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

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...

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 amount is difficult to accurately estimate, affected by the heterogeneity of the reservoir, and it is difficult to fully contact with the catalyst.