Boron cross-linking agent for fracturing fluid and preparation method thereof and ultralow hydroxypropylguar gum concentration fracturing fluid prepared from boron cross-linking agent

A technology of ultra-low hydroxypropyl guanidine and hydroxypropyl guanidine, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problem of high residue content, achieve improved cross-linking sites, and good sand-carrying performance , the effect of increasing size

Inactive Publication Date: 2016-07-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recently, Chinese patent CN102329602A discloses an ultra-low-concentration fracturing fluid system. The concentration of hydroxypropyl guar gum disclosed in it is 0.3-0.35%, which can make the temperature resistance of fracturing fluid reach 105°C, but there is a high residue , and the temperature resistance needs to be further improved
[0004] Chinese patent CN102732244A discloses an organoboron crosslinking agent, which can achieve effective crosslinking under the condition of 0.15% to 0.3% weight concentration of hydroxypropyl guar gum, and the temperature resistance of fracturing fluid is 50 to 120°C, but it needs to be further reduced Hydroxypropyl concentration improves the temperature resistance of fracturing fluid

Method used

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  • Boron cross-linking agent for fracturing fluid and preparation method thereof and ultralow hydroxypropylguar gum concentration fracturing fluid prepared from boron cross-linking agent
  • Boron cross-linking agent for fracturing fluid and preparation method thereof and ultralow hydroxypropylguar gum concentration fracturing fluid prepared from boron cross-linking agent
  • Boron cross-linking agent for fracturing fluid and preparation method thereof and ultralow hydroxypropylguar gum concentration fracturing fluid prepared from boron cross-linking agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] This example provides a boron crosslinking agent for fracturing fluid and the ultra-low hydroxypropyl guar gum concentration fracturing fluid prepared therefrom.

[0059] The boron crosslinking agent for fracturing fluid provided in this embodiment contains the following components in parts by weight:

[0060] 20 parts of 1,1-cyclohexyl diacetic acid monoamide;

[0061] 40 parts of water;

[0062] 50 parts of ethylene glycol;

[0063] 13 parts of boric acid;

[0064] 20 parts of n-butanol;

[0065] 30 parts of glyoxal;

[0066] The preparation steps of described linking agent are as follows:

[0067] Stir and mix n-butanol and ethylene glycol (37.5 parts) evenly, add boric acid under stirring condition, and then use a water separator to separate water at 150° C. until the reaction is completed to obtain a mixture after water separation. Cool to room temperature, add 1,1-cyclohexyl diacetic acid monoamide to the above mixture, stir the reaction at 110°C for 3 hours...

Embodiment 2

[0078] This example provides a boron crosslinking agent for fracturing fluid and the ultra-low hydroxypropyl guar gum concentration fracturing fluid prepared therefrom.

[0079] The boron crosslinking agent for fracturing fluid provided in this embodiment contains the following components in parts by weight:

[0080] 25 parts of N-butylbenzenesulfonamide;

[0081] 40 parts of water;

[0082] 80 parts of ethylene glycol;

[0083] 13 parts of boric acid;

[0084] 25 parts of n-butanol;

[0085] 35 parts of glyoxal;

[0086] The preparation steps of described linking agent are as follows:

[0087] Stir and mix n-butanol and ethylene glycol (60 parts) evenly, add boric acid under stirring condition, and then use a water separator to separate water at 150° C. until the reaction is completed to obtain a mixture after water separation. Cool to room temperature, add N-butylbenzenesulfonamide to the above mixture, stir the reaction at 110°C for 3 hours, stop heating, add water an...

Embodiment 3

[0098] This example provides a boron crosslinking agent for fracturing fluid and the ultra-low hydroxypropyl guar gum concentration fracturing fluid prepared therefrom.

[0099] The boron crosslinking agent for fracturing fluid provided in this embodiment contains the following components in parts by weight:

[0100] 30 parts of N-ethyl p-toluenesulfonamide;

[0101] 50 parts of water;

[0102] 100 parts of ethylene glycol;

[0103] 20 parts of boric acid;

[0104] 30 parts of n-butanol;

[0105] 40 parts of glyoxal;

[0106] The preparation steps of described linking agent are as follows:

[0107] Stir and mix n-butanol and ethylene glycol (75 parts) evenly, add boric acid under stirring condition, and then use a water separator to separate water at 150° C. until the reaction is completed to obtain a mixture after water separation. Cool to room temperature, add N-ethyl p-toluenesulfonamide to the above mixture, stir the reaction at 120°C for 4 hours, then stop heating, ...

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Abstract

The invention relates to a boron cross-linking agent for a fracturing fluid in the technical field of oil-gas field development and an ultralow hydroxypropylguar gum concentration fracturing fluid prepared from the boron cross-linking agent. The cross-linking agent comprises the following ingredients (by weight): 20-30 parts of an amide compound, 40-60 parts of water, 50-100 parts of glycol, 13-25 parts of boric acid, 20-30 parts of n-butanol and 30-40 parts of an aldehyde compound. The ultralow hydroxypropylguar gum concentration fracturing fluid contains (by volume): 98.6-98.9 parts of a hydroxypropylguar gum aqueous solution and 0.6-0.9 part of the boron cross-linking agent for a fracturing fluid. By the use of the cross-linking agent and under the precondition of guaranteeing performance of the fracturing fluid, hydroxypropylguar gum concentration can be reduced by more than 30%, thus lowering costs of the fracturing fluid and decreasing damage to the bottom layer.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, and more particularly relates to a boron crosslinking agent for fracturing fluid and an ultra-low hydroxypropyl guaridine concentration fracturing fluid prepared therefrom. Background technique [0002] With the continuous increase of horizontal well staged fracturing stimulation technology at home and abroad, the demand for hydroxypropyl guar gum continues to increase. Guanidine collagen materials are mainly controlled by foreign countries, and the price fluctuates greatly. Reducing the concentration of hydroxypropyl guar gum can reduce the cost of fracturing fluid and stabilize the contradiction between supply and demand. [0003] Boron cross-linking agent is currently the most widely used cross-linking agent for water-based fracturing fluids. However, traditional boron cross-linking agents can only achieve cross-linking when the concentration of guar gum is greater than 0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
Inventor 贾文峰陈作姚奕明蒋廷学张旭东王宝峰魏娟明杜涛徐胜强曲海
Owner CHINA PETROLEUM & CHEM CORP
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