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Cracking and catalytic viscosity reducer for heavy oil production by steam injection and preparation method thereof

A technology of cracking catalysis and steam injection, applied in chemical instruments and methods, drilling composition, etc., can solve problems such as difficulty in reaching

Active Publication Date: 2011-01-12
中国石油化工股份有限公司河南油田分公司石油工程技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the conventional crude oil cracking temperature, it is generally above 300°C, and it is difficult to reach this temperature in steam thermal recovery wells (around 200°C).

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In this example, 0.1 g of sodium hydroxide, 0.2 g of iron dodecylbenzenesulfonate, and 30 g of water are used. The specific preparation process is as follows: first dissolve sodium hydroxide with a small amount of water; Add the catalyst iron dodecylbenzenesulfonate, make up the remaining water, mix and stir for 4 hours to obtain the viscosity reducer of the present invention, add it to a high-temperature and high-pressure reactor containing 70g of heavy oil, and heat up to 200°C after sealing. ℃, keep the temperature for 24 hours, slowly lower the temperature to room temperature, pour out the crude oil, and measure the viscosity of the crude oil. The viscosity reduction rate is 99.3% as measured by experiments.

[0018] The catalyst ferric dodecylbenzenesulfonate in this example is prepared from dodecylbenzenesulfonic acid, ferric oxide and acetone at a constant temperature of 100°C for 4 hours, after filtering and distilling off the solvent , wherein, the weight perc...

Embodiment 2

[0020] In this example, 0.05 g of sodium hydroxide, 0.1 g of iron dodecylbenzenesulfonate, and 30 g of water are used. The specific preparation process is as follows: first dissolve sodium hydroxide with a small amount of water; Add the catalyst iron dodecylbenzene sulfonate, make up the remaining water, mix and stir for 3 hours, you can get the viscosity reducer of the present invention, add it to a high-temperature and high-pressure reactor containing 70g of heavy oil, heat up after sealing to 200°C, keep the temperature constant for 24 hours, slowly lower the temperature to room temperature, pour out the crude oil, and measure the viscosity of the crude oil. The viscosity reduction rate is 99.9% as measured by experiments.

[0021] The ferric dodecylbenzenesulfonate in this example is prepared by dodecylbenzenesulfonic acid, ferric oxide and acetone at a constant temperature of 110° C. for 3 hours, after filtering and distilling off the solvent. Wherein, the weight percent...

Embodiment 3

[0023] In this example, 0.15 g of sodium hydroxide, 0.15 g of iron dodecylbenzenesulfonate, and 30 g of water are used. The specific preparation process is as follows: first dissolve sodium hydroxide with a small amount of water; Add the catalyst iron dodecylbenzene sulfonate, make up the remaining water, mix and stir for 2 hours, you can get the viscosity reducer of the present invention, add it to a high-temperature and high-pressure reactor containing 70g of heavy oil, heat up after sealing to 200°C, keep the temperature constant for 24 hours, slowly lower the temperature to room temperature, pour out the crude oil, and measure the viscosity of the crude oil. The viscosity reduction rate is 99.9% as measured by experiments.

[0024] The ferric dodecylbenzenesulfonate in this example is prepared by dodecylbenzenesulfonic acid, ferric oxide and acetone at a constant temperature of 120°C for 2 hours, after filtering and distilling off the solvent. Wherein, the weight percenta...

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PUM

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Abstract

The invention relates to a catalytic cracking viscosity depressant for exploitating thick oil through steam injection and a preparation method thereof. The catalytic cracking viscosity depressant is suitable for catalytic visbreaking in a thick oil thermal production well when steam is injected to stratum; the catalytic cracking viscosity depressant is prepared by compounding the following compositions in weight percentage: 0.1 to 1.0 percent of ferric dodecyl benzene sulfonate, 0.1 to 1.0 percent of sodium hydroxide and the balance being water. The viscosity depressant and crude oil react for 16 hours at the temperature of 200 DEG C in order that the viscosity of the crude oil is reduced from 173,900 mPa.s to 400 Pa.s; and the visbreaking rate reaches over 99 percent. The catalytic cracking viscosity depressant is used to reduce the temperature of the reaction between a catalyst and the crude oil, has high visbreaking rate, is suitable for the visbreaking of the stratum of the oil well with high steam injection temperature and also has good effect under the condition of relatively low temperature.

Description

technical field [0001] The invention relates to a cracking catalytic viscosity reducer for steam injection mining of heavy oil. At the same time, the invention also relates to a preparation method of the cracking catalytic viscosity reducer for steam injection mining of heavy oil, which belongs to the field of petroleum exploitation. Background technique [0002] The methods of steam injection huff and puff or steam flooding are commonly used in the production of heavy oil. Although the method of injecting heat medium reduces the viscosity of crude oil and is beneficial to the production of heavy oil, but after a short period of production after steam injection, the formation temperature drops greatly, and the viscosity of heavy oil Therefore, in order to further improve the flowability of crude oil in the formation, it is often necessary to add chemical agents and other methods to reduce the viscosity of crude oil, thus prolonging the thermal recovery cycle time to a large e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/52
Inventor 赵长喜程红晓魏淋生姚奕明王晓东
Owner 中国石油化工股份有限公司河南油田分公司石油工程技术研究院
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