Anti-collapse blocking agent cation modified asphalt for drilling fluid

Abstract

Anti-collapse blocking agent cationic modified asphalt for a drilling fluid is prepared from the following raw materials: petroleum asphalt powder, a modifier, a surfactant, a stabilizer and high-boiling-point solvent oil. The modifier is triazinyl single-activity monoquaternary ammonium salt, s-triazinyl single-activity biquaternary ammonium salt and a polyamine compound; and the surfactant is hexadecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium bromide, Tween 80, Tween 60 and OP-10. The preparation method comprises the following steps: adding the high-boiling-point solvent oiland the petroleum asphalt powder into a reaction kettle, and conducting heating, stirring and dissolving to obtain an asphalt glue solution; adding a surfactant and a modifier into the asphalt glue solution, and conducting reacting to obtain a colloid; adding a stabilizer to obtain a gelatinous product; and conducting cooling to a solidified state, and conducting crushing to obtain a final product. The plugging performance is good, wall collapse can be inhibited, complex drilling accidents are effectively avoided or reduced, and the drilling quality and the drilling efficiency are improved.

Description

technical field [0001] The invention relates to a petroleum drilling aid, in particular to a cation-modified asphalt of an anti-slump plugging agent for drilling fluids, and also relates to a preparation method of the cation-modified asphalt of the anti-slump plugging agent used for drilling fluids. Background technique [0002] Drilling fluid is an important fluid in drilling engineering. Its performance is directly related to the quality of drilling, and it also plays a crucial role in the oil recovery efficiency of an oilfield. At present, there are many kinds of anti-collapse plugging agents on the market, but they are often not efficient and environmentally friendly. At present, the commonly used anti-slump plugging agents that can meet the requirements of environmental protection have certain shortcomings in their performance. [0003] The inventor retrieved the following relevant patent documents: CN103265816A discloses a low softening point emulsified asphalt for dr...

AI Technical Summary

Problems solved by technology

[0004] Some of the above technologies use raw materials with strong alkalinity, which are not easy to degrade, and are easy to cause environmental pollution to the land

And the production process is complicated and the cost is high

The above technologies have not given specific guidance on how to use anti-slump plugging agents for drilling fluids to fully inhibit well wall collapse, avoid complex drilling accidents, improve drilling quality and efficiency, and have environmental protection functions.

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