Well wall stabilizer propylene Fischer-Tropsch wax polymer for drilling fluid and preparation method thereof

Abstract

The invention provides a borehole wall stabilizer propylene Fischer-Tropsch wax polymer for drilling fluid and a preparation method thereof, and the preparation method comprises the following steps: S1, adding accurately weighed Fischer-Tropsch wax, stearic acid, an emulsifier and water into a reaction kettle, heating to 100 DEG C, and carrying out constant-temperature emulsification reaction for 1 hour; s2, adding an acrylonitrile polymer into the reaction kettle, controlling the temperature at 130-140 DEG C, and stirring to react for 2 hours; s3, sequentially adding high alcohol and polyethylene glycol, and carrying out polymerization reaction for 1 hour; s4, adding light calcium carbonate into the reaction kettle to react for 2 hours; and carrying out spray granulation to obtain the liquid borehole stabilizer modified propylene Fischer-Tropsch wax polymer. The borehole wall stabilizer modified propylene Fischer-Tropsch wax polymer for the drilling fluid prepared by the method is relatively high in oil solubility and water solubility, is high in solubility in the drilling fluid at the high temperature of 200 DEG C, is excellent in high-temperature and high-pressure plugging filter loss effect, can effectively reduce the plastic viscosity and the dynamic shearing force of soil slurry, improves the rheological property and the filter loss of the high-solid-phase drilling fluid, and can be used for preparing the drilling fluid. The fluorescence of the product is less than or equal to 4, and the high-density drilling fluid can meet the fluorescence requirements of geological logging of exploratory wells and evaluation wells in oilfield exploitation.

Description

technical field [0001] The invention relates to the field of oilfield chemical technology, in particular to a well wall stabilizer propylene Fischer-Tropsch wax polymer for drilling fluid and a preparation method thereof. Background technique [0002] With the increase of drilling depth, the instability of the borehole wall and the difficulty of oil and gas reservoir protection become more and more demanding. The performance requirements of the drilling fluid are getting higher and higher, especially the performance of the drilling fluid is required to protect the oil reservoir well while maintaining the stability of the borehole wall. . Therefore, it is necessary to add a temperature-resistant and high-performance wellbore stabilizer to the drilling fluid to improve the inhibition and temperature resistance of the drilling fluid. Common well wall stabilizers include the following types. One is asphalt. Asphalt is the residue after crude oil refining. The well wall stabiliz...

AI Technical Summary

Problems solved by technology

Common well wall stabilizers include the following types. One is asphalt. Asphalt is the residue after crude oil refining. The well wall stabilizer obtained after certain processing of asphalt is mainly divided into oxidized asphalt, sulfonated Asphalt, natural asphalt and modified asphalt are widely used, but with the continuous development of oil exploration technology, the problem of oil and gas reservoir pollution is gradually paid attention to, and the environmental protection requirements of oil drilling are getting higher and higher, requiring the use of asphalt anti-slump agents and lignite Such anti-slump agents are no longer allowed to be used because they do not meet environmental protection requirements, pollute the environment due to their toxicity, and interfere with geological logging due to fluorescence.

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