233/18C07C235/08C09K8/035C09K8/22C09K2208/12
Inventor 钟汉毅邱正松黄维安赵欣王伟吉张道明汤志川张馨
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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