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A method for catalytic viscosity reduction of ground heavy oil

A technology for catalyzing viscosity reduction and heavy oil, which can be used in earth-moving drilling, fluid production, wellbore/well components, etc., and can solve the problems of long reaction time and difficult implementation.

Active Publication Date: 2015-10-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using the above-mentioned catalysts or viscosity reducers to catalytically reduce the viscosity of heavy oil, it is necessary to add hydrogen, methane, etc., or to add hydrogen or oxygen donors, which is difficult to implement and takes a long time to react.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First add 1.08g of nickel sulfate catalyst into 2.16g of deionized water, then add the mixture and 108g of heavy oil (the dynamic viscosity after degassing and dehydration at 50°C is 3470mPa·s) into a 300mL reactor, and heat the reactants to 160°C, keep the reaction pressure at 6MPa, and stir for 200min. The measured kinetic viscosity of the reaction product oil after degassing and dehydration at 50° C. is 1232 mPa·s, and the viscosity reduction rate is 64.5%.

Embodiment 2

[0028] First add 0.01g of ferrous sulfate catalyst into 375g of deionized water, then add the mixture and 250g of heavy oil (the dynamic viscosity after degassing and dehydration at 50°C is 3470mPa·s) into a 1L reactor, and heat the reactants to 320°C, keep the reaction pressure at 0.4MPa, and stir for 30min. The measured kinetic viscosity of the reaction product oil after degassing and dehydration at 50° C. is 1271 mPa·s, and the viscosity reduction rate is 63.4%.

Embodiment 3

[0030] First 0.25g ferrous sulfate, 0.12g vanadyl sulfate and 0.13g molybdenum sulfate catalyst are added in 28.8g deionized water, then this mixture and 120.1g heavy oil (the dynamic viscosity after degassing and dehydrating at 50 ℃ is 3470mPa. s) Add it into a 300mL reactor, heat the reactant to 265°C, keep the reaction pressure at 4MPa, and stir for 100min. The measured kinetic viscosity of the reaction product oil after degassing and dehydration at 50° C. is 283 mPa·s, and the viscosity reduction rate is 91.8%.

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PUM

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Abstract

The invention discloses a catalytic viscosity reduction method for ground heavy oil. The catalytic viscosity reduction method for the ground heavy oil comprises performing reaction on a mixture under a condition which enables catalytic cracking to be performed on heavy components in the heavy oil. The catalytic viscosity reduction method for the ground heavy oil is characterized in that the mixture is formed by the heavy oil, catalyzer and water; the weight ratio of the heavy oil, the catalyzer and the water is 1 : 0.00004 to 0.01 : 0.02 to 1.5; the catalyzer contains one or more compounds of iron, cobalt, nickel, vanadium, molybdenum, manganese, copper and zinc; the reaction conditions comprise the temperature, the pressure and the time; the temperature is between 160 to 320 DEG C, the voltage is 0.4 to 6 MPa and the time is from 30 to 200 min. According to the catalytic viscosity reduction method for the ground heavy oil, viscosity reduction can be achieved without needing extra hydrogen donor or oxygen supply, good viscosity reduction effect is performed on crude oil with dynamic viscosity lower than 1000 mPa.s, the purpose of reducing the viscosity under a low temperature and pressure condition at a short time is achieved, the operation is convenient, and oil field practical application is suitable.

Description

technical field [0001] The invention relates to a method for catalyzing viscosity reduction of ground heavy oil. Background technique [0002] In the world's oil resources, the geological reserves of heavy oil far exceed the reserves of conventional crude oil. With the increasing demand for oil, the gradual reduction of conventional crude oil resources makes heavy oil have great development value. Heavy oil in the world's oil production production has gradually increased. However, the high content of colloid and asphaltene in heavy oil makes its viscosity and freezing point high, which makes it more difficult to extract and refine heavy oil. [0003] Due to the high viscosity of heavy oil, the fluidity of heavy oil becomes poor during production and gathering and transportation, the flow resistance increases, and the lifting of the wellbore and long-distance transportation of the tubing become very difficult. At present, the main production methods of heavy oil include ste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22
Inventor 陈锡荣黄凤兴张天宇张增丽许春梅
Owner CHINA PETROLEUM & CHEM CORP