Water-based drilling fluid high-temperature-resistant tackifying rheology modifier, and preparation method thereof, and drilling fluid

Abstract

The invention relates to a water-based drilling fluid high-temperature-resistant tackifying rheology modifier, and a preparation method thereof, and a drilling fluid, and belongs to the technical field of oil field drilling fluids. According to the present invention, the water-based drilling fluid high-temperature-resistant tackifying rheology modifier is a starch micro-gel, and the starch micro-gel has an average particle size of 100-500 nm, preferably 100-300 nm, more preferably 100-200 nm, and is preferably a spherical particle; the high-temperature-resistant soilless phase water-based drilling fluid uses the starch micro-gel as the high-temperature-resistant tackifying rheology modifier, such that the problem of the insufficient temperature resistance of the tackifying rheology modifier commonly used in the existing soilless phase water-based drilling fluid is overcome; and the drilling fluid containing the tackifying rheology modifier can provide the good tackifying rheology effect at a high temperature of 150 DEG C, such that the soilless phase water-based drilling fluid system can be used for horizontal wells with a well temperature of about 150 DEG C, and the good application prospects can be achieved.

Description

technical field

[0001] The invention relates to the technical field of oilfield drilling fluids, and more particularly, relates to a water-based drilling fluid anti-high temperature viscosity increasing and cutting agent, a preparation method thereof and drilling fluid. Background technique

[0002] With the depletion of oil and gas resources, deep horizontal well drilling has gradually become an important technical means to develop deep oil and gas reservoirs. Due to the deep burial of oil and gas reservoirs and deep build-up points, there are high friction and torque during the drilling process of the build-up section and horizontal section of deep horizontal wells, which not only seriously affects the drilling speed and wellbore trajectory control, but also threatens the drilling process. The safety of operation is the core problem restricting the extension length of the horizontal section of deep horizontal wells, which puts forward higher requirements on the lubricating...

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