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Anti-collapse agent for oilfield drilling fluids, and preparation method and application thereof

An anti-slump agent and drilling fluid technology, applied in the field of non-fluorescent white asphalt and its preparation, can solve the problems of poor plugging and anti-slump performance, weak anti-salt and anti-calcium ability, and limited application, and achieve the ability to resist salt and calcium. Strong, wide range of softening point, the effect of preventing the collapse of the well wall

Active Publication Date: 2015-06-10
北京培康佳业技术发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, sulfonated asphalt products also have obvious disadvantages: (1) high fluorescence level, which interferes with geological logging and limits its application in exploration wells; (2) contains more toxic substances of condensed ring aromatics, which seriously pollutes the environment , in today's increasingly demanding environmental protection, sulfonated asphalt products can no longer meet the requirements of environmental protection
But the softening point of the product obtained by this prior art is low, generally less than 60°C, which is not suitable for drilling exploration wells and development wells with high bottom temperature, and the product obtained by this prior art has low salt and calcium resistance. , the plugging and anti-collapse performance is poor when drilling into the salt-gypsum layer

Method used

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  • Anti-collapse agent for oilfield drilling fluids, and preparation method and application thereof
  • Anti-collapse agent for oilfield drilling fluids, and preparation method and application thereof
  • Anti-collapse agent for oilfield drilling fluids, and preparation method and application thereof

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Embodiment 1

[0026] Take 25 parts of lauric acid, 20 parts of lauryl alcohol and 6 parts of glycerol by weight into the reaction kettle, heat up to 80°C, and react for 5 hours under stirring to obtain the anti-slump agent for drilling fluid of this embodiment Non-fluorescent white asphalt. The stirring speed has no effect, generally 50-120 rpm, and the reaction pressure of the system is normal pressure, which is the same as in the following examples and will not be repeated.

Embodiment 2

[0028] Take 26 parts of palmitic acid, 25 parts of stearyl alcohol, and 8 parts of ethylene glycol by weight and add them to the reaction kettle, heat up to 90°C, and react for 6 hours under stirring to obtain the anti-corrosion oil for drilling fluid of this embodiment. Slumping agent non-fluorescent white asphalt.

Embodiment 3

[0030] Take 4 parts of lauric acid, 6 parts of palmitic acid, 17 parts of stearic acid, 22 parts of palmityl alcohol and 10 parts of ethylene glycol into the reaction kettle by weight, heat up to 85 ° C, and react for 6 hours under stirring. That is, the non-fluorescent white asphalt of the anti-slump agent for drilling fluid of this embodiment was obtained.

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Abstract

The invention provides an anti-collapse agent for oilfield drilling fluids, and a preparation method and application thereof. The method comprises the following steps: mixing high-carbon aliphatic acid, high-carbon fatty alcohol and polyalcohol in a weight ratio of (20-30):(18-27):(5-12), and stirring at 70-105 DEG C for react for 5-7 hours, wherein the product is the anti-collapse agent for drilling fluids. The anti-collapse agent is fluorescence-free white asphalt, can be used for test shafts and development wells, and can effectively improve the drilling fluid sludge cake and prevent the side wall from collapse. Compared with the prior art, the anti-collapse agent has the advantages of low fluorescence level, high salt and calcium resistance, no biological toxicity, no environment pollution and the like; and the product has wide softening point range, and is applicable to test shafts and development wells with different bottom temperatures.

Description

technical field [0001] The invention relates to an anti-slump agent for oilfield drilling fluid and its preparation method and application, in particular to a non-fluorescence white asphalt which can be used as an anti-slump agent for oilfield drilling fluid, its preparation method and related applications. Background technique [0002] With the development of exploration and development technology in the petroleum industry, the requirements for drilling fluid anti-slump agents are getting higher and higher. Asphalt and its modified products, such as sulfonated asphalt products, are widely used because of their good anti-slump performance in drilling fluids and protection of oil and gas layers, and are recognized as the best drilling fluid anti-slump agents at home and abroad. However, sulfonated asphalt products also have obvious disadvantages: (1) high fluorescence level, which interferes with geological logging and limits its application in exploration wells; (2) contains...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C09K8/56
CPCC09K8/035C09K8/575
Inventor 姚少全
Owner 北京培康佳业技术发展有限公司
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