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Dendritic polyether clay shale inhibitor and preparation method and application thereof

A dendritic and inhibitor technology is applied in the field of dendritic polyether shale inhibitor and its preparation, and mud shale inhibitor for drilling fluid, which can solve the problems of drilling fluid foaming, large addition, and viscosity increase. , to achieve the effect of inhibiting hydration and dispersion, highlighting inhibition performance, and not easy to desorb

Active Publication Date: 2017-03-22
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although a lot of research has been carried out on polyether polyols as shale inhibitors for drilling fluids, linear polyethers are generally used, and the dosage is often large, and the inhibitory performance is still not ideal.
In addition, because it is easy to cause drilling fluid foaming and viscosity increase, it will have an adverse effect on drilling fluid rheology and fluid loss.

Method used

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  • Dendritic polyether clay shale inhibitor and preparation method and application thereof
  • Dendritic polyether clay shale inhibitor and preparation method and application thereof
  • Dendritic polyether clay shale inhibitor and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Add 0.1mol (51.6g) initiator GOPAMAM (ethylenediamine as the core) polyamide-amine dendritic polymer and 0.2g potassium hydroxide in a 250mL high-temperature and high-pressure reactor, and purge the pipeline with nitrogen gas after sealing and react kettle 3 times, and then vacuumize the inside of the reactor. Heat the reaction kettle, and when the temperature rises to 80°C, slowly add 1.2mol (52.8g) of ethylene oxide through the metering tank, and add all the ethylene oxide in 10 minutes. After all the ethylene oxide was added, the temperature was raised to 110°C and the temperature was kept stable. When the pressure in the kettle dropped to a constant value, it indicated that the reaction was over. Pass circulating water to cool to room temperature, release the pressure and discharge the material, neutralize the reaction product with acetic acid, desalt by suction filtration, dendritic polyether mud shale inhibitor.

[0053] The synthetic route is as follows:

[005...

Embodiment 2

[0058] Add 0.1mol (28.8g) starter GOPPI (ethylenediamine as the core) polypropyleneimine dendritic polymer and 0.1g potassium hydroxide in a 250mL high-temperature and high-pressure reactor, and purge the pipeline and reaction with nitrogen gas after sealing. kettle 3 times, and then vacuumize the inside of the reactor. Heat the reaction kettle, and when the temperature rises to 70°C, slowly add 0.8mol (46.4g) of propylene oxide through the metering tank. After all the addition is completed within 10 minutes, the temperature is raised to 130°C and the temperature is kept stable. When the pressure in the reactor does not change any more, cool down to about 60°C with circulating water, then add 0.8mol (35.2g) of ethylene oxide through the metering tank, and after adding all of it within 10 minutes, raise the temperature to 110°C and keep the temperature stable . As the reaction proceeds, the pressure in the reactor drops, and when the pressure drops to a constant value, it indi...

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Abstract

The invention discloses a dendritic polyether clay shale inhibitor and a preparation method and an application thereof. The inhibitor is the dendritic polyether clay shale inhibitor obtained by reacting an amino-terminated dendritic polymer and alkyleneoxide. The dendritic polyether clay shale inhibitor has excellent shale inhibition performance, can obviously inhibit hydration expansion and dispersion of the clay shale, has good synergistic inhibition with sylvite, and has advantages of outstanding performance, good environment acceptability, and long aging effect.

Description

technical field [0001] The invention relates to a mud shale inhibitor for drilling fluid, in particular to a dendritic polyether mud shale inhibitor, a preparation method and application thereof, and belongs to the field of petroleum engineering. Background technique [0002] Wellbore stability has always been a worldwide technical problem in oil and gas drilling engineering. According to statistics, about 75% of the drilled formations are mud shale formations, and 90% of wellbore instability problems occur in mud shale formations. Shale hydration is one of the main causes of wellbore instability. For a long time, people have carried out a lot of research on the hydration mechanism of shale, and put forward corresponding technical countermeasures, and successively developed various types of shale inhibitors, such as inorganic salts, cationic polymers, modified asphalt, amphoteric Ionic polymers, methyl glucosides, silicates, positive gels, polymeric alcohols, organic salts...

Claims

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Application Information

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IPC IPC(8): C09K8/035C08G83/00
CPCC09K8/035C08G83/004C09K2208/12
Inventor 钟汉毅邱正松黄维安汤志川张馨王洪路陈雅户炜婧
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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