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Fracturing fluid and preparation method and application thereof

A fracturing fluid and solution technology, which is applied in the field of guar gum fracturing fluid, can solve the problems of high cost of fracturing fluid and damage to the reservoir due to the amount of usage, and achieve the effects of low price, strong temperature resistance, and reduced damage

Active Publication Date: 2021-07-09
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For now, guar gum fracturing fluid will still occupy a dominant position in the market for a long time, but the use of high concentration guar gum not only easily causes damage to the reservoir, but also leads to high unit cost of fracturing fluid no less

Method used

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  • Fracturing fluid and preparation method and application thereof
  • Fracturing fluid and preparation method and application thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0036] The present embodiment provides a kind of preparation method of fracturing fluid, it comprises:

[0037] Step 1, weigh borax, pseudoboehmite, ammonium chloride and water according to the mass ratio of 18.5:4.6:33:100, dissolve borax, pseudoboehmite and ammonium chloride in water, stir well and pour Put it into a high-pressure reactor and seal it; then place it in a muffle furnace at 580°C for 10 hours; then wash and dry the calcined product to obtain a crosslinking agent.

[0038] In step 2, the alkyl polyoxyethylene ether, isopropanol, alkyl polyglycoside and water are mixed in a mass ratio of 10:24:2:100 to obtain a drainage aid.

[0039] Step 3: Taking the total mass of the fracturing fluid as 100%, weigh 2‰ of carboxymethyl hydroxypropyl guar gum, 1.8‰ of the crosslinking agent prepared in Step 1, 2.5‰ of the drainage aid obtained in Step 2, and chlorinate Potassium 5‰, formaldehyde 0.35‰, polyoxyethylene polyoxypropylene pentaerythritol ether 0.35‰, sodium bicarbo...

Embodiment 2

[0044] The present embodiment provides a kind of preparation method of fracturing fluid, it comprises:

[0045] Step 1, weigh borax, pseudoboehmite, ammonium chloride and water according to the mass ratio of 20:5:30:100, dissolve borax, pseudoboehmite and ammonium chloride in water, stir well and pour Put it into a high-pressure reactor and seal it; then place it in a muffle furnace at 580°C for 10 hours; then wash and dry the calcined product to obtain a crosslinking agent.

[0046] In step 2, the alkyl polyoxyethylene ether, isopropanol, alkyl polyglycoside and water are mixed in a mass ratio of 13:29:2.4:100 to obtain a drainage aid.

[0047] Step 3: Taking the total mass of the fracturing fluid as 100%, weigh 2.5‰ of carboxymethyl hydroxypropyl guar gum, 2‰ of the cross-linking agent prepared in step 1, 2.1‰ of the drainage aid obtained in step 2, and chlorinate Ammonium 7‰, acrolein 0.25‰, polyoxyethylene polyoxypropylene alcohol amine ether 0.25‰, sodium bicarbonate 0.7...

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Abstract

The invention provides fracturing fluid and a preparation method and application thereof. The fracturing fluid is formed by mixing carboxymethyl hydroxypropyl guanidine gum, a cross-linking agent, a cleanup additive, a clay stabilizer, a bactericide, a defoaming agent, a pH value regulator, a temperature stabilizer and water, and the cross-linking agent comprises nano aluminum borate. The invention also provides application of the fracturing fluid in tight sandstone reservoir fracturing with the temperature not higher than 150 DEG C. The fracturing fluid provided by the invention has the advantages that the use amount of guanidine gum is extremely small, the fracturing cost is reduced, the damage to a reservoir is reduced, the fracturing fluid can resist high temperature when being applied to reservoir fracturing, the preparation process is simple, the raw materials are cheap and wide in source, and the fracturing fluid has a wide application prospect.

Description

technical field [0001] The invention relates to a guar gum fracturing fluid, in particular to a fracturing fluid and a preparation method and application thereof. Background technique [0002] As each oilfield enters the later stage of development, low-permeability, tight and other low-grade oil reservoirs gradually become the main body of oil field companies to replace production. These low-grade oil reservoirs can be effectively developed mainly by fracturing measures, but such reservoirs have extremely poor pore-permeability properties. Poor, the requirements for fracturing fluid are extremely high, and the performance of fracturing fluid directly determines the stimulation effect of the target well. For now, guar gum fracturing fluid will still occupy a dominant position in the market for a long time, but the use of high concentration guar gum not only easily causes damage to the reservoir, but also leads to high unit cost of fracturing fluid No more. Therefore, the lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
CPCC09K8/685C09K8/90C09K8/605
Inventor 郭琳曾双红李霞关伟周坤郑亮田浩李杨孙鹏
Owner PETROCHINA CO LTD
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