A kind of asphalt composition particle and preparation method thereof

A technology for asphalt composition and granules, which is applied in the field of high softening point asphalt composition granules and their preparation, can solve the problems of reduced effective components of asphalt powder, limited particle deformability, and damage to mud system, and achieves reduction of high temperature and high pressure filtration loss. , the effect of increasing deformability and improving compactness

Active Publication Date: 2017-04-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method will reduce the effective components in the asphalt powder, and due to the introduction of other components, it may cause damage to the mud system during use.
[0007] In addition, when the existing high softening point asphalt particles are used in the drilling fluid system, due to the narrow or unlimited particle size distribution, and the deformation ability of each particle size is limited, when there is a wide pore size distribution in oil and gas reservoirs, It cannot be well matched with it, and it is difficult to achieve a good plugging and filtration loss reduction effect

Method used

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  • A kind of asphalt composition particle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take 200g of high softening point asphalt with a softening point of 153°C, add 3.5% cetyltrimethyl ammonium chloride, freeze at -5°C for 3 hours, pulverize it in a small universal pulverizer for 15s, and use 60 Mesh and 80-mesh standard sieves are used for sieving to obtain 60-80-mesh asphalt particles with high softening point. Take 85g of styrene-butadiene latex (solid content of 40%) and put it in a watering can, spray the latex evenly on the asphalt particles obtained in the above test, and turn it while spraying. After spraying, stand at room temperature for 30 minutes, and perform vacuum freeze drying (pre-freezing temperature is -40°C, pre-freezing time is 2 hours, drying temperature is -20°C, drying time is 10 hours) to obtain asphalt composition particles.

Embodiment 2

[0033] Take 200g of high softening point asphalt with a softening point of 172.8 °C, freeze it at -10 °C for 4.5 hours, and pulverize it in a small universal pulverizer for 20s. The obtained asphalt powder is sieved with 80-mesh and 100-mesh standard sieves to obtain 80-100-mesh high softening point asphalt. Take 96 g of neoprene latex (solid content of 30%) and put it in a watering can, spray the latex evenly on the asphalt particles obtained in the above test, and turn while spraying. After spraying, let stand at room temperature for 45 minutes. Add 5.0% sodium lignosulfonate, mix evenly, and perform vacuum freeze drying (pre-freezing temperature -30°C, pre-freezing time 2.5 hours; drying temperature -18°C, drying time 12 hours) to obtain asphalt composition particles.

Embodiment 3

[0035]Take 200g of high softening point asphalt with a softening point of 146.6°C, add 6.0% sodium secondary alcohol base sulfate, freeze at -25°C for 5.5 hours, pulverize it in a small universal pulverizer for 30s, and use the 100-mesh, 120-mesh standard asphalt powder. The sieve is sieved to obtain 100-120 mesh high softening point asphalt. Take 128 g of nitrile latex (solid content of 30%) and put it in a watering can, spray the latex evenly on the asphalt particles obtained in the above test, and turn while spraying. After spraying, let it stand at room temperature for 60 minutes. Vacuum freeze-drying is performed (pre-freezing temperature -35°C, pre-freezing time 3 hours; drying temperature -25°C, drying time 15 hours) to obtain asphalt composition particles.

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Abstract

The invention discloses an asphalt composition particle and a preparation method thereof. The asphalt composition particle comprises the following components in percentage by weight: 80-95% of high-softening-point asphalt particles and 5-20% of latex. The preparation method of the asphalt composition particle comprises the following steps: the latex is uniformly sprayed onto the high-softening-point asphalt particles, the high-softening-point asphalt particles stand still for a period of time so that the latex can permeate, and then are subjected to vacuum freezing drying, and the asphalt composition particles are obtained. The asphalt composition particles have high softening point, good high-temperature performance, simple preparation method, convenience for operation and good blocking and de-filtration effects during deep drilling.

Description

technical field [0001] The present invention relates to an asphalt composition particle, in particular to a high softening point asphalt composition particle used in oil field drilling and its preparation method and application. Background technique [0002] With the development of the petroleum industry and the continuous expansion of the drilling field, the application of bituminous plugging agents in oilfield drilling has received more and more attention. Asphalt plugging agents generally contain water-insoluble asphalt particles and have a certain softening point. When there is a high enough temperature and pressure in the wellbore, the asphalt particles soften and deform, and are squeezed into the micro-fractures in the wellbore, preventing drilling fluid and filtrate from penetrating from the micro-fractures, and effectively plugging the formation together with the mud cake. Bituminous substances are extremely effective anti-slump agents and reservoir protective agent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L9/08C08L11/02C08L9/04C08L9/10C08L25/06C08L97/00C08K5/19C08K5/41C08J3/12C08J3/00C09K8/035
Inventor 傅丽郭皎河姚汉荣刘树华张建峰
Owner CHINA PETROLEUM & CHEM CORP
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