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An environmentally friendly anionic fracturing fluid and preparation method thereof

A fracturing fluid and anion technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of high cost, complex formula, poor field implementation, etc., and achieve short configuration cycle, good water solubility, Configuring Simple Effects

Active Publication Date: 2016-02-03
BEIJING RECHSAND SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the formula of this technical solution is complicated, the cost is high and the on-site implementation is not good

Method used

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  • An environmentally friendly anionic fracturing fluid and preparation method thereof
  • An environmentally friendly anionic fracturing fluid and preparation method thereof
  • An environmentally friendly anionic fracturing fluid and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The water-based fracturing fluid described in this embodiment includes the following components: 0.06g of diethylenetriaminepentamethylenephosphonic acid, 18g of sodium oleate, 12.9g of sodium phosphate, an appropriate amount of sodium hydroxide, and 200g of water.

[0033] The preparation method of the water-based fracturing fluid described in this embodiment is as follows:

[0034] (1) Add 0.06g of diethylenetriaminepentamethylenephosphonic acid to 200g of tap water;

[0035] (2) Dissolve the above-mentioned specific amount of sodium phosphate in 200 g of water treated with diethylenetriaminepentamethylenephosphonic acid, stir and mix evenly at a medium speed to obtain a sodium phosphate solution;

[0036] (3) Measure the pH value with a pH meter, and add sodium hydroxide to adjust the pH value of the sodium phosphate solution obtained in step (2) to 9 according to the pH value;

[0037] (4) Add the above-mentioned specific amount of sodium oleate to the alkaline sod...

Embodiment 2

[0042] The water-based fracturing fluid described in this example includes the following components: 0.06g of diethylenetriaminepentamethylenephosphonic acid, 20g of sodium oleate, 10.4g of sodium phosphate, 0.5g of n-hexanol, and an appropriate amount of sodium hydroxide , 200g of water.

[0043] The preparation method of the water-based fracturing fluid described in this embodiment is as follows:

[0044] (1) Add 0.06g of diethylenetriaminepentamethylenephosphonic acid to 200g of tap water;

[0045] (2) Dissolve the above-mentioned specific amount of sodium phosphate in 200g of water, stir and mix evenly at a medium speed to obtain a sodium phosphate solution;

[0046] (3) Measure the pH value with a pH meter, and add sodium hydroxide to adjust the pH value of the sodium phosphate solution obtained in step (2) to 10 according to the pH value;

[0047] (4) Add 0.5 g of n-hexanol to the solution obtained in (2);

[0048] (5) Add the above-mentioned specific amount of sodium...

Embodiment 3

[0053] The water-based fracturing fluid described in this example includes the following components: 0.06g of diethylenetriaminepentamethylenephosphonic acid, 18g of sodium oleate, 12.1g of sodium phosphate, an appropriate amount of sodium hydroxide, and 200g of water.

[0054] The preparation method of the water-based fracturing fluid described in this embodiment is as follows:

[0055] (1) Add 0.06g of diethylenetriaminepentamethylenephosphonic acid to 200g of tap water;

[0056] (2) Dissolve the above-mentioned specific amount of sodium phosphate in 200g of water, stir and mix evenly at a medium speed to obtain a sodium phosphate solution;

[0057] (3) Measure the pH value with a pH meter, and add sodium hydroxide to adjust the pH value of the sodium phosphate solution obtained in step (2) to 8 according to the pH value;

[0058] (4) Add the above-mentioned specific amount of sodium oleate to the alkaline sodium phosphate solution obtained in step (3), and stir at a medium...

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Abstract

The invention discloses environmental-friendly type negative ion fracturing fluid which is prepared by the following ingredients by weight percentage of 7% to 10% of anionic surfactant, 0.02% to 0.05% of methylene phosphonic acid, 4% to 7% of countra-ion salt, 0% to 0.4% of cosurfactant and the balance water. The pH value of the ion fracturing fluid is adjusted to 8 to 10 by a pH conditioning agent. The environmental-friendly type negative ion fracturing fluid is all prepared by micromolecule, good in water solubility, simple to prepare, capable of removing aging, short in preparation period, capable of achieving complete gel breaking with water or oil, quick in gel breaking, free of residue, free of affecting in-place permeability and capable of greatly improving fracturing reforestation effects. The used anionic surfactant avoids wetting transition and has no harm to stratums.

Description

technical field [0001] The invention relates to the field of fracturing reconstruction of oil and gas wells, in particular to anion-cleaning fracturing fluid. Background technique [0002] At present, all water-based fracturing fluids have residues without exception. These residues will inevitably cause serious blockage to the formation and filling layers and greatly reduce the permeability (the cumulative damage can reach more than 90%), thereby greatly reducing the hydraulic pressure. The effect of fracturing (especially for low-pressure, low-permeability oil and gas reservoirs, often resulting in complete failure of fracturing). [0003] Therefore, under the current situation that oil and gas field development has higher and higher fracturing effects, eliminating residues and their damage has become a major technical problem that needs to be solved urgently. It is also a frontier topic in this industry - clean fracturing fluid (VES) and its application. [0004] Most of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68
Inventor 秦升益李昭勋王中学胡宝苓许志超
Owner BEIJING RECHSAND SCI & TECH GRP
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