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Ultra-temperature organic zirconium crosslinker suitable for polymer crosslinking and prepared fracturing solutions of ultra-temperature organic zirconium crosslinker

A technology of zirconium cross-linking agent and polymer, which is applied in the field of oil exploitation, can solve the problems of large formation damage and high residue content of gel-breaking fluid, and achieve the effects of low damage, good sand-carrying performance and elasticity, and low residue

Active Publication Date: 2012-12-26
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing technology shows that the use of organoboron cross-linking agents can be applied to formations at a maximum of 150 °C, while the use of organic zirconium and organic titanium guar jelly fracturing fluids can withstand temperatures up to 180 °C, but the fracturing fluid gel-breaker residue content High, great damage to the ground

Method used

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  • Ultra-temperature organic zirconium crosslinker suitable for polymer crosslinking and prepared fracturing solutions of ultra-temperature organic zirconium crosslinker
  • Ultra-temperature organic zirconium crosslinker suitable for polymer crosslinking and prepared fracturing solutions of ultra-temperature organic zirconium crosslinker
  • Ultra-temperature organic zirconium crosslinker suitable for polymer crosslinking and prepared fracturing solutions of ultra-temperature organic zirconium crosslinker

Examples

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Embodiment 1

[0030] This example provides an ultra-high temperature organic zirconium crosslinking agent suitable for polymer crosslinking and a fracturing fluid prepared therefrom.

[0031] The organic zirconium crosslinking agent provided in this example comprises the following raw materials: 300 g of water, 200 g of ethylene glycol, 70 g of zirconium oxychloride, 20 g of lactic acid, and 320 g of diethanolamine.

[0032] The organic zirconium crosslinking agent provided in this embodiment is prepared according to the following steps:

[0033] Add ethylene glycol into water at room temperature, stir and mix evenly with a stirrer, then heat up to 50°C;

[0034] Zirconium oxychloride was added under stirring conditions, and then reacted under stirring at 50°C for 3.5 hours;

[0035] Then add lactic acid and diethanolamine, and react under stirring at 50°C for 3 hours to prepare the ultra-high temperature organic zirconium crosslinking agent suitable for polymer crosslinking.

[0036] Thi...

Embodiment 2

[0043] This example provides an ultra-high temperature organic zirconium crosslinking agent suitable for polymer crosslinking and a fracturing fluid prepared therefrom.

[0044] The organic zirconium crosslinking agent provided in this example comprises the following raw materials: 300 g of water, 240 g of glycerol, 60 g of zirconium chloride, 30 g of lactic acid, and 300 g of isopropanolamine.

[0045] The organic zirconium crosslinking agent provided in this embodiment is prepared according to the following steps:

[0046] Add glycerol to water at room temperature, stir and mix evenly with a stirrer, then heat up to 55°C;

[0047] Zirconium chloride was added under stirring conditions, and then reacted under stirring at 55°C for 3.5 hours;

[0048] Then add lactic acid and isopropanolamine, react at 55° C. for 3 hours under stirring, and prepare the ultra-high temperature organic zirconium crosslinking agent suitable for polymer crosslinking.

[0049] This embodiment also ...

Embodiment 3

[0057] This example provides an ultra-high temperature organic zirconium crosslinking agent suitable for polymer crosslinking and a fracturing fluid prepared therefrom.

[0058] The organic zirconium crosslinking agent provided in this example comprises the following raw materials: 300 g of water, 260 g of n-butanol, 90 g of zirconium chloride, 20 g of acetic acid, and 320 g of triethanolamine.

[0059] The organic zirconium crosslinking agent provided in this embodiment is prepared according to the following steps:

[0060] Add n-butanol to water at room temperature, stir and mix evenly with a stirrer, then heat up to 60°C; add zirconium chloride under stirring conditions, and then react at 60°C for 4 hours; then add acetic acid and triethanolamine, at 60°C ℃ for 3 hours under stirring to prepare the ultra-high temperature organic zirconium crosslinking agent suitable for polymer crosslinking.

[0061] This embodiment also provides a polymer fracturing fluid, which includes ...

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Abstract

The invention relates to an ultra-temperature organic zirconium crosslinker suitable for polymer crosslinking and prepared fracturing solutions of the ultra-temperature organic zirconium crosslinker. The organic zirconium crosslinker comprises the following raw materials in part by mass: 200 to 350 parts of water, 170 to 280 parts of organic alcohol, 40 to 100 parts of zirconium compounds, 20 to 50 parts of organic acid and 300 to 350 parts of alkanolamine. The preparation method of the organic zirconium crosslinker comprises the steps as follows: adding the organic alcohol into the water; heating the solution to 50 to 60 DEG C after uniformly mixing the organic alcohol and the water; adding the zirconium compounds into the solution for reacting for 3 to 4 hours; then adding the organic acid and the alkanolamine; and stirring at the temperature of 50 to 60 DEG C for 2 to 3 hours so as to prepare the organic zirconium crosslinker. The invention further relates to polymer fracturing solutions and a preparation method thereof, and the organic zirconium crosslinker and PAM aqueous solutions are adopted to prepare the ultra-temperature resistant fracturing solutions which can resist the temperature over 200 DEG C; and the fracturing solutions further have the characteristics of acid gluing, low damage, no residue and the like.

Description

technical field [0001] The invention relates to a cross-linking agent and a preparation method thereof, in particular to an organic zirconium cross-linking agent and a preparation method thereof, and polymer fracturing fluid prepared therefrom, belonging to the technical field of petroleum exploitation. Background technique [0002] With the deepening of exploration and development of oil and gas fields at home and abroad, reservoirs characterized by deep layers, high temperature, and low permeability have become the focus of oil and gas reservoir transformation. In recent years, Tarim Oilfield, Jidong Oilfield, Jilin Oilfield and other domestic oilfields have been There are ultra-high temperature reservoirs with temperatures above 180°C that need to be developed. Therefore, in order to effectively solve the technical problems of high-temperature deep well and low-permeability reservoir reconstruction, improving the temperature resistance of fracturing fluids will be the key ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K13/02C08K5/053C08K5/05C08K3/18C08K3/16C08K5/1575C08K5/09C08K5/17C09K8/68C08L33/26C08J3/24
Inventor 王丽伟程兴生卢拥军管保山邱晓惠翟文崔伟香刘萍梁利熊波
Owner PETROCHINA CO LTD
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