High temperature resistant non-fluorescence anti-sloughing nano-filtrate reducer and preparation method thereof

Abstract

The invention discloses a high temperature resistant non-fluorescence anti-sloughing nano-filtrate reducer and a preparation method of the high temperature resistant non-fluorescence anti-sloughing nano-filtrate reducer. The anti-sloughing nano-filtrate reducer is synthesized of at least one non-water-soluble monomer and at least one water-soluble monomer with amino or sulfonic acid group by using an emulsion polymerization method in a non-oxygen environment under the condition of stirring. The nanoscale of the anti-sloughing nano-filtrate reducer is 10nm-5,000nm, the surface of the anti-sloughing nano-filtrate reducer contains the amino group with an inhibition function or sulfonic acid base or sulfonic acid group with strong temperature resistance, and the anti-sloughing nano-filtrate reducer has a core-shell structure. The reduction rate of shale swelling inhibition can be more than 70%, the reduction rate of medium pressure filtration can be more than 50%, and the rheological properties of drilling fluid are not significantly affected. After the drilling fluid containing the prepared anti-sloughing filtrate reducer is subjected to hot rolling at 220 DEG C, the performance of the drilling fluid is not significantly changed, so that the anti-sloughing filtrate reducer has a good high temperature resistant effect. The anti-sloughing filtrate reducer has very good application prospect in the term of anti-sloughing inhibition.

Description

technical field [0001] The invention relates to nanometer materials used in the field of drilling fluids, in particular to a high-temperature-resistant and non-fluorescent nanometer anti-slump fluid loss reducing agent used in the field of oil or natural gas drilling fluids and a preparation method thereof. Background technique [0002] Wellbore instability during drilling has always been the main factor affecting the smooth progress of drilling. Generally speaking, anti-slump agent and fluid loss control agent are added at the same time on site to solve this problem. At present, the high temperature resistance of anti-slump agents and fluid loss reducers is generally not high, generally not exceeding 180°C, and most of the fluid loss reducers are linear polymers, which will increase the viscosity of drilling fluid at high temperatures. Moreover, adding anti-slump agent and fluid loss reducer at the same time not only increases the cost of drilling fluid, but also increases...

AI Technical Summary

Problems solved by technology

At present, the high temperature resistance of anti-slump agents and fluid loss reducers is generally not high, generally not exceeding 180°C, and most of the fluid loss reducers are linear polymers, which will increase the viscosity of drilling fluid at high temperatures

The addition of anti-slump agent and fluid loss reducer at the same time not only increases the cost of drilling fluid, but also increases the labor intensity of workers. At the same time, the composition of drilling fluid is complicated, and the maintenance and treatment are more difficult. Therefore, an anti-slump and fluid loss treatment with high temperature resistance is designed and synthesized. agent imperative

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