Preparation method of thickened oil viscosity reducer with dual structure of hydrogen donor and catalytic center

Abstract

The invention relates to a preparation method of aquathermolysis catalysis viscosity reducer for thickened oil recovery, in particular to a preparation method of thickened oil viscosity reducer with a dual structure of hydrogen donor and catalytic center, which is characterized by comprising the following steps: (1) selecting the following raw materials in parts by weight: 17-19 parts of p-toluenesulfonic acid, 4-5 parts of cupric oxide powder and 40-60 parts of water; and (2) dissolving the p-toluenesulfonic acid in the water, heating to 40-60 DEG C, adding the cupric oxide powder, stirring for 0.5-1 hour at the temperature of 80-90 DEG C, filtering while hot, putting filtrate in an oven for drying at the temperature of 50-70 DEG C for 10-12 hours, and obtaining the thickened oil viscosity reducer with the dual structure of hydrogen donor and catalytic center. The viscosity reducer prepared by the method has favorable viscosity reducing effect at the temperature below 200 DEG C, and the preparation process is simple.

Description

technical field [0001] The invention relates to a preparation method of a hydrothermal cracking catalytic viscosity reducer used in heavy oil exploitation. Background technique [0002] Heavy oil is an important part of global petroleum resources, and has resource potential several times higher than conventional petroleum resources. Heavy oil accounts for more than 70% of the world's remaining petroleum resources. With the continuous development of the global economy, countries around the world are increasingly demanding oil. Considering the current situation of conventional crude oil exploitation and heavy oil reserves, it can be predicted that heavy oil will occupy an extremely important position in the future national energy strategy. [0003] The hydrothermal cracking catalytic viscosity reduction technology for heavy oil recovery is to inject steam into the oil layer, add hydrothermal cracking catalytic viscosity reducer, use the oil layer as a natural reactor, and use ...

AI Technical Summary

Problems solved by technology

The key to this technology is the development of hydrothermal cracking catalytic viscosity reducer, but the hydrothermal cracking catalytic viscosity reducer currently reported generally has the problem of poor universality

Scholars at home and abroad have found that for some heavy oils that are not effective in reducing viscosity by using hydrothermal cracking catalytic viscosity reducing agents alone, adding some hydrogen donors (such as toluene, formic acid, tetrahydronaphthalene, etc.) They believe that the hydrogen donor and the catalytic viscosity reducer have a synergistic effect on the aquathermolysis reaction of heavy oil, but in the field application, the combined use of the hydrogen donor and the catalytic viscosity reducer will bring more problems to the construction equipment and process. Certain difficulties will also increase economic costs, and it is difficult to meet the needs of on-site mining