Oxidized Asphalt As Fluid Loss Reducer For Oil-based Drilling Fluids
Oxidized asphalt is one of the important methods for producing road asphalt, construction asphalt and hydraulic asphalt. Oxidative modification of oxidized asphalt to produce road asphalt is to mixture with low softening point, high penetration and high temperature sensitivity, and let air in at a certain temperature to make its composition Changes occur, softening point increases, penetration and temperature sensitivity to meet asphalt specifications and performance requirements. After modification by oxidation, oxidized asphalt has good temperature properties, that is, high-temperature stability and low-temperature cracking resistance are improved." The study of the oxidation mechanism of asphalt helps to understand how oxidation improves the properties of asphalt.
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Application scope: |
oil-based drilling fluid, synthetic-based drilling fluid
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Function: |
sealing fractures and reducing filtration loss
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Mechanism: |
Part of it dissolves to form a blocking colloid, and the insoluble part deforms and participates in forming a thin and dense mud cake to seal the formation gaps.
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Applicable well temperature: |
100-180℃
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Recommended dosage: |
2-4% (mass fraction)
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