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Oil-in-water association-type non-crosslinking fracturing fluid concentrating thickener and preparation method thereof and fracturing fluid

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

Inactive Publication Date: 2017-06-23
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. For example, the on-site preparation of the fracturing fluid requires a lot of work, and the dry powder of the thickener has a large amount of dust and uneven mixing, which is easy to form "fish-eye" particles. , resulting in partial jelly agglomeration, insufficient dissolution, which affects the performance of the 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 and construction cost. difficulty

Method used

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  • Oil-in-water association-type non-crosslinking fracturing fluid concentrating thickener and preparation method thereof and fracturing fluid
  • Oil-in-water association-type non-crosslinking fracturing fluid concentrating thickener and preparation method thereof and fracturing fluid
  • Oil-in-water association-type non-crosslinking fracturing fluid concentrating thickener 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 above-mentioned oil-in-water 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 an oil-in-water emulsion;

[0063] B) adding a hydrophobic association polymer fracturing fluid thickener to the oil-in-water emulsion, mixing and stirring to obtain an oil-in-water 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 oil-in-water emulsion;

[0065] In the present invention, the mixing and stirring temperature is 35-70°C, preferably 40-65°C, more preferably 50-60°C; the mixing and stirring speed is 300-800rmp, preferably 400-700rmp; the mixing The stirring time is 20-60 minutes...

Embodiment 1

[0081] Preparation of oil-in-water (O / W) associative non-crosslinked fracturing fluid concentrated thickener (compound emulsifier is fatty alcohol polyoxyethylene ether AEO-3 + alkyl glycoside APG1214)

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

[0083] 0# diesel oil 28.71%, water 43.06%, hydrophobic association polymer fracturing fluid thickener (hereinafter referred to as fracturing fluid thickener) 25%, fatty alcohol polyoxyethylene ether AEO-3 2.87%, alkyl glycoside APG1214 0.36%;

[0084] The fracturing fluid thickener is acrylamide / sodium acrylate / N-dodecyl substituted acrylamide copolymer, and the composite emulsifier is AEO-3 and APG1214 (ratio 8:1), and the preparation steps are as follows :

[0085] At 60°C, control the mass ratio of oil to water to 4:6, mix 287.1g diesel, 430.6g water, 28.7g AEO-3, 3.6g APG1214 to emulsify evenly, stir at 600rmp for 30min to form ...

Embodiment 2

[0095] Preparation of oil-in-water (O / W) associative non-crosslinked fracturing fluid concentrated thickener (compound emulsifier is lauryl polyoxyethylene ether LAE-4+polyethylene glycol dioleate PEG600DO)

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

[0097] 0# diesel oil 28.71%, water 43.06%, fracturing fluid thickener 25%, lauric acid polyoxyethylene ether LAE-42.87%, polyethylene glycol dioleate PEG600DO 0.36%;

[0098] The fracturing fluid thickener is acrylamide / sodium acrylate / N-vinylpyrrolidone / cetyl acrylate copolymer, and the composite emulsifier is LAE-4 and PEG600DO (ratio 8:1), The preparation steps are as follows:

[0099] At 40°C, control the mass ratio of oil to water to 4:6, mix 287.1g diesel, 430.6g water, 28.7g LAE-4, 3.6g PEG600DO to emulsify evenly, stir at 600rmp for 30min to form a stable oil-in-water emulsion , and finally add 250g of fracturing fluid ...

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Abstract

The invention provides an oil-in-water association-type non-crosslinking fracturing fluid concentrating thickener, which is prepared from the following components in percentages by weight: 18-50wt% of a dispersion medium, 18-50wt% of a dispersion phase, 20-40wt% of a hydrophobic associated polymer fracturing fluid thickener and 2.5-6wt% of a compound emulsifier, wherein the dispersin medium is water; the dispersion phase is an organic solvent incompatible with water; the compound emulsifier is compounded by an emulsifier of which the HLB value is 7-10 and an emulsifier of which the HLB value is 11-14; and the sum of the content of the components is 100wt%. According to the prepared concentrating thickener, the stability time is greater than 120d and the dissolution time is smaller than 1min. A fracturing liquid prepared from the prepared concentrating thickener is superior to a fracturing liquid which is directly prepared from dry powder of the corresponding fracturing fluid thickener in solution performance.

Description

technical field [0001] The invention belongs to the field of fracturing fluid technology, and in particular relates to an oil-in-water 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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IPC IPC(8): C09K8/68C09K8/88
CPCC09K8/68C09K8/602C09K8/882
Inventor 郭拥军杨雪杉毛慧斐陈航宇
Owner SICHUAN GUANGYA POLYMER CHEM
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