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Fracturing fluid cross-linking agent and preparation method thereof

A technology of cross-linking agent and fracturing fluid, which is applied in chemical instruments and methods, organic chemistry, drilling composition, etc. Effect

Pending Publication Date: 2022-07-29
DONGYING SPRING PETROLEUM ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The applicable temperature of the cross-linking agent is 80-120°C. Although it has met the needs of most reservoirs, with the further development of reservoirs in recent years, the depth of oil wells has continued to increase, and the temperature of many reservoirs has reached above 130°C. Therefore, the application is limited

Method used

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  • Fracturing fluid cross-linking agent and preparation method thereof
  • Fracturing fluid cross-linking agent and preparation method thereof
  • Fracturing fluid cross-linking agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) 4mol propanol was added to the reactor, 1mol zirconium tetrachloride was slowly added, ammonia gas was introduced from the bottom of the reaction solution while stirring, the pH was adjusted to 5, the stirring speed was 300rpm, and the reaction was performed for 0.5h to obtain an intermediate product titanium Tetrapropyl acid.

[0030] (2) in above-mentioned reactor, add 2mol isopropanolamine and 699g industrial alcohol, continue to stir, stirring speed is 200rpm, react 1.2h, obtain crosslinking agent C 1 .

Embodiment 2

[0032] (1) add 4.6mol propanol in the reactor, slowly add 1mol zirconium tetrachloride, feed ammonia gas from the bottom of the reaction solution while stirring, adjust the pH to 6, the stirring speed is 350rpm, and react for 1h to obtain the intermediate product titanium Tetrapropyl acid.

[0033] (2) in above-mentioned reactor, add 2.3mol isopropanolamine and 600g industrial alcohol, continue to stir, stirring speed is 400rpm, react 1.5h, obtain crosslinking agent C 2 .

Embodiment 3

[0035] (1) add 5mol propanol in the reactor, slowly add 1mol zirconium tetrachloride, feed ammonia gas from the bottom of the reaction solution while stirring, adjust the pH to 7, the stirring speed is 400rpm, react for 2h, and obtain the intermediate product titanic acid Tetrapropyl ester.

[0036] (2) in above-mentioned reactor, add 2.5mol isopropanolamine and 520g industrial alcohol, continue stirring, stirring speed is 600rpm, react 1.8h, obtain crosslinking agent C 3 .

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Abstract

The invention belongs to the technical field of tertiary oil recovery, and particularly relates to a fracturing fluid cross-linking agent and a preparation method thereof. The synthetic method of the fracturing fluid cross-linking agent comprises the following specific steps: adding propyl alcohol into a reactor, slowly adding zirconium tetrachloride, introducing ammonia gas from the bottom of reaction liquid while stirring, adjusting the pH value, and reacting for 0.5-2 hours; and adding isopropanolamine and industrial alcohol into the reactor, and continuously stirring for 1-2 hours to obtain the cross-linking agent. The cross-linking agent is wide in raw material source and low in price; the cross-linking agent has the characteristics of simple synthesis process, low dosage, high adaptability and the like; meanwhile, the fracturing fluid cross-linked by the cross-linking agent has high viscosity, temperature resistance, shear resistance and acid resistance, the viscosity of the fracturing fluid cross-linked can reach 600mPa. S, the temperature resistance can reach 145 DEG C, the shear resistance time is longer than 150min, and the acid-resistant pH value is 1.5.

Description

technical field [0001] The invention belongs to the technical field of tertiary oil recovery, and particularly relates to a fracturing fluid crosslinking agent and a preparation method thereof. Background technique [0002] In the process of oil and gas field exploitation, years of construction experience have shown that hydraulic fracturing technology is the most efficient stimulation technology to improve the development effect of low-permeability oil and gas reservoirs. The increasingly important role has become the preferred stimulation technology for deep oil and gas reservoir development, and has received more and more attention. [0003] The currently widely used guar gum fracturing fluid has problems such as excessive water dissolving time, "fish eye" and severe local agglomeration, poor shear resistance under high temperature conditions, and large residue after the fracturing fluid breaks the gel. The development of guar gum fracturing fluid. Boron cross-linking a...

Claims

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Application Information

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IPC IPC(8): C09K8/68C09K8/86C07F7/00
CPCC09K8/685C09K8/86C07F7/00
Inventor 孙春同任海宁孙永强任平平齐海花
Owner DONGYING SPRING PETROLEUM ENG TECH
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