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Preparation and application of heavy oil pyrolysis catalytic system

A catalytic system and thermal cracking technology, applied in the direction of mining fluids, drilling compositions, chemical instruments and methods, etc., can solve the problems of complex construction process, increased burden, and damage to crude oil quality, so as to facilitate on-site promotion and reduce mining costs. The effect of difficulty and simple operation process

Active Publication Date: 2016-03-30
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, this technology has gradually begun to be applied, and my country has also carried out large-scale tests in Liaohe Oilfield, Nanyang Oilfield and other places, but the core catalytic system in this technology is oil-soluble transition metal salts (such as nickel oleate, naphthenic acid, etc. Nickel, etc.), must first be injected into the formation through an oil-based slug, and then steam injected to heat and crack the heavy oil. The construction process is more complicated, and generally it needs to be around 250-300°C to effectively catalyze the heavy oil cracking
In addition, the addition of oil-soluble metal salts, especially nickel salts, will seriously damage the quality of crude oil and increase the burden on subsequent crude oil processing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The preparation of heavy oil thermal cracking catalytic system comprises the following steps:

[0015] The first step, under agitation, in the reaction kettle, the ratio of the amount of substances added is 1:1:1 of substituted phenolic compounds, formaldehyde solution, secondary amine and water of 5 times the quality of the above three compounds, and the substituted phenolic compounds The compound is 4-position phenol substituted with methyl, the formaldehyde solution is 35% formaldehyde solution aqueous solution of industrial grade, the secondary amine is diethanolamine of industrial grade, and the water is deionized water;

[0016] In the second step, under stirring, in the reaction kettle, drip a transition metal salt aqueous solution containing 20% ​​mass concentration and substituted phenol, etc., the transition metal salt is chemically pure and above, its cation is chromium ion, and the anion is Formate ion, water is deionized water;

[0017] The third step is t...

Embodiment 2

[0021] The preparation of heavy oil thermal cracking catalytic system comprises the following steps:

[0022] The first step, under agitation, in the reaction kettle, the ratio of the amount of substances added is substituted phenolic compounds, formaldehyde solution, secondary amine and water of 8 times the quality of the above three compounds. The substituted phenolic compounds The compound is 4-position phenol substituted with a methoxyl group, the formaldehyde solution is an industrial-grade 30% formaldehyde solution aqueous solution, the secondary amine is analytically pure diethanolamine, and the water is industrial tap water;

[0023] In the second step, under stirring, add dropwise an aqueous transition metal salt solution containing substituted phenol and other substances with a mass concentration of 10% in the reactor. The transition metal salt is chemically pure and above, and its cation is copper ion, and the anion is Sulfate ion, water is deionized water;

[0024...

Embodiment 3

[0028] The preparation of heavy oil thermal cracking catalytic system comprises the following steps:

[0029] In the first step, under stirring, the ratio of the amount of substances added to the reactor is 1:1.5:1.1 of substituted phenolic compounds, formaldehyde-containing compounds, secondary amines and water of 10 times the quality of the above three compounds. The phenolic compound is phenol substituted with an ethyl group at the 4-position, the formaldehyde-containing compound is industrial-grade paraformaldehyde, the secondary amine is industrial-grade piperazine, and the water is deionized water;

[0030] In the second step, under stirring, in the reaction kettle, dropwise add a transition metal salt solution with a mass concentration of 15% containing substances such as substituted phenols. The transition metal salt is chemically pure and above, and its cation is iron ion, and the anion is Chloride ion, water is distilled water;

[0031] The third step is to tighten ...

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PUM

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Abstract

The invention relates to preparation and application of a thermal cracking catalytic system of thickened oil. The preparation comprises the following steps: under stirring, adding a substituted phenolic compound, a formaldehyde containing compound or liquor, secondary amine and water into a reaction kettle; dropwise adding transitional metal salt aqueous liquor into the reaction kettle; tightening the reaction kettle and placing in a constant temperature oven; after reaction, cooling to room temperature; adding methanol and urea into the liquor to obtain the thermal cracking catalytic system of thickened oil. The application comprises the following steps: pre-diluting the catalytic system by reinjection water by adopting a high pressure pump; pre-injecting an oil reservoir; and then, injecting steam. The condensation point of the thickened oil can be reduced by over 10 DEG C, and the viscosity is reduced by over 70%. The application is simple in operational process, the exploring difficulty of the thickened oil is remarkably reduced, and thus site popularization is facilitated. The catalytic system is insoluble in crude oil and does not lead to increase of metal ion content in crude oil to aggravate the treatment difficulty in the crude oil processing process, so that the system has a remarkable effect of protecting the quality of crude oil.

Description

technical field [0001] The invention relates to the technical field of a catalytic system for catalyzing the degradation of heavy oil, in particular to the preparation and application of a thermal cracking catalytic system for heavy oil. Background technique [0002] my country is rich in heavy oil resources and widely distributed. More than 70 heavy oil fields have been discovered in 12 basins, and the estimated resources can reach 300×10 8 t above, accounting for about 15% of my country's total oil reserves. However, heavy oil has high viscosity and poor fluidity, and its exploitation is more difficult, costly and technically demanding. Commonly used methods for mining heavy oil include blending thin oil, hot water flooding, steam huff and puff and steam flooding, emulsification and viscosity reduction, heavy oil modification and viscosity reduction, etc. Among them, in-situ catalytic cracking / degradation modification of heavy oil has become a popular topic in China in re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/592E21B43/24
CPCC09K8/592E21B43/24
Inventor 顾雪凡薛丹陈刚张洁吴亚苏慧君
Owner XI'AN PETROLEUM UNIVERSITY
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