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Continuously blended liquefied polymer thickener for fracturing construction

A technology of polymers and thickeners, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of fisheye and agglomeration, slow hydration speed, uneven dispersion, etc. clumping effect

Inactive Publication Date: 2014-12-10
CNPC BOHAI DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of these solid polymers in continuous mixing technology has the following difficulties: 1) need to add additional control devices to measure materials; 2) uneven dispersion, slow hydration rate, 3) easy to produce fish eyes and agglomeration

Method used

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  • Continuously blended liquefied polymer thickener for fracturing construction
  • Continuously blended liquefied polymer thickener for fracturing construction
  • Continuously blended liquefied polymer thickener for fracturing construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: the synthesis of organoclay

[0035] 1. Synthesis of organoclay sample A1

[0036] Add 100 g of Na-montmorillonite to 500 ml of deionized water, and stir vigorously for 10 minutes. Add 70 grams of dioctadecyldimethylammonium chloride as a treatment agent to the resulting suspension, heat the mixture to 80-90° C., and continue to stir for 12 hours. The precipitate generated by the reaction was filtered, and the filtrate was washed 3 times with 100 ml of deionized water. The filtrate was dried in a vacuum oven (90° C.) for 24 hours, and pulverized to obtain organoclay A1 whose modified component was dioctadecyldimethylammonium.

[0037] 2. Synthesis of organoclay sample A2

[0038] Add 100 g of Na-montmorillonite to 500 ml of deionized water, and stir vigorously for 10 minutes. Add 40 grams of cetyltrimethylammonium bromide as a treatment agent to the resulting suspension, heat the mixture to 80-90° C., and continue stirring for 12 hours. The precipitat...

Embodiment 2

[0039] Embodiment 2: formula test

[0040] Preparation of Reference Sample 1

[0041] Add 15.2 grams of liquid paraffin (produced by Tianjin Chemical Plant), 0.18 grams of methyl alcohol, and 0.55 grams of surfactant OP-10 in 100 milliliters of jars, stir vigorously for 10 minutes (1000 rev / min), continue to stir, The mixed liquid was slowly added with 10.5 grams of hydroxypropyl guar gum powder. After the addition was complete, the stirring was continued for 30 minutes, and the stirring was stopped to obtain Comparative Sample 1. Pour the sample into a graduated cylinder, observe the phenomenon, and record the time required for delamination to appear 5% clear liquid and 20% delamination. The results are shown in Table 1.

[0042] Preparation of reference sample 2

[0043] Add 15.2 grams of liquid paraffin (produced by Tianjin Chemical Plant), 0.41 grams of organoclay A1, and 0.18 grams of methanol in a 100ml wide-mouth bottle, stir vigorously for 10 minutes (1000 rpm), co...

Embodiment 3

[0048] Embodiment 3: the suspension test of polymer in liquid paraffin

[0049] Preparation of sample 5

[0050] Add 15.2 grams of liquid paraffin (produced by Tianjin Chemical Plant), 0.41g of organoclay A2, 0.18 grams of methyl alcohol, 0.55 grams of surfactant OP-10 in a 100ml wide-mouth bottle, stir vigorously for 10 minutes (1000 rpm ), continue to stir, slowly add 10.5 grams of hydroxypropyl guar gum powder in the mixed liquid. After the addition was complete, the stirring was continued for 30 minutes, and the stirring was stopped to obtain sample 5. Pour the sample into a graduated cylinder, observe the phenomenon, and record the time required for delamination to appear 5% clear liquid and 20% delamination. The results are shown in Table 1.

[0051] Preparation of sample 6

[0052] Add 15.2g of liquid paraffin (produced by Tianjin Chemical Plant), 0.41 gram of organoclay A1, 0.18 gram of methyl alcohol, 0.55 gram of surfactant OP-10 in a 100ml wide-mouth bottle, sti...

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Abstract

The invention discloses a continuously blended liquefied polymer thickener for fracturing construction. The liquid polymer comprises a hydrophilic polymer, a hydrophobic oily organic solvent and other additives, wherein the additives comprise quaternary ammonium modified organic clay, a polar solvent and a surfactant. The liquid polymer is prepared by feeding each component according to a certain feeding sequence and stirring. The prepared liquid polymer can be rapidly dissolved or swollen in water and can be used as the thickener in the fracturing fluid.

Description

technical field [0001] The invention relates to a polymer thickener for fracturing construction, especially a continuously compounded liquefied polymer thickener for fracturing construction. Background technique [0002] In the process of oil and gas field development, fracturing construction has become an indispensable part of improving storage and increasing production. During the fracturing construction process, construction personnel need to use a large amount of fluid, which we usually call fracturing fluid; this fluid is transported from the ground to the wellbore through a high-pressure pump, and generates pressure in the wellbore (the role of liquid pressure transmission); When the pressure is greater than the in-situ stress and rock tensile strength of the borehole wall, fractures will occur in the borehole wall. These newly formed fractures provide pathways for hydrocarbons to enter the wellbore. In order to maintain these fractures, we need to add proppants, suc...

Claims

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Application Information

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IPC IPC(8): C09K8/68
CPCC09K8/68C09K8/602C09K8/604C09K8/882C09K8/90
Inventor 何志勇屈贺幂牛增前党伟李青一蔡景超张秋红马如然周勋李伟
Owner CNPC BOHAI DRILLING ENG
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