Liquefied polymer fracturing liquid thickener and preparation method thereof

Abstract

The invention discloses a liquefied polymer fracturing liquid thickener, which has the following evaluation indexes: the density is 1.0-1.3g / cm<3>; the gelling time is less than or equal to 15s; and the viscosity of 1.0% the dissolved liquefied polymer fracturing liquid thickener is greater than or equal to 30mPa.s. The invention also discloses a method for preparing the liquefied polymer fracturing liquid thickener.

Description

technical field [0001] The present invention relates to an ultra-fast dissolving liquid polymer fracturing fluid thickener (hereinafter referred to as "liquid thickener") for convenience of description. [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 powdered solid fracturing fluid thickeners are generally used, such as guar gum dry powder, 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...

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 there is a special reason that the amount of fracturing fluid is insufficient or the fracturing scale needs to be temporarily increased, 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 cost of the liquid storage tank

[0014] With the current domestic and foreign water-based fracturing fluid demand for guar gum is rapidly increasing, the raw material guar beans cannot expand the planting range due to the limitation of growth conditions, resulting in a shortage of guar gum, and the price is also rising

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