Viscosity reducing composition and method for reducing viscosity of viscous oil

A composition and viscosity reduction technology, which can be used in drilling compositions, chemical instruments and methods, and earth-moving drilling and mining, etc., and can solve problems such as limited scope of use

Active Publication Date: 2014-11-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microorganisms are very sensitive to reservoir temperature and salinity, so the method has limited applicability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This example is used to illustrate the viscosity-reducing composition and the method for reducing the viscosity of heavy oil of the present invention.

[0049] (1) Preparation of viscosity-reducing composition: Add 0.05g of ethylene-vinyl acetate copolymer (Mitsui, EVA220, VA content 28% by weight, melt index 150g / 10min) to 40g of Zhongyuanwen Yilian thin oil (50°C When the viscosity is 10.6mPa·s, the same below), stir at 50°C for 30 minutes to dissolve. Then 1.5 g of 4-nonylphenol (Beijing Sinopharm Reagent Group, chemically pure) and 0.1 g of 4-dodecylbenzenesulfonic acid (Beijing Sinopharm Reagent Group, chemically pure) were added to obtain viscosity reducing composition A1.

[0050] (2) Thick oil viscosity reduction: add 40g of viscosity reducing composition A1 to 20g of Zhongyuan heavy oil solid (viscosity at 130°C is 1.66×10 4 mPa·s, the same below). Stir and dissolve at 100° C. for 4 hours to obtain a mixed oil.

[0051] Measure the dynamic viscosity of the m...

Embodiment 2

[0053] This example is used to illustrate the viscosity-reducing composition and the method for reducing the viscosity of heavy oil of the present invention.

[0054] (1) Preparation of viscosity-reducing composition: add 0.05 g of surfactant TX-10 (purchased from Haian Petrochemical Plant) to 30 g of Zhongyuan Huxianglian thin oil (viscosity at 50°C is 6.0 mPa·s, the same below) , stirred at 25 °C for 5 min to dissolve. Then 0.6 g of 4-dodecylphenol (Beijing Sinopharm Reagent Group, chemically pure) and 0.1 g of 4-dodecylbenzenesulfonic acid (Beijing Sinopharm Reagent Group, chemically pure) were added to obtain the viscosity-reducing composition A2.

[0055] (2) Thick oil viscosity reduction: Add 30 g of viscosity reducing composition A2 to 30 g of Inner Mongolia heavy oil solid (viscosity at 50°C is 1.71×10 4 mPa·s, the same below). Stir and dissolve at 100° C. for 4 hours to obtain a mixed oil.

[0056] Measure the dynamic viscosity of the mixed oil at 50°C. The mixed ...

Embodiment 3

[0058] This example is used to illustrate the viscosity-reducing composition and the method for reducing the viscosity of heavy oil of the present invention.

[0059] (1) Preparation of viscosity reducing composition: the polycondensate of chlorinated paraffin-naphthalene (based on the total amount of polycondensate, the molar content of chlorinated paraffin in the polycondensate is 66mol%, and the polycondensate of chlorinated paraffin-naphthalene The weight-average molecular weight is 6000, purchased from Exxon Company (Paraflow brand) 0.01g, added to 40g of Zhongyuanwen Yilian thin oil, stirred at 50°C for 30 hours to dissolve. Add 0.6 g of 4-dodecylphenol (Beijing Sinopharm Reagent Group, chemically pure) and 0.05 g of heavy alkylbenzenesulfonic acid (Nanjing Jintong Petrochemical Plant) to obtain viscosity-reducing composition A3.

[0060] (2) Thick oil viscosity reduction: add 40 g of viscosity reducing composition A3 to 20 g of Zhongyuan heavy oil solids, stir and disso...

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Abstract

The invention discloses a viscosity reducing composition, which comprises (a) phenolic compounds and (b) thin oil; wherein the phenolic compounds can be alkyl phenol and / or alkyl naphthol, the alkyl chain comprises 6 to 16 carbon atoms, and the weight ratio of the phenolic compound to the thin oil is 1:1-300. The invention further provides a method for reducing the viscosity of viscous oil, and comprises a step of contacting the provided viscosity reducing composition with viscous oil. The provided method can effectively reduce the dynamic viscosity of viscous oil.

Description

technical field [0001] The invention relates to a viscosity-reducing composition and a method for reducing the viscosity of heavy oil. Background technique [0002] The key to the current heavy oil development technology is to reduce the viscosity of heavy oil underground and increase its fluidity. [0003] For some special types of heavy oil reservoirs discovered in the exploration and development of heavy oil reservoirs in recent years, it is difficult to achieve good heavy oil recovery effects when using existing thermal oil recovery or other conventional oil recovery methods, such as conventional chemical flooding methods. [0004] It has been disclosed that a solvent such as propane or butane is injected into the formation, and the light components in the heavy oil are extracted to realize the recovery of the heavy oil by virtue of the extraction effect of the solvent. However, this method will lead to a reduction in the seepage capacity of the reservoir and a reductio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/58E21B43/22
CPCC09K8/58
Inventor 江建林
Owner CHINA PETROLEUM & CHEM CORP
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