Low-tension viscosity-reducing thick oil washing agent for cold production of common thick oil as well as preparation method and application thereof

A sticky oil cleaning agent, low tension technology, applied in chemical instruments and methods, production fluids, earthwork drilling and other directions, can solve the problem of not mentioning oil cleaning efficiency, etc., to improve oil displacement efficiency, emulsification and viscosity reduction ability. , the effect of improving the recovery rate

Inactive Publication Date: 2021-01-05
SHANDONG XINGANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the viscosity-reducing oil displacement agent in the above-mentioned technology mentions the viscosity-reducing and emulsifying effect on heavy oil, it does not mention the oil washing efficiency. Low tension heavy oil viscosity reducing detergent

Method used

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  • Low-tension viscosity-reducing thick oil washing agent for cold production of common thick oil as well as preparation method and application thereof
  • Low-tension viscosity-reducing thick oil washing agent for cold production of common thick oil as well as preparation method and application thereof
  • Low-tension viscosity-reducing thick oil washing agent for cold production of common thick oil as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Add 350kg of water into the reaction kettle, control the temperature at 60°C, add 50kg of anhydrous sodium carbonate, stir and dissolve evenly, add 300kg of isomeric tridecanol polyoxyethylene ether sulfonate (n=3) and 100kg of methanol, and stir Evenly, finally add 200kg phenol ether carboxylate (R 1 =8, m=7), and stir evenly to obtain a low-tension heavy oil viscosity-reducing detergent.

Embodiment 2

[0056] Add 340kg of water into the reaction kettle, control the temperature at 58°C, add 60kg of anhydrous sodium carbonate, stir and dissolve evenly, then add 320kg of isomeric tridecanol polyoxyethylene ether sulfonate (n=4) and 100kg of ethanol, Stir evenly, finally add 180kg phenol ether carboxylate (R 1 =9, m=8), and stir evenly to obtain a low-tension heavy oil viscosity-reducing detergent.

Embodiment 3

[0058] Add 330kg of water into the reaction kettle, control the temperature at 56°C, add 70kg of anhydrous sodium carbonate, stir and dissolve evenly, then add 340kg of isotridecyl alcohol polyoxyethylene ether sulfonate (n=3) and 100kg of isopropyl Alcohol, stir evenly, finally add 160kg phenol ether carboxylate (R 1 =10, m=9), and stir evenly to obtain a low-tension heavy oil viscosity-reducing detergent.

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Abstract

The invention provides a low-tension viscosity-reducing heavy oil washing agent for cold production of a common heavy oil reservoir as well as a preparation method and application thereof, belonging to the field of oilfield chemistry. The low-tension viscosity-reducing thick oil washing agent comprises the following components in percentage by mass: 30%-40% of alcohol ether sulfonate, 10%-20% of phenolic ether carboxylate, 5%-10% of sodium carbonate and 10% of low-carbon alcohol, with the balance being water. When the low-tension viscosity-reducing heavy oil washing agent is applied to a common heavy oil reservoir with a formation water mineralization degree of 0-100,000 mg/L and a calcium and magnesium ion concentration of less than or equal to 2,000 mg/L, the low-tension viscosity-reducing heavy oil washing agent has the characteristics that oil washing efficiency is more than or equal to 81.5%, a viscosity reduction rate is more than or equal to 98.3%, oil-water interfacial tensionis less than or equal to 3.3*10<-3> mN/m and the like. The preparation method is simple in process, low in cost and friendly to environment.

Description

technical field [0001] The invention belongs to the field of oil field chemistry, and in particular relates to a low-tension heavy oil viscosity-reducing oil washing agent for cold use of ordinary heavy oil reservoirs, a preparation method and application thereof. Background technique [0002] The cold recovery viscosity-reducing chemical flooding technology for ordinary heavy oil reservoirs is to inject the heavy oil viscosity-reducing detergent solution into the formation, use the oil washing function of the detergent to strip the crude oil on the formation sand, and reduce the viscosity of the crude oil, which is convenient for crude oil Migration in the formation, thereby enhancing oil recovery, is a kind of oil recovery technology with great development potential. [0003] Patent CN107365574A discloses a viscosity-reducing oil displacement agent, which can form an oil-in-water emulsion with heavy oil, effectively reduce the viscosity of heavy oil, and greatly reduce the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/58E21B43/22
CPCC09K8/584E21B43/16
Inventor 姜力华祝东明秦玉斌胡朋朋吴庆凯李金平丁锡刚李慎伟杨姗齐书磊
Owner SHANDONG XINGANG CHEM
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