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Nano material-based water-based oil field injection agent and preparation method thereof

A technology of nanomaterials and injection enhancers, applied in chemical instruments and methods, drilling compositions, etc., can solve the problem of high cost, and achieve significant effects of increasing production capacity, reducing water injection pressure, and

Inactive Publication Date: 2010-06-16
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oil-soluble solvents such as diesel oil are often used as the dispersion medium of nanomaterial carriers, and the effect of reducing pressure and increasing injection is recognized, but the cost is high

Method used

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  • Nano material-based water-based oil field injection agent and preparation method thereof
  • Nano material-based water-based oil field injection agent and preparation method thereof
  • Nano material-based water-based oil field injection agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of nanometer water-based injection booster stock solution: Weigh 40wt% of the total amount of diesel oil, add 2wt% of γ-(methacryloyloxy)propyl trimethoxysilane modified nano-silica, the average particle size About 20nm, activation degree ≥ 99%, emulsification machine 7000rpm emulsification dispersion 2min, then add other surfactants and additives, OP-10 accounted for 15wt%, Span80 accounted for 25wt%, sodium dodecylsulfonate accounted for 10wt%, Ethanol accounted for 8wt%, water bath at 40°C, and mechanically stirred for 10 minutes to obtain the original solution of nanometer water-based injection enhancer.

[0021] Preparation of nanometer water-based dispersion: measure 1L of tap water, add 10wt%, 15wt%, 20wt% of the above-mentioned injection booster stock solution, stir and mix evenly, and obtain nanometer water-based dispersion.

[0022] The TEM photomicrograph of nano-silica modified by γ-(methacryloyloxy)propyltrimethoxysilane is as follows: figure 1...

Embodiment 2

[0024] Preparation of nano-water-based injection booster stock solution: Weigh 40wt% of the total amount of diesel oil, add 2wt% oleic acid-modified nano-silica, the average particle size is about 30nm, the activation degree is ≥99.5%, and the emulsifier is 7000rpm Emulsify and disperse for 2 minutes, then add other surfactants and additives, sodium petroleum sulfonate accounted for 15wt%, oleic acid accounted for 20wt%, cetyltrimethylammonium chloride accounted for 10wt%, ethanol accounted for 13wt%, water bath 60 ℃ , and mechanically stirred for 10 minutes to obtain the original solution of nanometer water-based injection enhancer.

[0025] The preparation of the nano water-based dispersion is the same as in Example 1.

[0026] TEM photomicrograph of oleic acid modified nano-silica as figure 2 shown.

Embodiment 3

[0028] Preparation of nano-water-based injection booster stock solution: Weigh 35wt% of the total diesel oil, add 2wt% simethicone modified nano-silica, the average particle size is about 50nm, the activation degree is ≥ 98%, emulsified Machine 4000rpm emulsification dispersion 5min, then add other surfactants and additives, sodium dodecylbenzenesulfonate accounted for 15wt%, oleic acid accounted for 15wt%, NP-10 accounted for 13wt%, ethylene glycol accounted for 20wt%, at room temperature Stir mechanically for 20 minutes to obtain the original solution of nanometer water-based injection enhancer.

[0029] The preparation of the nano water-based dispersion is the same as in Example 1.

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Abstract

The invention relates to a nano material-based water-based oil field injection agent and a preparation method thereof. The injection agent consists of 20 to 60 weight percent of diesel oil, 30 to 70 weight percent of surfactant, 1 to 10 weight percent of nano material and 1 to 20 weight percent of auxiliary agent, wherein the nano material is one or more of nano silicon dioxide, nano titanium oxide, nano magnesium oxide and nano aluminum oxide after surface modification. The preparation method thereof comprises the following steps that: firstly, weighing the diesel oil in proportion; secondly, adding the nano material in the diesel oil; thirdly, emulsifying and dispersing the mixture in an emulsifying machine; fourthly, adding the surfactant and the auxiliary agent into the emulsified and dispersed mixture; and finally, mechanically stirring to disperse the mixture at room temperature or in a water bath to obtain stock solution of the nano water-based injection agent. The injection agent can be mixed with water at any proportion to obtain homogeneous emulsified dispersion. After the emulsified dispersion is injected in the oil field through a specific process, the water injection pressure can be obviously reduced, the amount of water injection can be increased and the oil production efficiency can be improved so as to achieve the purpose of energy conservation and injection increase.

Description

technical field [0001] The invention relates to the technical field of oilfield exploitation, in particular to a nanomaterial-based water-based oilfield booster injection agent suitable for secondary and tertiary oil recovery in low-permeability oilfields and a preparation method thereof. Background technique [0002] Using nanotechnology to improve the resistance characteristics of formation pores can achieve the purpose of reducing water injection pressure and increasing water injection volume. This is a new technology that is still in the stage of mechanism exploration, and is mainly suitable for low-permeability oilfields. Secondary and tertiary mining. In 2000, Sinopec introduced nano-silica enhanced injection technology from Russia, conducted field tests and applications in 12 wells in Shengli Oilfield and Zhongyuan Oilfield, and achieved success. According to the statistics of the test results, the maximum pressure drop reaches 9MPa, and the daily water injection vol...

Claims

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Application Information

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IPC IPC(8): C09K8/58
Inventor 施利毅张剑平曹绍梅狄勤丰顾春元刘善善
Owner SHANGHAI UNIV
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