Water base guanidine gum fracturing fluid and preparation method thereof

A guar gum fracturing fluid and water-based technology, applied in the field of water-based guar gum fracturing fluid and its preparation, can solve the problems of large amount of guar gum, high residue content of water-based guar gum fracturing fluid, and high cost of fracturing fluid problems, achieve the effect of reducing dosage, increasing viscosity and sand-carrying ability, and reducing residue content

Inactive Publication Date: 2013-06-19
BEIJING RECHSAND SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the problems of high residue content of water-based guar gum fracturing fluid and high cost of fracturing fluid caused by the large amount of guar gum used in the prior art, and then provide a kind of water-based guar gum fracturing fluid with strong sand-carrying ability and low cost. Water-based guar gum fracturing fluid with low guar content

Method used

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  • Water base guanidine gum fracturing fluid and preparation method thereof
  • Water base guanidine gum fracturing fluid and preparation method thereof
  • Water base guanidine gum fracturing fluid and preparation method thereof

Examples

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Embodiment 1

[0027] The water-based guar gum fracturing fluid A described in this embodiment comprises the following components: 0.05 g of hydroxypropyl guar gum, 0.005 g of borax, 0.2 g of ammonium persulfate, 0.5 g of carboxymethyl cellulose, 1.645 g of sodium carbonate solution with a concentration of 3wt% to make the pH value of the fracturing fluid system 9, and 97.6 g of water.

[0028] The preparation method of water-based guar gum fracturing fluid described in the present embodiment is as follows:

[0029] (1) Dissolve the above-mentioned specified amount of hydroxypropyl guaridine gum in 70g of water, mix well, and obtain thickened water;

[0030] (2) Dissolve the above-mentioned specific amount of borax in 27.6g of water, and mix well to obtain an aqueous solution of crosslinking agent;

[0031] (3) Adjust the pH value of the above-mentioned thickened water to 9 with the above-mentioned specific amount of sodium carbonate solution, and then slowly add the cross-linking agent aqu...

Embodiment 2

[0034] The water-based guar gum fracturing fluid B described in this embodiment comprises the following components: 0.07 g of carboxymethyl guar gum, 0.007 g of borax, 0.3 g of potassium persulfate, 1.0 g of hydroxyethyl cellulose, 0.523 g of sodium hydroxide solution with a concentration of 6 wt% to make the pH value of the fracturing fluid system 9.5, and 98.1 g of water.

[0035] The preparation method of water-based guar gum fracturing fluid described in the present embodiment is as follows:

[0036] (1) Dissolve the above-mentioned specific amount of carboxymethyl guar gum in 70g of water, mix well to obtain thickened water;

[0037] (2) Dissolve the above-mentioned specific amount of borax in 28.1g of water, mix well to obtain an aqueous solution of crosslinking agent;

[0038] (3) Adjust the pH value of the above-mentioned thickened water to 9.5 with the above-mentioned specific amount of sodium hydroxide solution, and then slowly add the cross-linking agent aqueous so...

Embodiment 3

[0041] Water-based guar gum fracturing fluid C described in the present embodiment comprises the following components: 0.10 g of guar gum, 0.01 g of borax, 0.4 g of potassium persulfate, 1.4 g of hydroxypropyl cellulose, 1.09 g of The pH value of the fracturing fluid system is 10, the concentration is 5wt% potassium carbonate solution, and 97g of water.

[0042] The preparation method of water-based guar gum fracturing fluid described in the present embodiment is as follows:

[0043] (1) Dissolve the above-mentioned specific amount of guar gum in 70g of water, mix well to obtain thickened water;

[0044](2) Dissolve the above-mentioned specified amount of borax in 27g of water, mix evenly, and obtain an aqueous solution of the crosslinking agent;

[0045] (3) Adjust the pH value of the above-mentioned thickened water to 10 with the above-mentioned specific amount of potassium carbonate solution, and then slowly add the cross-linking agent aqueous solution into the thickened w...

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Abstract

The invention provides water base guanidine gum fracturing fluid, and belongs to the field of oil field fracturing technologies. The water base guanidine gum fracturing fluid comprises the following ingredients: guanidine gum derivative, cross-linking agents, gel breakers, thickening agents, PH value adjusting agents and water. The invention further provides a water base guanidine gum fracturing fluid preparation method. The method includes the following steps of (1) dissolving gelatinizing agents in the water, evenly mixing, and obtaining thickened water; (2) dissolving the cross-linking agents in the water, evenly mixing and obtaining cross-linking agent water solution; (3) adjusting the PH value of the thickened water to 9-10, then slowly adding the cross-linking agent water solution into the thickened water to obtain jelly solution; (4) and adding the thickening agents into the jelly solution, and finally adding the gel breakers to obtain the water base guanidine gum fracturing fluid. The water base guanidine gum fracturing fluid is low in sludge content after gel breaking, and meanwhile the cost of the water base guanidine gum fracturing fluid is greatly reduced.

Description

technical field [0001] The invention relates to a water-based guar gum fracturing fluid and a preparation method thereof, belonging to the technical field of oilfield fracturing. Background technique [0002] In the middle and late stages of oilfield exploitation, hydraulic fracturing has been developed rapidly and widely used as the main stimulation measure of oil and gas reservoirs. Hydraulic fracturing is the use of surface high-pressure pumps to squeeze fracturing fluid with high viscosity into the oil layer through the wellbore. When the injection rate of the fracturing fluid exceeds the absorption capacity of the oil layer, a high pressure will be formed on the oil layer at the bottom of the well. When this pressure exceeds the fracture pressure of the reservoir rock near the bottom of the well, the reservoir will be pushed apart and fractures will occur. At present, the commonly used fracturing fluids at home and abroad are water-based fracturing fluid, oil-based fra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
Inventor 秦升益王中学胡宝苓王光许智超钟毓娟
Owner BEIJING RECHSAND SCI & TECH GRP
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