A kind of preparation method of anti-high temperature binary copolymerization low molecular weight polyamine inhibitor for water-based drilling fluid

Abstract

The invention relates to a preparation method of a high-temperature-resistant binary copolymerization low-molecular-weight polyamine inhibitor for water-based drilling fluid. It mainly solves the problems of poor temperature resistance and stability of the existing inhibitors. The preparation method of the inhibitor is composed of monomer A and monomer N-vinylpyrrolidone in a molar ratio of 1:2 to 1:10, under the action of metal catalysts such as sodium borohydride and Raney nickel, through catalytic hydrogenation The method is a low-molecular-weight polymer inhibitor synthesized by aqueous solution polymerization through multi-step reaction. The water-based drilling fluid uses a high-temperature resistant binary copolymer low-molecular-weight polyamine inhibitor, which has stronger temperature resistance and stability, can improve the inhibitory effect of the water-based drilling fluid on the shale formation, improve the stability of the well wall, and reduce downhole complex, promote the advancement of water-based drilling fluid technology and the smooth progress of oil and gas exploration.

Description

Preparation of high temperature resistant binary copolymer low molecular weight polyamine inhibitor for water-based drilling fluid backup method Technical field: The present invention relates to the technical field of synthetic preparation of water-soluble organic polymers for oil drilling, especially a kind of water-based The invention discloses a preparation method of high temperature resistant binary copolymer low molecular weight polyamine inhibitor for drilling fluid. Background technique: The instability of wellbore in mud shale formation is a technical problem that is often encountered in drilling engineering, and every year gives world oil Industry causes losses of at least about $600 million and consumes about 5% to 6% of the total drilling time. According to statistics It is shown that shale formations account for 70% of the total formations drilled, and more than 90% of the wellbore instability problems occur in shale formations. water sensitive Active...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the problems of poor temperature resistance and poor stability of existing inhibitors in the background technology, and provides a method for preparing a high-temperature resistant binary copolymerized low-molecular-weight polyamine inhibitor for water-based drilling fluids. The water-based drilling fluid The anti-high temperature binary copolymerization low molecular weight polyamine inhibitor for liquid has stronger temperature resistance and stability, which can improve the inhibitory effect of water-based drilling fluid on shale formations, improve the stability of the well wall, reduce downhole complexity, and promote water-based drilling. Advances in base drilling fluid technology and smooth oil and gas exploration

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