Preparation method for alcohol ether modified guar and fracturing liquid system

A technology of guar gum and fracturing fluid, which is applied in the field of preparation of alcohol ether modified guar gum, which can solve problems affecting oil and gas production efficiency and damage to formation conductivity, achieve excellent sand-carrying effect and ensure sand-carrying effect Effect

Active Publication Date: 2018-02-23
山东广浦生物科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in order to increase the sand-carrying effect in field use, the use concentration of guar gum is relatively high, usually around 2

Method used

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  • Preparation method for alcohol ether modified guar and fracturing liquid system
  • Preparation method for alcohol ether modified guar and fracturing liquid system
  • Preparation method for alcohol ether modified guar and fracturing liquid system

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preparation example Construction

[0025] The invention provides a kind of preparation method of alcohol ether modified guar gum, comprising the following steps:

[0026] (1) The alcohol ether organic solution is mixed with the strong alkali solution, and the alkalization reaction is carried out to obtain the alcohol ether base;

[0027] (2) After adding the p-toluenesulfonyl chloride organic solution dropwise to the alcohol ether base obtained in the step (1), continue the sulfonation reaction to obtain the sulfonated alcohol ether; the dropping rate is 20-32mL / h ;

[0028] (3) After the organic solution of the sulfonated alcohol ether obtained is added dropwise to the alkalized solution of raw material guar gum, the grafting reaction is continued to obtain alcohol ether modified guar gum; the rate of adding is 8~10mL / h.

[0029] The invention mixes alcohol ether organic solution with strong alkali solution to carry out alkalization reaction to obtain alcohol ether base. In the present invention, the alcoho...

Embodiment 1

[0073] Dissolve 0.1moL diethylene glycol in 50ml tetrahydrofuran (THF) to obtain an alcohol ether organic solution; at the same time, weigh 0.2moL sodium hydroxide and dissolve it in 50ml water, mix the lye and alcohol ether organic solution and pour it into 250ml The three-necked flask was placed in an ice-water bath for 10 min under stirring conditions.

[0074] Weigh 0.1 mol of p-toluenesulfonyl chloride and dissolve it in 40ml THF, then transfer the whole volume to a constant pressure dropping funnel, drop it into a flask completed with an ice-water bath at 0-5°C, control the dropping speed, and finish dropping within 2 hours. Continue to react for 2.5 hours after dropping.

[0075] The whole mixture in the flask was transferred to 100ml ice water, and the 2 Cl 2 Extract 2 times, separate the lower layer oily liquid, then wash 2 times with water, then separate the lower layer oily liquid, use anhydrous MgSO 4 After drying, filtering and evaporating to dryness, the produ...

Embodiment 2

[0079] Dissolve 0.1moL triethylene glycol in 50ml tetrahydrofuran (THF) to obtain an alcohol ether organic solution; at the same time, weigh 0.2moL sodium hydroxide and dissolve it in 50ml water, mix the lye with the alcohol ether organic solution and pour it into 250ml The three-necked flask was placed in an ice-water bath for 20 min under stirring conditions.

[0080] Weigh 0.1 mol of p-toluenesulfonyl chloride and dissolve it in 40ml THF, then transfer the whole volume to a constant pressure dropping funnel, drop it into a flask completed with an ice-water bath at 0-5°C, control the dropping speed, and finish dropping within 2 hours. Continue to react for 2.5 hours after dropping.

[0081] The whole mixture in the flask was transferred to 100ml ice water, and the 2 Cl 2 Extract 2 times, separate the lower layer oily liquid, then wash 2 times with water, then separate the lower layer oily liquid, use anhydrous MgSO 4 Dry, filter and evaporate to dryness to obtain the prod...

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Abstract

The invention provides a preparation method for alcohol ether modified guar and a fracturing liquid. The preparation method comprises the following steps: by adopting a strong alkali solution, implementing alkalization treatment on alcohol ether to facilitate the reaction of the alcohol ether and paratoluensulfonyl chloride, and dropping a paratoluensulfonyl chloride organic solution into the alcohol ether alkali; further dropping sulfonated alcohol ether into a raw material, namely an alkalized solution of guar, implementing grafting so as to obtain alcohol ether modified guar, enriching oxygen atoms and hydroxyl in the structure of the guar, forming a three-dimensional stable structure with a cross-linking agent, furthermore performing sufficient hydration swelling under a low-temperature condition, releasing viscosity, and putting the guar into the fracturing liquid in a relatively low concentration, thereby ensuring the sand carrying effect of the fracturing liquid. Results of embodiments show that after alcohol ether modified guar prepared by using the preparation method is put into the fracturing liquid in the concentration of 0.1-0.3%, an excellent sand carrying effect can be still ensured, and no sedimentation is resulted within 24 hours.

Description

technical field [0001] The invention relates to the technical field of petroleum recovery additives, in particular to a preparation method of alcohol ether modified guar gum and a fracturing fluid. Background technique [0002] Along with the shale gas revolution in North America, reservoir stimulation technology is leading a major change in global unconventional oil and gas exploration and development, and has become the three key engineering technologies alongside geophysical prospecting and drilling. Reservoir reconstruction objects are extremely complex, including conventional reservoirs and unconventional reservoirs, and the physical properties of reservoirs include high permeability, low permeability and ultra-low permeability, and even tight reservoirs of Nadaxi level. In order to better implement reservoir stimulation, adaptive methods must be adopted for reservoir stimulation objects with different physical properties. Among them, hydraulic fracturing, as an importa...

Claims

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Application Information

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IPC IPC(8): C08B37/14C09K8/68
CPCC08B37/0096C09K8/605C09K8/685C09K2208/26
Inventor 宋纯亮朱虎谭长青刘贺朱凌霄
Owner 山东广浦生物科技有限公司
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