Authigenic heat injection composition for underground catalytic oxidation of crude oil

A technology of catalytic oxidation and self-generating heat, applied in drilling compositions, chemical instruments and methods, production fluids, etc. problem, to achieve the effect of improving the mobility ratio and improving the sweep efficiency

Active Publication Date: 2014-07-02
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it also has the defect that the air and the catalyst cannot be injected synchronously, and the sweep efficiency of the air and the catalyst is low, which leads to a low recovery factor
[0011] It can be seen that in the prior art, there is no technology that can not only improve the air sweep efficiency but also realize the synchronous injection of air and catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment provides an injection composition for self-generating heat in the underground catalytic oxidation of crude oil, which is composed of sodium lauryl sulfate and sodium carboxymethylcellulose in the aqueous phase, aluminum oxide particles in the solid phase, and A three-phase stable dispersion system composed of air in the gas phase, including the following raw materials:

[0039] In terms of mass percentage, the content of sodium lauryl sulfate is 0.1% of the total weight of the aqueous mixture (composed of anionic surfactants in the aqueous phase, additives, nano-catalysts in the solid phase and water), carboxymethyl cellulose The content of sodium is 0.1% of the total weight of the mixture water liquid, the content of aluminum oxide particles with a particle size of 20nm is 0.1% of the total weight of the mixture water liquid, and the balance is water;

[0040] The volume ratio of the amount of air added to the water mixture is 3:1.

[0041] The injecti...

Embodiment 2

[0046] This embodiment provides a kind of injection composition for self-generating heat of crude oil underground catalytic oxidation, which composition is composed of sodium lauryl sulfate and sodium carboxymethylcellulose in aqueous phase, ruthenium tetroxide nanoparticles in solid phase and A three-phase stable dispersion system composed of air in the gas phase, including the following raw materials:

[0047] In terms of mass percentage, the content of sodium lauryl sulfate is 0.1% of the total weight of the aqueous mixture (composed of anionic surfactants in the aqueous phase, additives, nano-catalysts in the solid phase and water), carboxymethyl cellulose The content of sodium is 0.1% of the total weight of the mixture aqueous liquid, the content of ruthenium tetroxide nanoparticles with a particle diameter of 30nm is 0.1% of the total weight of the mixture aqueous liquid, and the remainder is water;

[0048] The volume ratio of the amount of air added to the water mixtur...

Embodiment 3

[0054] This embodiment provides an injection composition for self-generating heat in the underground catalytic oxidation of crude oil, which is composed of sodium lauryl sulfate and sodium carboxymethylcellulose in the aqueous phase, molybdenum trioxide nanoparticles in the solid phase, and A three-phase stable dispersion system composed of air in the gas phase, including the following raw materials:

[0055] In terms of mass percentage, the content of sodium lauryl sulfate is 0.1% of the total weight of the aqueous mixture (composed of anionic surfactants in the aqueous phase, additives, nano-catalysts in the solid phase and water), carboxymethyl cellulose The content of sodium is 0.1% of the total weight of the mixture aqueous liquid, the content of molybdenum trioxide nanoparticles with a particle diameter of 30nm is 0.3% of the total weight of the mixture aqueous liquid, and the balance is water;

[0056] The volume ratio of the amount of air added to the water mixture is ...

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Abstract

The invention provides an authigenic heat injection composition for underground catalytic oxidation of crude oil. The injection composition is a three-phase stable disperse system composed of water phase (anionic surfactant), an auxiliary agent, solid phase (nano-catalyst) and gas phase (air); the injection composition comprises the following raw materials: 0.1-1% of anionic surfactant taken as water phase, 0.1-1% of auxiliary agent, 0.1-1% of nano-catalyst taken as solid phase, and the balance of water, wherein the sum of the mass percent of the water phase, the auxiliary agent, the solid phase and the water is 100%; the volume ratio of the adding amount of the air to the total amount of the water phase, the auxiliary agent, the solid phase and the water is (3-7): 1. After the injection composition is adopted, the sweep efficiency of the air can be improved, the synchronous carrying of the catalyst and the air can be realized, and the problem of separation of underground air and catalyst can be avoided; the composition contains the efficient nanometer oxide catalyst, and the crude oil can be catalyzed to have oxidation reaction under the mild conditions, and therefore the problem that the stratum is blocked by coking caused by severe oxidation reaction is effectively avoided.

Description

technical field [0001] The invention relates to an injection composition used for self-generating heat of underground catalytic oxidation of crude oil, and belongs to the technical field of petroleum development. Background technique [0002] In the process of oilfield development, viscosity reduction of crude oil is one of the main technical approaches to enhance oil recovery. Heavy oil, ultra-heavy oil reservoirs and old oil fields that have undergone long-term water flooding are not easy to recover because of the characteristics of high polarity and high viscosity in the remaining oil, and the production cost will also increase. At this time, it is necessary to adopt viscosity reduction technology To achieve economical and effective mining. Currently available viscosity reduction mining technologies include: steam injection for viscosity reduction, thinning for viscosity reduction, emulsification for viscosity reduction, and air injection for viscosity reduction. As oil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/594E21B43/22
CPCC09K8/594E21B43/16
Inventor 黄佳昝成史琳魏飞黄超江航张强郝强升
Owner PETROCHINA CO LTD
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