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Crude oil recovery and transportation method

A crude oil and heavy oil technology, which is applied in the field of crude oil production and transportation, can solve problems such as long reaction time and difficult implementation, achieve convenient operation, solve the scarcity of thin oil sources, and have good effects of catalytic viscosity reduction

Active Publication Date: 2013-10-30
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

[0034] (1) 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 the reaction The mixture was heated to 160°C, the reaction pressure was kept at 6MPa, and the reaction was stirred for 200min. The measured dynamic viscosity of the product oil after the reaction was degassed and dehydrated at 50°C was 1232mPa·s;

[0035] (2) Raise the temperature of the reactor to 320°C, and collect light fractions with a distillation range below 300°C (the dynamic viscosity after degassing and dehydration at 50°C is 38.2mPa·s) as a distillate for heavy oil production. Mix thin oil, inject it in the oil well, extract the crude oil in the oil well, and use the crude oil as the heavy oil of step (1);

[0036] (3) Transfer the residual oil at the bottom of the tank (the dynamic viscosity after degassing and dehydration at 50°C is 1532m...

Embodiment 2

[0038] (1) 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 the reaction The mixture was heated to 320°C, the reaction pressure was kept at 0.4MPa, and the reaction was stirred for 30 minutes. The measured kinetic viscosity of the product oil after degassing and dehydration at 50°C was 1271mPa·s;

[0039] (2) Raise the temperature of the reactor to 320°C, and collect the light fraction with a distillation range below 300°C (the dynamic viscosity after degassing and dehydration at 50°C is 37.5mPa·s) as a distillate for heavy oil production. Mix thin oil, inject it in the oil well, extract the crude oil in the oil well, and use the crude oil as the heavy oil of step (1);

[0040] (3) Transfer the residual oil at the bottom of the tank (the dynamic viscosity after degassing and dehydration at 50°C is 1560mPa·s) to ...

Embodiment 3

[0042] (1) First add 0.25g ferrous sulfate, 0.12g vanadyl sulfate and 0.13g molybdenum sulfate catalyst into 28.8g deionized water, then the mixture and 120.1g heavy oil (the dynamic viscosity after degassing and dehydration at 50°C is 3470mPa·s) into a 300mL reactor, heated the reactant to 265°C, kept the reaction pressure at 4MPa, and stirred for 100min. ;

[0043] (2) Raise the temperature of the reactor to 320°C, and collect the light distillate with a distillation range below 300°C (the dynamic viscosity after degassing and dehydration at 50°C is 7.5mPa·s) as a distillate for heavy oil production. Mix thin oil, inject it in the oil well, extract the crude oil in the oil well, and use the crude oil as the heavy oil of step (1);

[0044] (3) Transfer the residual oil at the bottom of the tank (the dynamic viscosity after degassing and dehydration at 50°C is 460mPa·s) to the export pipeline.

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Abstract

The invention discloses a crude oil recovery and transportation method. The method comprises placing a mixture in a condition which enables the heavy components of heavy oil to be under catalytic cracking for reaction, wherein the mixture is composed of the heavy oil, catalysts and water which have a weight ratio of 1: (0.00004-0.01): (0.02-1.5); dividing reaction products into a part A and a part B, wherein the part A serves as blending diluting oil to be injected into an oil well to recover the crude oil in the oil well, and the part B is input into an output pipe. According to the crude oil recovery and transportation method, the viscosity of the heavy oil can be reduced without additional hydrogen donors or oxygen donors and the catalytic viscosity reduction effects are good to facilitate the recovery and transportation of the heavy oil; meanwhile, the aim of preparing the blending diluting oil in a short time and at a low temperature and a low pressure can be achieved without any other additives. Therefore, the problem of thin oil scarcity of certain oil fields can be solved, and operation convenience and oil field practical application can be achieved.

Description

technical field [0001] The invention relates to a crude oil recovery and transportation method, in particular to a method of catalytically cracking heavy oil as blended oil or gathering and transportation. 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 tu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/241
Inventor 陈锡荣张增丽许春梅张天宇黄凤兴
Owner CHINA PETROLEUM & CHEM CORP
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