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Liquid thickening agent system and application thereof

A liquid thickener and system technology, which is applied in the fields of production fluids, chemical instruments and methods, wellbore/well components, etc., can solve the problems of inability to complete the construction, affecting the fracturing effect, insufficient preparation of raw glue, etc. Small space, meet the needs of seawater fracturing, and make up for the lack of offshore fracturing

Active Publication Date: 2015-08-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, there will often be problems with the storage and transportation of the fracturing fluid and the cleaning of the large tank after fracturing. If there is an abnormal construction or insufficient preparation of the original glue solution during the construction, the construction cannot be completed, which will seriously affect the fracturing effect (Yin Bencai et al., Instant Dissolving Research and application of guar gum fracturing fluid (Oilfield Chemistry, June 2012)

Method used

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  • Liquid thickening agent system and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Pour 40g of white oil into the container, add 50g of hydroxypropyl guar gum, 2g of chloroform-acetone (1:3 volume ratio mixed solution), and 801g of Span-801g while stirring. Take 8.3g of distilled water, dissolve 0.1g of cetyltrimethylammonium bromide (CTAB) under stirring, and slowly add 0.1g of polyester fiber under rapid stirring after the dissolution is complete. The prepared aqueous solution is slowly poured into the organic solution in a stirring state to complete the preparation of a liquid hydroxypropyl guar gum system with an active substance content of 50%. The 170s-viscosity measured with a six-speed viscometer at room temperature is 78mPa·s. Prepare 0.5% hydroxypropyl guar gum solution: take 100ml of tap water and add 1% liquid hydroxypropyl guar gum system, stir at 800r / min for 3 minutes, measure 170s with a six-speed viscometer--viscosity is 193mPa s; Add 1ml of liquid hydroxypropyl guar gum system to 100ml of artificial seawater, stir at 800r / min for 3 ...

Embodiment 2

[0028] Take 35g of white oil and pour it into the container, add 55g of hydroxypropyl guar gum, 1g of chloroform-acetone (1:3 volume ratio mixed solution) and 1.5g of Span-80 while stirring. Take 7.3g of distilled water, dissolve 0.1g of CTAB under stirring, and slowly add 0.1g of polyester fiber under rapid stirring after the dissolution is complete. Slowly pour the prepared aqueous solution into the organic solution in a stirring state to complete the preparation of a liquid hydroxypropyl guar gum system with an active matter content of 55%. Use a room temperature six-speed viscometer to measure 170s-the viscosity is 85mPa s; prepare a hydroxypropyl guar gum solution with a concentration of about 0.5%: take 100ml of a certain amount of tap water and add 1g of liquid hydroxypropyl guar gum system, 800r / min Stir for 3 minutes, measure 170s with a six-speed viscometer - the viscosity is 231mPa s; take 100ml of artificial seawater, add 1g of liquid hydroxypropyl guar gum system,...

Embodiment 3

[0030]Weigh 35g of white oil and pour it into a container, add 50g of hydroxypropyl guar gum, 2g of chloroform-acetone (1:3 volume ratio mixed solution), and 1.5g of Span-80 while stirring. Take 10.5g of distilled water and dissolve 0.5g of CTAB under stirring. After the dissolution is complete, slowly add 0.5g of polyester fiber under rapid stirring. Slowly pour the prepared aqueous solution into the organic solution in a stirring state to complete the preparation of a liquid hydroxypropyl guar gum system with an active matter content of 55%. Measured with a room temperature six-speed viscometer at 170s-viscosity is 56mPa s; Take 100ml of tap water and add 1g liquid hydroxypropyl guar gum system, stir at 800r / min for 3 minutes, six-speed viscometer measures 170s-viscosity is 201mPa s; Take 100ml of artificial seawater, add 1g of liquid hydroxypropyl guar gum system, stir at 800r / min for 3 minutes, measure 170s with a six-speed viscometer - the viscosity is 209mPa·s.

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Abstract

The invention discloses a liquid thickening agent system including an organic solvent, a plant gum thickener, an organic thickener, an emulsifier and water. According to the thickening agent system disclosed by the invention, the thickening agent system is easy to prepare and has a certain salt resistance; the thickening agent system is fast to swell when used for being mixed with water to prepare a fracturing fluid, the requirement on preparing water is low, and even if sea water (containing salt) is used, the swelling effect of the thickening agent is also not affected.

Description

technical field [0001] The invention belongs to the field of oil field exploitation, and in particular relates to a liquid thickener system. The present invention also relates to the use of the above-mentioned fracturing thickener system. Background technique [0002] Hydraulic fracturing is a method of using hydraulic action to form fractures in the formation. The construction process is to use a fracturing vehicle to squeeze a high-pressure, large-displacement liquid with a certain viscosity into the formation. After pressing out many cracks in the formation, add proppant (such as quartz sand, etc.) to fill the cracks and improve the permeability of the formation. Increase water injection (water injection wells) or oil production (oil wells). The most commonly used fracturing system is the water-based fracturing fluid system. [0003] With the development of the petroleum industry, hydraulic fracturing technology has also developed rapidly, especially since the late 198...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68E21B43/26
Inventor 张大年赵梦云苏长明苏建政张汝生龙秋莲史爱萍张锁兵郑承纲林鑫
Owner CHINA PETROLEUM & CHEM CORP
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