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Cation modified asphalt and preparation method thereof

A technology of modifying asphalt and cations, applied in chemical instruments and methods, building components, building insulation materials, etc., can solve problems such as infiltration, and achieve the effects of preventing infiltration, strong adsorption capacity, and dense sealing

Active Publication Date: 2013-01-09
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]However, the above-mentioned inhibitory water-based drilling fluids more or less exist to seep into the formation and lose water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 30 parts of diesel oil and 30 parts of natural asphalt into the reactor, raise the temperature to 120°C, and stir to dissolve it; after the asphalt is completely dissolved, add 5 parts of cetyltrimethylammonium bromide, and control the temperature at 90~100°C. Stir for 20 minutes; then add 35 parts of epoxy resin, control the temperature at 60~95°C, stir for 90 minutes, and get the cationic modified asphalt product after cooling.

Embodiment 2

[0019] Add 35 parts of diesel oil and 35 parts of natural asphalt into the reactor, raise the temperature to 130°C, and stir to dissolve it; after the asphalt is completely dissolved, add 5 parts of cetyltrimethylammonium bromide and 2 parts of tween-80 to control Stir for 20 minutes at a temperature of 80-90°C; then add 23 parts of epoxy resin, control the temperature at 60-95°C, stir for 100 minutes, and obtain a cationic modified asphalt product after cooling.

Embodiment 3

[0021] Add 35 parts of diesel oil and 35 parts of natural asphalt into the reactor, raise the temperature to 100°C, and stir to dissolve it; after the asphalt is completely dissolved, add 8 parts of cetyltrimethylammonium bromide, and control the temperature at 60-80°C. Stir for 20 minutes; then add 22 parts of polyvinyl acetate latex, control the temperature at 60~70°C, stir for 100 minutes, and get the cationic modified asphalt product after cooling.

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PUM

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Abstract

The invention relates to the technical field of the cation modified asphalt for drilling fluid and the preparation method of the cation modified asphalt, in particular to a kind of cation modified asphalt and a preparation method thereof. The cation modified asphalt comprises the following components in parts by weight: 20-40 parts of asphalt, 3-10 parts of surfactant, 5-50 parts of modifier and the balance mineral oil. Compared with the prior art, the cation modified asphalt has the beneficial effects that the plugging of mud shale stratum with tiny cracks is better, the absorption capability of the cation modified asphalt on the surface of mud shale is stronger, an impervious interlayer can be formed on the well wall, and the drilling fluid filtrate is prevented from being permeated into the stratum, thereby reducing filtration loss amount and preventing the well wall from collapse.

Description

technical field [0001] The invention relates to the technical field of cation-modified asphalt for drilling fluid and a preparation method thereof, and relates to a cation-modified asphalt and a preparation method thereof. Background technique [0002] Drilling fluid is a working fluid that can carry cuttings, cool and lubricate drill bits, balance formation pressure, protect wellbore stability and protect oil layers from damage during drilling. Its performance directly affects drilling efficiency and downhole safety. And cost control is an important part of drilling engineering technology. [0003] In drilling engineering, we often encounter strong water-sensitive mud shale formations, which are likely to cause complex accidents such as bit bagging, well wall collapse, well diameter reduction, torque increase, and drilling tool jamming, which will bring great harm to drilling engineering. . In order to solve the above problems, in the past few years, various methods ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L63/00C08L75/04C08L33/04C08L7/02C08L23/22C08L31/04C09K8/035
Inventor 陈若铭黄治中李称心乔东宇郑义平马世昌王凤军贾永红
Owner BC P INC CHINA NAT PETROLEUM CORP
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