A kind of cross-linking accelerator for carbon hydrocarbon anhydrous fracturing fluid and carbon hydrocarbon anhydrous fracturing fluid

A technology of anhydrous fracturing fluid and crosslinking accelerator, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., to achieve the effects of improving gel breaking ability, improving viscosity and gelling performance, and improving shear resistance

Active Publication Date: 2020-09-18
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, domestic research and application of low-damage continuous fracturing fluid systems are still in their infancy.

Method used

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  • A kind of cross-linking accelerator for carbon hydrocarbon anhydrous fracturing fluid and carbon hydrocarbon anhydrous fracturing fluid
  • A kind of cross-linking accelerator for carbon hydrocarbon anhydrous fracturing fluid and carbon hydrocarbon anhydrous fracturing fluid
  • A kind of cross-linking accelerator for carbon hydrocarbon anhydrous fracturing fluid and carbon hydrocarbon anhydrous fracturing fluid

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The cross-linking accelerator for hydrocarbon anhydrous fracturing in this embodiment contains 10 g of sodium hydroxide per 100 mL of cross-linking accelerator, 3 g of iron sulfate solution with a mass content of 20%, 45 mL of ethanol, 45 mL of ethylene glycol, and the balance It is water; mix the above substances evenly to obtain the cross-linking accelerator for hydrocarbon anhydrous fracturing fluid.

[0026] The carbon hydrocarbon anhydrous fracturing fluid prepared by the crosslinking accelerator of this embodiment includes a base fluid, a gelling agent and a crosslinking accelerator, the base fluid is diesel oil, and the volume of the gelling agent is 4% of the volume of diesel oil , the volume of the cross-linking accelerator is 2% of the volume of the diesel oil, and the gelling agent is an invention patent with the patent number ZL00100278.3 and the name "a phosphate aluminum oil-based fracturing fluid gelling agent and its preparation method" An oil-based frac...

Embodiment 2

[0028] The cross-linking accelerator for hydrocarbon anhydrous fracturing in this embodiment contains 10 g of sodium hydroxide in every 100 mL of cross-linking accelerator, 5 g of ferric sulfate solution with a mass content of 20%, 45 mL of ethanol, 45 mL of ethylene glycol, and the balance It is water; mix the above substances evenly to obtain the cross-linking accelerator for hydrocarbon anhydrous fracturing fluid.

[0029] The carbon hydrocarbon anhydrous fracturing fluid prepared by the crosslinking accelerator of this embodiment includes a base fluid, a gelling agent and a crosslinking accelerator, the base fluid is diesel oil, and the volume of the gelling agent is 4% of the volume of diesel oil , the volume of the cross-linking accelerator is 2% of the volume of the diesel oil, and the gelling agent is an invention patent with the patent number ZL00100278.3 and the name "a phosphate aluminum oil-based fracturing fluid gelling agent and its preparation method" An oil-bas...

Embodiment 3

[0031] The cross-linking accelerator for carbon hydrocarbon anhydrous fracturing of the present embodiment contains sodium hydroxide 10g in every 100mL cross-linking accelerator, and the mass content is 7.5g of ferric sulfate solution of 20%, 45mL ethanol, 45mL ethylene glycol, remaining The amount is water; mix the above substances evenly to obtain the cross-linking accelerator for hydrocarbon anhydrous fracturing fluid.

[0032] The carbon hydrocarbon anhydrous fracturing fluid prepared by the crosslinking accelerator of this embodiment includes a base fluid, a gelling agent and a crosslinking accelerator, the base fluid is diesel oil, and the volume of the gelling agent is 4% of the volume of diesel oil , the volume of the cross-linking accelerator is 2% of the volume of the diesel oil, and the gelling agent is an invention patent with the patent number ZL00100278.3 and the name "a phosphate aluminum oil-based fracturing fluid gelling agent and its preparation method" An oi...

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Abstract

The invention discloses a crosslinking accelerant for anhydrous hydrocarbon fracturing fluid. Each 100 mL of the crosslinking accelerant contains 3-10 g of alkali metal hydroxides, and 0.6-1.5 g of iron sulfate, 50-90 mL of organic alcohols. The organic alcohols refer to one or any of ethyl alcohol, ethylene glycol and propylene glycol. In addition, the invention also provides anhydrous hydrocarbon fracturing fluid prepared with the crosslinking accelerant; the anhydrous hydrocarbon fracturing fluid comprises a base liquid, a gelling agent and the crosslinking accelerant; the anhydrous hydrocarbon fracturing fluid is subjected to gel breaking after gelling, a gelling accelerant and a gelling agent are added to form a fracturing fluid for secondary use. The crosslinking accelerant herein can effectively improve viscosity and gelling performance of fracturing fluids, and temperature resistance, shear resistance and gel breaking capacity are improved for fracturing fluids; after the fracturing fluids are subjected to gel breaking, the fracturing fluids are suitable for secondary use; the fracturing fluids have good temperature resistance and are good for the development and application of unconventional reservoirs.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemistry and fracturing stimulation, and in particular relates to a cross-linking accelerator for anhydrous hydrocarbon fracturing fluid and anhydrous hydrocarbon fracturing fluid. Background technique [0002] At present, the demand for oil and gas is increasing day by day, while the production of conventional oil and gas is declining. Therefore, unconventional oil and gas resources such as tight sandstone gas, coalbed methane and shale gas have attracted great attention from all over the world. my country is very rich in unconventional oil and gas resources, and unconventional oil and gas reservoirs are characterized by low porosity, low permeability, poor reservoir physical properties, and usually show strong water sensitivity, while using conventional water-based fracturing fluids is very easy to It will cause water lock to the reservoir, reduce the permeability of the reservoir, and cause da...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/62C09K8/64
CPCC09K8/62C09K8/64
Inventor 王满学
Owner XI'AN PETROLEUM UNIVERSITY
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