Catalyst for injecting air into thick oil for oxidation and viscosity reduction

Abstract

The invention discloses a catalyst for injecting air into thick oil for oxidation and viscosity reduction, and belongs to the field of catalysts. The catalyst for injecting air into the thick oil for oxidation and viscosity reduction is prepared from 59.8%-70.2% of polymer carriers, 5.7%-8.3% of metal hydroxide, 9.7%-12.3% of metal potassium linoleate, 2.7%-5.3% of benzoic acid and 11.7%-14.3% of petroleum sulfonate. The catalyst for injecting air into the thick oil for oxidation and viscosity reduction has the advantages that the structure of the thick oil is improved, the viscosity of the oxidized thick oil is reduced, and therefore the oil recovery rate is increased through injecting air into the thick oil for catalytic oxidation.

Description

technical field [0001] The invention relates to a catalyst, in particular to a heavy oil air injection oxidation viscosity reducing catalyst. Background technique [0002] The distribution of heavy oil resources in my country is very extensive. More than 70 heavy oil fields have been discovered in 12 basins, and the estimated resources can reach more than 300×108t. With the reduction of light oil production reserves and the continuous improvement of oil production technology, the proportion of heavy oil production in the 21st century will continue to increase. For example, the production of high pour point oil and super heavy oil in Liaohe Oilfield have always accounted for a large proportion; Since 2000, Shengli Oilfield has an annual production capacity of thermally recovered heavy oil exceeding 140×104t, and 70% of the oil reserves discovered offshore are also heavy oil. Since heavy oil was exploited in the 1960s, heavy oil thermal recovery technologies such as steam huf...

AI Technical Summary

Problems solved by technology

The problem is that if the oxidation rate of crude oil is slow, oxygen breakthrough is likely to occur, leading to high oxygen content, which will cause safety problems. In addition, the viscosity of heavy oil usually increases after oxidation. Therefore, how to increase the oxidation rate of heavy oil and It is of great significance to improve the properties of oxidized heavy oil

The catalyst is composed of iron, cobalt, nickel, copper, zinc, molybdenum, chromium sulfate and chloride; iron, manganese, copper, zinc, nitrate and carbonate; cobalt, copper, zinc oxalate With acetate; cobalt, copper, zinc, manganese, iron benzoate; iron, manganese, copper, zinc phthalate and other metal salt catalysts with urea, sodium carbonate, sodium bicarbonate, ammonium bicarbonate , Ammonium Bicarbonate, Sodium Hydroxide, Potassium Hydroxide and other additives, the composite catalyst was tested with heavy oil at 150°C-250°C by air injection catalytic oxidation, and it was found that this type of catalyst can accelerate the oxygen consumption of heavy oil Speed, but there are problems such as serious increase in the viscosity of oxidized heavy oil after the reaction

Images