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Water-in-oil associated non-crosslinked fracturing fluid concentrating and thickening agent and preparation method thereof and fracturing fluid

An associative, non-cross-linking technology, applied in the field of fracturing fluid, can solve the problems of affecting the application performance of fracturing fluid, insufficient dissolution, uneven mixing, etc., and achieve the increase of physical cross-linking network strength and obvious dissolution time , enhance the sand-carrying effect

Inactive Publication Date: 2017-07-07
SICHUAN GUANGYA POLYMER CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current continuous dispensing technology still has some deficiencies, such as the high labor intensity required for on-site preparation of fracturing fluid, the thickener dry powder feeding and dust, uneven mixing, and easy formation of "fish-eye" powder Particles, resulting in local gel agglomeration, insufficient dissolution, etc. affect the application performance of fracturing fluid; in addition, tens or even hundreds of cubic meters of fracturing fluid are prepared on the construction site, and the liquids, equipment and instruments involved greatly increase the construction cost. Cost and difficulty of construction

Method used

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  • Water-in-oil associated non-crosslinked fracturing fluid concentrating and thickening agent and preparation method thereof and fracturing fluid
  • Water-in-oil associated non-crosslinked fracturing fluid concentrating and thickening agent and preparation method thereof and fracturing fluid
  • Water-in-oil associated non-crosslinked fracturing fluid concentrating and thickening agent and preparation method thereof and fracturing fluid

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preparation example Construction

[0061] The present invention also provides a method for preparing the water-in-oil association type non-crosslinked fracturing fluid concentrated thickener, comprising the following steps:

[0062] A) mixing and stirring the dispersed phase, the dispersion medium and the composite emulsifier to obtain a water-in-oil emulsion;

[0063] B) adding a hydrophobic association polymer fracturing fluid thickener to the water-in-oil emulsion, and mixing and stirring to obtain a water-in-oil association type non-crosslinked fracturing fluid concentrated thickener.

[0064] In the present invention, firstly, the dispersed phase, the dispersed medium and the composite emulsifier are mixed and stirred to obtain the water-in-oil emulsion;

[0065] In the present invention, the mixing temperature is 35-70°C, preferably 40-65°C, more preferably 45-60°C; the mixing speed is 300-800rmp, preferably 400-600rmp; the mixing The stirring time is 20-40 minutes.

[0066] After the water-in-oil emuls...

Embodiment 1

[0081] Preparation of water-in-oil (W / O) associative non-crosslinked fracturing fluid concentrated thickener (compound emulsifier is tripolyglycerol diisostearate + stearic acid polyoxyethylene ether SG-6)

[0082] (1) A W / O association type non-crosslinked fracturing fluid concentrated thickener, comprising the following components in mass percentage:

[0083] 0# diesel oil 35.72%, water 35.72%, hydrophobic association type non-crosslinked fracturing fluid thickener (hereinafter referred to as "fracturing fluid thickener") 25%, triglycerol diisostearate 2.85%, Stearic acid polyoxyethylene ether SG-6 0.71%;

[0084] The fracturing fluid thickener is acrylamide / sodium acrylate / N-dodecyl substituted acrylamide copolymer, and the composite emulsifier is tripolyglycerol diisostearate and SG-6 (ratio 4:1), the preparation steps are as follows:

[0085] At 50°C, control the mass ratio of oil to water to 5:5, mix and emulsify 357.2g diesel, 357.2g water, 28.5g tripolyglycerol diiso...

Embodiment 2

[0095] Preparation of water-in-oil (W / O) associative non-crosslinked fracturing fluid concentrated thickener (compound emulsifier is zinc stearate + polyoxyethylene oleate A-105)

[0096] (1) A W / O association type non-crosslinked fracturing fluid concentrated thickener, comprising the following components in mass percentage:

[0097] 0# diesel oil 42.86%, water 28.57%, fracturing fluid thickener 25%, zinc stearate 2.14%, polyoxyethylene oleate A-105 1.43%;

[0098] The fracturing fluid thickener is acrylamide / sodium acrylate / tetradecyl acrylate copolymer, and the composite emulsifier is zinc stearate and A-105 (ratio 3:2), and the preparation steps are as follows :

[0099] At 50°C, control the mass ratio of oil to water to 6:4, mix and emulsify 428.6g diesel, 285.7g water, 21.4g zinc stearate, 14.3g A-105, stir at 600rmp for 30min to form a stable oil Water-in-emulsion, finally add 250g of fracturing fluid thickener, and form a uniform and stable W / O associative non-crossl...

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Abstract

The invention provides a water-in-oil associated non-crosslinked fracturing fluid concentrating and thickening agent, which is prepared from the following components in percentage by mass: 25-50wt% of a dispersion medium, 18-40wt% of a disperse phase, 20-40wt% of a hydrophobic associated polymer fracturing fluid thickening agent and 2.5-6wt% of a compound emulsifier, wherein the dispersion medium is an organic solvent incompatible with water; the disperse phase is water; the compound emulsifier is the compound emulsifier compounded by an emulsifier of which the HLB value is 3-7 and an emulsifier of which the HLB value is 8-10; and the sum of the content of various components is 100wt%. The stabilization time of the prepared concentrating and thickening agent is greater than 120d and the dissolution time is smaller than 1min. The solution property of the fracturing fluid prepared from the concentrating and thickening agent is superior to that of the fracturing fluid which is directly prepared from corresponding fracturing fluid thickening agent dry powder.

Description

technical field [0001] The invention belongs to the field of fracturing fluid technology, and in particular relates to a water-in-oil association type non-crosslinked fracturing fluid concentrated thickener, a preparation method thereof and a fracturing fluid. Background technique [0002] Fracturing fluid is an important technical measure for increasing production of oil and gas wells and increasing injection of water wells. People use the surface high-pressure pump group to inject high-viscosity liquid into the well with a displacement that greatly exceeds the energy absorbed by the formation. With the formation of high pressure near the bottom of the well, after the pressure exceeds the ground stress near the bottom of the well and the expansion strength of the rock, the fracture extends forward and fills the proppant in the fracture, and a sufficient length can be formed in the formation after the pump is stopped. , sand-filled cracks of a certain width and height. It ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
CPCC09K8/68C09K2208/26
Inventor 郭拥军杨雪杉毛慧斐陈航宇
Owner SICHUAN GUANGYA POLYMER CHEM
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