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Ultra-high temperature aggravated fracturing fluid and its preparation

A fracturing fluid and ultra-high temperature technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve problems such as poor temperature resistance, high residue content, and poor shear resistance

Active Publication Date: 2017-02-22
北京国海能源技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current common aggravated fracturing fluid has the disadvantages of high residue content, poor temperature resistance and poor shear resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] An ultra-high temperature weighted fracturing fluid, the fracturing fluid comprises the following raw materials prepared in parts by weight: 500 parts of water, 12 parts of temperature-resistant thickener, 15 parts of high-temperature crosslinking agent, 125 parts of inorganic weighting agent, auxiliary 20 parts of discharge agent, 8 parts of bactericide, 5 parts of temperature stabilizer and 0.1 part of gel breaker; the temperature-resistant thickener is carboxymethyl hydroxypropyl guar gum, and the high-temperature crosslinking agent is organic zirconium crosslinking agent agent, and the inorganic weighting agent is sodium chloride; the drainage aid includes the following raw materials prepared in parts by weight: 3 parts of dodecyl dimethyl betaine, 2,3-epoxypropyl trimethyl 8 parts of ammonium chloride and 10 parts of water; the bactericide comprises the following raw materials formulated in parts by weight: 3 parts of glutaraldehyde and 8 parts of dodecyltrimethylam...

Embodiment 2

[0072] An ultra-high temperature weighted fracturing fluid, the fracturing fluid comprises the following raw materials prepared in parts by weight: 500 parts of water, 13.5 parts of temperature-resistant thickener, 22.5 parts of high-temperature crosslinking agent, 160 parts of inorganic weighting agent, auxiliary 25 parts of discharge agent, 11.5 parts of bactericide, 7.5 parts of temperature stabilizer and 0.2 part of gel breaker; agent, and the inorganic weighting agent is sodium bromide; the drainage aid comprises the following raw materials prepared in parts by weight: 3 parts of dodecyl dimethyl betaine, 2,3-epoxypropyl trimethyl 8 parts of ammonium chloride and 10 parts of water; the bactericide comprises the following raw materials formulated in parts by weight: 3 parts of glutaraldehyde and 8 parts of dodecyltrimethylammonium chloride; the temperature stabilizer The following raw materials are formulated in parts by weight: 3 parts of zirconium oxychloride, 10 parts o...

Embodiment 3

[0085]An ultra-high temperature weighted fracturing fluid, the fracturing fluid comprises the following raw materials prepared in parts by weight: 500 parts of water, 15 parts of temperature-resistant thickener, 30 parts of high-temperature crosslinking agent, 195 parts of inorganic weighting agent, auxiliary 30 parts of discharge agent, 15 parts of bactericide, 10 parts of temperature stabilizer and 0.3 part of gel breaker; the temperature-resistant thickening agent is carboxymethyl hydroxypropyl guar gum, and the high-temperature crosslinking agent is organic zirconium crosslinking agent agent, and the inorganic weighting agent is sodium chloride; the drainage aid includes the following raw materials prepared in parts by weight: 3 parts of dodecyl dimethyl betaine, 2,3-epoxypropyl trimethyl 8 parts of ammonium chloride and 10 parts of water; the bactericide comprises the following raw materials formulated in parts by weight: 3 parts of glutaraldehyde and 8 parts of dodecyltri...

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Abstract

The invention belongs to a superhigh temperature weighted fracturing fluid and preparation thereof. The liquid is prepared from the following raw materials in parts by weight: 500 parts of water, 12-15 parts of a temperature-resistant thickener, 15-30 parts of a high-temperature crosslinking agent, 125-195 parts of an inorganic weighting agent, 20-30 parts of a discharge aiding agent, 8-15 parts of a bactericide, 5-10 parts of a temperature stabilizer and 0.1-0.3 part of a gel breaker, wherein the temperature-resistant thickener is carboxymethyl and hydroxypropyl guanidine glue, the high-temperature crosslinking agent is an organic zirconium crosslinking agent, and the inorganic weighing agent is any one of sodium chloride or sodium bromide. The superhigh temperature weighted fracturing fluid has the advantages of low content of residues and good temperature resistance and shear resistance.

Description

technical field [0001] The invention belongs to the technical field of oil field chemistry, and in particular relates to an ultra-high-temperature weighted fracturing fluid suitable for fracturing reconstruction of oil-gas reservoirs in deep or abnormally high-temperature oil reservoirs and its preparation. Background technique [0002] With the continuous deepening of exploration and development, the number of ultra-deep wells, high-pressure wells and abnormal geostress wells has gradually increased. However, the operating pressure of such wells is high, usually above 90MPa. Based on the above facts, more stringent requirements are put forward for fracturing equipment. However, the maximum bearing pressure of the current fracturing crew is only 103.4MPa. Forced fracturing not only affects the safety of construction but also reduces the success rate of construction. Increase the pressure of the fluid column by adding salt to the fracturing fluid, thereby reducing the wellhea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68
CPCC09K8/605C09K8/665C09K8/685C09K8/706C09K8/882C09K8/887C09K8/90C09K2208/26
Inventor 张春雨姚佩锋
Owner 北京国海能源技术研究院
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