Alkyl ester sulphonate complex viscosity depressant with hydrogen supply structure and preparation method thereof

A technology of alkyl ester sulfonates and complexes, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problem that the optimal injection amount is not easy to accurately estimate, the influence of reservoir heterogeneity, and hydrogen supply To avoid problems such as large dosage of agent, to achieve good viscosity reduction effect and universality, good practical value, and the effect of improving quality

Inactive Publication Date: 2012-06-13
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, this technology has problems such as the large amount of hydrogen donor agent used, the optimal injection am

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing an alkyl ester sulfonate complex viscosity reducer with a hydrogen-donating structure, which comprises the following steps: adding 1.0 mol of lauryl alcohol (C12) and 5.0 mol of formic acid into a three-necked flask, and performing an esterification reaction at 70° C. 1.0h, then dissolved with 2.0mol dichloroethane, placed in an ice-water bath, stirred, and 1.3mol chlorosulfonic acid was added dropwise at a uniform speed for sulfonation reaction for 0.5h, after the sulfonation was completed, the temperature was raised to 70°C and aged for 1.0h to obtain an intermediate product ; Then add 0.12mol of iron powder into the above reaction system (intermediate product), carry out the complexation reaction at 100°C for 1.0h, after the reaction is over, let stand, separate layers, remove the water in the upper layer, dry at 60°C, the lower layer is waxy The product is an alkyl ester sulfonate complex viscosity reducer (product) with a hydrogen-donating str...

Embodiment 2

[0025] A preparation method of an alkyl ester sulfonate complex viscosity reducer with a hydrogen-donating structure, which comprises the following steps: adding 1.0 mol of myristyl alcohol (C14) and 6.0 mol of formic acid into a three-necked flask, and performing esterification at 80° C. React for 1.5 hours, then dissolve with 2.2mol dichloroethane, place in an ice-water bath, stir, add 1.5mol chlorosulfonic acid dropwise at a uniform speed for sulfonation reaction for 0.7h, heat up to 80°C for aging for 1.3h after sulfonation is completed; then Add 0.12mol iron powder into the above reaction system, carry out complexation reaction at 110°C for 1.3h, after the reaction, let stand and separate layers, remove the water in the upper layer, and dry at 60°C, the lower waxy substance is a hydrogen-donating structure. Alkyl ester sulfonate complex viscosity reducer (product). Industrial production can be scaled up with industrial-grade raw materials.

[0026] The resulting alkyl es...

Embodiment 3

[0030] A preparation method of an alkyl ester sulfonate complex viscosity reducer with a hydrogen-donating structure, which comprises the following steps: adding 1.0 mol of palmitic alcohol (C16) and 7.0 mol of formic acid into a three-necked flask, and performing an esterification reaction at 80° C. 2.0h, then dissolved with 2.4mol dichloroethane, placed in an ice-water bath, stirred, and 1.7mol chlorosulfonic acid was added dropwise at a uniform speed for sulfonation reaction for 0.8h, after the sulfonation was completed, the temperature was raised to 80°C for aging for 1.6h; mol iron powder was added to the above reaction system, and the complexation reaction was carried out at 120°C for 1.6h. Ester sulfonate complex viscosity reducer (product). Industrial production can be scaled up with industrial-grade raw materials.

[0031] The resulting alkyl ester sulfonate complex viscosity reducer with a hydrogen-donating structure has a chemical name of an alkyl ester sulfonate i...

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Abstract

The invention relates to a viscosity depressant for aquathermolysis viscosity-reducing exploitation of thick oil and a preparation method thereof. The preparation method for the alkyl ester sulphonate complex viscosity depressant with the hydrogen supply structure is characterized by comprising the following steps: 1), performing esterification reaction in the molar mass ratio of natural fatty alcohol to formic acid of 1 to (5.0 -8.0); 2), adding the natural fatty alcohol and ethylidene dichloride in the molar mass ratio of 1 to (2.0-2.5); 3), dropping chlorosulfonic acid in the molar mass ratio of the natural fatty alcohol to the chlorosulfonic acid of 1 to (1.3-1.8) to perform sulfonation reaction for 0.5-1h, and then aging the mixture; and 4), adding the natural fatty alcohol and transition metal in the molar mass ratio of 1 to 0.12 or 1 to 0.17 to an intermediate product to perform a complex reaction for 1-2h; stewing and layering the mixture to remove the water of upper layer, and drying the mixture to obtain lower wax which is the alkyl ester sulphonate complex viscosity depressant with the hydrogen supply structure. The viscosity depressant prepared by the method has good viscosity-reducing effects at 200 DEG C, and simultaneously has the characteristics of easily acquired materials, and a simple preparation process.

Description

technical field [0001] The invention relates to a viscosity reducer for heavy oil hydrothermal cracking viscosity reduction exploitation and a preparation method thereof. Background technique [0002] With the continuous reduction of conventional crude oil and the increasing demand for oil, heavy oil, as a kind of unconventional energy with huge reserves, has been paid more and more attention to its exploitation. my country is rich in heavy oil resources, and the proven and controlled reserves have reached 16×10 8 t, is the fourth largest producer of heavy oil in the world after the United States, Canada and Venezuela. However, due to the complex molecular structure of heavy oil and the high content of heavy components, resulting in high viscosity and freezing point, and difficult flow, it is difficult to effectively exploit it with existing mining technologies, especially the exploitation of ultra-heavy oil resources. Difficulty. [0003] So far, heavy oil recovery metho...

Claims

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Application Information

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IPC IPC(8): C09K8/592
Inventor 陈艳玲巢昆张县民刘华超李健
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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