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Method for manufacturing fracturing fluid

A technology of fracturing fluid and base fluid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as excellent dispersion stability, no dispersion suspension, and no research ideas for guar gum substitutes, etc. Achieve the effect of small damage and reduce potential damage

Inactive Publication Date: 2014-01-08
山东金晓阳生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, at present, researchers still limit their research ideas to polyacrylamide and its modified products with excellent viscosity increasing and hanging properties, and believe that high viscosity and hanging properties dominate the sand suspension properties of fracturing fluids, and the research has never involved dispersion suspension. Its stability can dominate the sand-suspension property of fracturing fluid, excellent dispersion stability, and long-term suspension of sand, so far no research ideas and real substitutes for guar gum have been found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]Thickener is the preparation of fracturing fluid high-viscosity glue: pre-prepared 1.45 parts by weight of sodium hydroxide solution with a mass concentration of 48%, and then mixed 0.3 parts by weight of sodium tetraborate, 0.013 parts by weight of o-phenylenediamine, and 0.015 parts by weight of thiourea and 1.95 parts by weight of 95% ethanol (wt.) were mixed uniformly in the above-mentioned sodium hydroxide solution, the heat was released during the mixing process, the system was cooled to below 15°C, pumped into the kneader, and 1 part by weight of Refined cotton, after the feeding is completed, close the feeding port of the kneader, pass nitrogen to drive oxygen, control the alkalization temperature at 35~40°C, continue to pass nitrogen until the alkalization reaction is completed, after the alkalization reaction for 60 minutes, put in 1.80 parts by weight of 60~80 % (wt.) chloroacetic acid solution, continue the first-stage etherification reaction under nitrogen fi...

Embodiment 2

[0039] The preparation of the thickener, that is, the fracturing fluid high-viscosity glue HLG: 1.35 parts by weight of sodium hydroxide solution with a mass concentration of 50% was prepared in advance, and then 0.1 parts by weight of N-methylolacrylamide, 0.01 parts by weight of anthranilic acid, 0.01 parts by weight of urea, 0.001 parts by weight of Span-40 and 1.75 parts by weight of 92% ethanol (wt.) were mixed uniformly in the above sodium hydroxide solution, exothermic during the mixing process, the system was cooled to below 15°C, and pumped to kneading Put 1 part by weight of refined cotton with a degree of polymerization of 3400 into the kneader. After the feeding is completed, close the feeding port of the kneader, pass nitrogen to drive oxygen, control the alkalization temperature at 25°C, and continue to pass nitrogen until the end of the alkalization reaction. After 55 minutes, put in 1.18 parts of 70% (wt.) chloroacetic acid solution, continue the first-stage eth...

Embodiment 3

[0045] Thickener is the preparation of fracturing fluid high-viscosity glue HLG: thickener is the preparation of fracturing fluid high-viscosity glue: prepare 1.50 parts by weight of sodium hydroxide solution with a mass concentration of 50% in advance, and then add 0.02 parts by weight of sodium tetraborate , 0.01 parts by weight of sodium sulfite, 0.03 parts by weight of urea and 1.90 parts by weight of 93% ethanol (wt.) were mixed uniformly in the above sodium hydroxide solution, exothermic during the mixing process, the system was cooled to below 15°C, and pumped into the kneader , put in 1 weight part of refined cotton with a polymerization degree of 3300. After the feeding is completed, close the feeding port of the kneader, pass nitrogen to drive oxygen, control the alkalization temperature at 20°C, and continue to pass nitrogen until the end of the alkalization reaction. After 80 minutes of the alkalization reaction , put in 1.08 parts by weight of 65% (wt.) chloroaceti...

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PUM

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Abstract

The invention discloses a method for manufacturing fracturing fluid, and belongs to the technical field of chemicals for oil and gas production. The method is characterized in that refined cotton with a high polymerization degree is used as a cellulose raw material, and celluloses are alkalified and etherified and are subjected to micro-crosslinking to obtain a high-viscosity thickening material (semi-synthesis polymer gel) with high salt resistance; the high-viscosity thickening material is used as a thickener and a substitute for guar gum, and metal aluminum salt or titanium salt or zircon salt or a composite of the metal aluminum salt, the titanium salt and the zircon salt is used as a crosslinking agent to develop the all-clean aqueous fracturing fluid. The method has the advantages that shortcomings of the traditional guar gum fracturing fluid and a fracturing technology of the traditional guar gum fracturing fluid are overcome; the fracturing fluid is high in viscosity and salt resistance and excellent in high-temperature sand-carrying and sand-suspending performance; the fracturing fluid is free of residues after gel breaking, is low in damage to formations and is not easy to mildew, and potential damage to reservoir due to gel breakage dead space and accumulation of residual gel is reduced; the fracturing fluid can resist the high temperature of 150 DEG C.

Description

technical field [0001] A method for preparing fracturing fluid, which belongs to the technical field of chemicals used in oil and gas development, specifically designs a fracturing fluid production method used in the production of oil wells, natural gas wells or unconventional oil shale gas wells. fluid, fracturing fluid. Background technique [0002] Fracturing fluid is the key technology in fracturing construction, known as the "blood" of fracturing, fracturing technology is a conventional stimulation technology, and thickener is the key material in fracturing fluid. [0003] Guar gum is still the most used thickener at present. Guar gum belongs to vegetable gum. The product is divided into primary and secondary, and there are many water-insoluble substances. Even the chemically modified primary product hydroxypropyl guar Guar gum (HPG), its water-insoluble content is still above 8%, and the residue after breaking the gel is about 500mg / L, and the guar gum is easy to mild...

Claims

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Application Information

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IPC IPC(8): C09K8/68C08B31/12
CPCC09K8/685C08B31/12C09K8/665C09K8/90C09K2208/26
Inventor 胡志孟徐建牛保伟
Owner 山东金晓阳生物科技有限公司
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