Oil-based liquid-state fracturing fluid thickening agent, and preparation method thereof

Abstract

The invention discloses an oil-based liquid-state fracturing fluid thickening agent, and preparation method thereof. Density of the oil-based liquid-state fracturing fluid thickening agent ranges from 0.9 to 1.2g / cm<3>; gelling time is 20s or less; and viscosity of 1.2% of the oil-based liquid-state fracturing fluid thickening agent after dissolving is 30mPa.s or more. The invention also discloses a preparation method of the oil-based liquid-state fracturing fluid thickening agent.

Description

technical field [0001] The invention relates to an ultra-fast dissolving oil-based liquefied fracturing fluid thickener (hereinafter referred to as "liquefied thickener"). [0002] The present invention also relates to a method for preparing the above-mentioned liquefied thickener. Background technique [0003] Water-based fracturing fluid is an important technology for enhancing oil and gas recovery. In the water-based fracturing process, fine powder solid fracturing fluid thickeners are generally used, such as natural polymers, synthetic polymer thickener dry powder, etc. The dispersibility and hydration viscosity of the thickener determine the fracturing construction technology, fracturing quality and fracturing cost. [0004] The current fracturing construction technology is generally as follows: [0005] The first step is to prepare the base liquid, disperse the thickener dry powder in water, and fully swell within a certain period of time to form a base liquid with ...

AI Technical Summary

Problems solved by technology

[0008] 1) The preparation of base liquid not only requires special equipment for mixing dry powder and water, but also easily produces "fish eyes" of different sizes and local agglomeration, which affects the quality of the base liquid;

[0009] 2) The construction flexibility is small. If the fracturing fluid volume is insufficient or the fracturing scale needs to be temporarily increased due to special reasons, it cannot be realized on site;

[0010] 3) There are many types of admixtures required, and the admixture steps are cumbersome, which increases the difficulty of controlling the quality of fracturing fluids;

[0011] 4) The hydration and swelling time of thickener dry powder is long (more than 10 minutes), which increases the consumption of manpower and material resources;

[0012] 5) There is a large amount of base fluid residue (10-30%) in the liquid storage tank after fracturing, which increases the cleaning and treatment costs of the liquid storage tank