Energy-saving environment-friendly biogel fracturing fluid and preparation method thereof

An energy-saving and environmentally friendly bio-glue technology, which is applied to drilling compositions, production fluids, wellbore/well components, etc., can solve problems such as high prices, limited production of guar gum, damage to reservoirs, etc., and achieve stable escape routes Effect

Pending Publication Date: 2021-01-05
XIANYANG CHUANQING XINYUAN ENG TECHCO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] With the exploration and development of oil fields, on the one hand, the demand for guar gum has increased sharply, resulting in limited production, and the price of guar gum and its modified products in the market has been increasing day by day, and the supply is often i

Method used

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  • Energy-saving environment-friendly biogel fracturing fluid and preparation method thereof
  • Energy-saving environment-friendly biogel fracturing fluid and preparation method thereof
  • Energy-saving environment-friendly biogel fracturing fluid and preparation method thereof

Examples

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preparation example Construction

[0046] A preparation method of the above-mentioned energy-saving and environment-friendly bio-rubber fracturing fluid, comprising the following preparation process:

[0047] (1) Adding a water quality conditioner to clear water or flowback liquid, and then flushing and releasing evenly to obtain activated water, wherein the weight of the water quality conditioner is 0.02 to 0.05wt% of the water;

[0048] (2) Add bio-thickener to the activated water, the weight of bio-thickener is 1.5-2.5% of the activated water;

[0049] (3) Add granular solid proppant, and then add bio-gel breaker to obtain energy-saving and environment-friendly bio-rubber fracturing fluid.

[0050] Preferably, after adding the breaker, optionally add thiosulfate.

[0051] Preferably, the above preparation processes are all carried out at room temperature.

[0052] Preferably, the above preparation process can be carried out cyclically.

[0053] In the fracturing fluid of Examples 1-4, the composition form...

Embodiment 1

[0058] A method for preparing an energy-saving and environment-friendly bio-rubber fracturing fluid, comprising the following preparation process:

[0059] The weight fraction of raw materials is: 100 parts of gel breaker, 5 parts of thickener and 5 parts of regulator.

[0060] (1) Adding a regulating agent to clear water or flowback liquid, and then flushing and releasing evenly to obtain activated water, wherein the weight of the regulating agent is 0.03wt% of the water;

[0061] (2) adding a thickener in the activated water, the weight of the thickener is 2% of the activated water;

[0062] (3) Add sand and then add gel breaker to obtain energy-saving and environment-friendly bio-rubber fracturing fluid.

Embodiment 2

[0064] A method for preparing an energy-saving and environment-friendly bio-rubber fracturing fluid, comprising the following preparation process:

[0065] The weight fraction of raw materials is: 100 parts of gel breaker, 10 parts of thickener and 10 parts of regulator.

[0066] (1) Adding a regulating agent to clear water or flowback liquid, and then flushing and releasing evenly to obtain activated water, wherein the weight of the regulating agent is 0.03wt% of the water;

[0067] (2) adding a thickener in the activated water, the weight of the thickener is 2% of the activated water;

[0068] (3) Add sand and then add gel breaker to obtain energy-saving and environment-friendly bio-rubber fracturing fluid.

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Abstract

The invention relates to an energy-saving and environment-friendly biogel fracturing fluid which comprises the following components: a biological thickening agent containing one or combination of carrageenan, pectin, gelatin and flaxseed gum, a biological gel breaker containing metalloproteinase, and a water quality conditioning agent containing a hydrophobic group that can be easily bound to thehydrophobic group of the thickening agent. The biogel fracturing fluid disclosed by the invention has the technical effects that after the biogel fracturing fluid is continuously sheared for 1-6 hoursor more under the conditions that the temperature is 80 DEG C and the shearing rate is 170s <-1>, the viscosity of a fracturing fluid system can also be kept at more than 180MPa. S, the outstanding sand carrying capacity is realized at the temperature of 80 to 100 DEG C, friction resistance is low, the residue rate is low, and environmental friendliness is achieved.

Description

technical field [0001] The invention belongs to the field of petroleum shale gas exploitation, and in particular relates to an energy-saving and environment-friendly bio-glue fracturing fluid and a preparation method and application thereof. Background technique [0002] Oil and shale gas extraction is an important part of the national economy, especially in the context of global energy shortages, it is very important to further improve the efficiency of oil extraction. Fracturing is to use pressure to open the formation, form fractures and support it with proppant to reduce fluid flow resistance and increase production and injection measures. It is mainly used in low-permeability oil and gas reservoirs and carbonate oil and gas reservoirs. Water-based fracturing fluid is a working fluid used in fracturing construction. It is a heterogeneous and unstable chemical system formed by a variety of additives in a certain ratio. It can increase the conductivity of the wellbore and ...

Claims

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Application Information

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IPC IPC(8): C09K8/68C09K8/90E21B43/26E21B43/267
CPCC09K8/68C09K8/90C09K8/905C09K2208/24E21B43/26E21B43/267
Inventor 李万绪赵勇王芳远廖乐军何亚雄宁江松
Owner XIANYANG CHUANQING XINYUAN ENG TECHCO
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