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Drilling fluid and nanometer blocking agent for drilling fluid of oil field

A nano-blocking agent and oilfield drilling technology, which is applied in the field of oilfield drilling fluid, can solve the problems of effective plugging of nano-scale micro-fractures, ineffective plugging and anti-slumping, poor plugging effect, etc., achieving remarkable plugging effect, Improve mud cake ability and stabilize well wall

Inactive Publication Date: 2019-05-10
北京培康佳业技术发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the conventional plugging agents are modified asphalt, including sulfonated asphalt and emulsified asphalt. The particle size of these asphalt plugging agents is mostly in the micron level or above. Plugging, when the initial nano-scale micro-cracks cannot be plugged in time, the micro-cracks will grow and grow and cause the formation strength to deteriorate. collapse

Method used

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  • Drilling fluid and nanometer blocking agent for drilling fluid of oil field

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Effect test

Embodiment 1

[0020] According to the weight ratio, 38 parts of industrial superior grade acetylacetone were added to the reactor, and 22 parts of industrial superior grade methyl isobutyl ketone and 42 parts of industrial superior grade 4-hydroxy-4-methyl-2- Pentanone, 1.6 parts of industrial superior grade cyclohexanone, stirred at room temperature for 20 minutes until uniform, then added 1.5 parts of industrial superior grade diethanolamine to catalyze and participate in the reaction, heated slowly, raised the temperature to 105°C, and kept 105°C at The reaction was continued for 6 hours under stirring, and cooled to obtain the nano plugging agent for oilfield drilling fluid of this embodiment.

Embodiment 2

[0022] According to the weight ratio, 42 parts of industrial superior grade acetylacetone were added to the reactor, and 28 parts of industrial superior grade methyl isobutyl ketone and 46 parts of industrial superior grade 4-hydroxy-4-methyl-2- Pentanone, 1.9 parts of industrial superior grade cyclohexanone, stirred at room temperature for 20 minutes until uniform, then added 1.6 parts of industrial superior grade diethanolamine to catalyze and participate in the reaction, heated slowly, raised the temperature to 105°C, and kept 105°C at The reaction was continued for 6 hours under stirring, and cooled to obtain the nano plugging agent for oilfield drilling fluid of this embodiment.

Embodiment 3

[0024] According to the weight ratio, 45 parts of industrial superior grade acetylacetone were added to the reactor, and 26 parts of industrial superior grade methyl isobutyl ketone and 48 parts of industrial superior grade 4-hydroxy-4-methyl-2- Pentanone, 1.9 parts of industrial superior grade cyclohexanone, stirred at room temperature for 20 minutes until uniform, then added 1.7 parts of industrial superior grade diethanolamine to catalyze and participate in the reaction, heated slowly, raised the temperature to 105°C, and kept 105°C at The reaction was continued for 6 hours under stirring, and cooled to obtain the nano plugging agent for oilfield drilling fluid of this embodiment.

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Abstract

The invention discloses a drilling fluid and a nanometer blocking agent for the drilling fluid of oil field. The drilling fluid is modified ketal generated from reaction of diacetone, methyl isobutylketone, 4-hydroxy-4-methyl-2-pentanone, cyclohexanone and diethanol amine. The preparation method for the drilling fluid disclosed by the invention is simple; nitrogen protection is not required by the reaction process; the product acquired from reaction of various raw materials can be directly cooled and need not be heated for drying. The blocking agent disclosed by the invention has high fluidity; the effect of blocking microfractures, especially nanometer microfractures, on floor is obvious; after the blocking agent is added into the drilling fluid of oil field, mud cake can be effectivelyimproved, well wall can be stabilized and collapse can be prevented.

Description

technical field [0001] The invention relates to the technical field of oilfield drilling fluid materials, in particular to a nano-blocking agent modified ketal NAX50 for oilfield drilling fluid and the prepared oilfield drilling fluid. Background technique [0002] In the face of increasingly complex geological conditions in the process of oil and gas exploration and development, higher requirements are put forward for the stability of the well wall. The transfer effect in the micro-fractures causes the development of fractures, which makes the stability of the wellbore wall worse, and in severe cases, it leads to drilling accidents such as wellbore collapse. Therefore, it is necessary to add a plugging agent to the drilling fluid to improve the quality of the mud cake, plug the formation micro-fractures, and stabilize the borehole wall. Formation micro-cracks often start from nano-scale micro-cracks and develop under the action of physical and chemical factors such as hydr...

Claims

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Application Information

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IPC IPC(8): C09K8/035C09K8/12B82Y40/00B82Y30/00
Inventor 姚少全
Owner 北京培康佳业技术发展有限公司
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