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Chemical Auxiliary Ignition Agent and Ignition Method for Low Temperature Heavy Oil Reservoir

A technology for heavy oil reservoirs and ignition agents, which is applied in ignition agents, earth-moving drilling, explosives, etc., can solve the problems of gas channeling, increased ignition difficulty, low reaction efficiency of oxygen and crude oil, etc., and can increase the pressure , Improve the success rate of ignition and reduce the effect of coking belt

Active Publication Date: 2021-12-07
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Conventional chemical ignition technology generally uses steam preheating. The high water content of the heated formation increases the difficulty of ignition. At the same time, there are problems such as low reaction efficiency between oxygen and crude oil and gas channeling. Therefore, it is necessary to develop a stable, active, environmentally friendly and reliable ignition agent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The chemical auxiliary ignition agent for low-temperature heavy oil reservoirs in this embodiment includes a reducing agent component, an oxidizing agent component and a catalyst component; in terms of mass percentage, the amount of the reducing agent component is 55%, the amount of the oxidant component is 10%, and the catalyst component is The dosage of components is 25%, and the dosage of other components is 10%;

[0031] The reducing agent component is a mixture of non-metallic elemental carbon, metal magnesium, aluminum, boron oxide and iron powder, with a mass ratio of 4:7:5:2:1.5.

[0032] The oxidant component is a mixture of potassium permanganate and sodium nitrate with a mass ratio of 3:1.

[0033] The catalyst component is a mixture of nickel naphthenate and cobalt naphthenate with a mass ratio of 2:1.

[0034] Other components are a mixture of calcium sulfonate, n-butanol, cumene and nitrate ethyl nitramine, with a mass ratio of 4:10:5:3.

[0035] Based o...

Embodiment 2

[0042] The chemical auxiliary ignition agent for low-temperature heavy oil reservoirs in this embodiment includes reducing agent components, oxidizing agent components and catalyst components; in terms of mass percentage, the amount of reducing agent components is 50%, the amount of oxidizing agent components is 15%, and the catalyst components are The dosage of components is 20%, and the dosage of other components is 15%;

[0043] The reducing agent component is a mixture of non-metal elemental carbon, metal magnesium, aluminum or their oxides, boron oxide, ferrocene or iron oxides, and the mass ratio is 4:7:5:2:1.5.

[0044] The oxidant component is a mixture of potassium chlorate and sodium nitrate with a mass ratio of 3:1.

[0045]The catalyst component is a mixture of nickel chloride and cobalt chloride with a mass ratio of 2:1.

[0046] Other components are a mixture of calcium sulfonate, n-butanol, cumene, and nitrate ethyl nitramine, and the mass ratio is 5:8:7:4.

...

Embodiment 3

[0054] The chemical auxiliary ignition agent for low-temperature heavy oil reservoirs in this embodiment includes reducing agent components, oxidizing agent components and catalyst components; in terms of mass percentage, the amount of reducing agent components is 58%, the amount of oxidizing agent components is 12%, and the catalyst components are The consumption of components is 22%, and the consumption of other components is 8%;

[0055] The reducing agent component is a mixture of non-metal elemental carbon, metal magnesium, aluminum, boron and ferrocene, and the mass ratio is 4:7:5:2:1.5.

[0056] The oxidant component is a mixture of potassium permanganate and sodium nitrate with a mass ratio of 3:1.

[0057] The catalyst component is a mixture of nickel naphthenate and cobalt chloride with a mass ratio of 2:1.

[0058] Other ingredients are a mixture of calcium sulfonate, n-butanol, cumene, and nitrate ethyl nitramine, and the mass ratio is 4:10:5:3.

[0059] Based on...

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Abstract

Chemical auxiliary ignition agent and ignition method for low-temperature heavy oil reservoirs. The components of chemical auxiliary ignition agents for low-temperature heavy oil reservoirs include reducing agent components, oxidant components, catalyst components and other components; in terms of mass percentage, reducing agent The consumption of components is 50-65%, the consumption of oxidant components is 10-15%, the consumption of catalyst components is 20-35%, and the consumption of other components is 5-15%. In the method of burning oil reservoirs in oil reservoirs, adding a reducing agent can increase the combustible components and provide initial ignition energy; adding an oxidizing agent can strengthen combustion and speed up the redox reaction; adding a catalyst can reduce the activation energy of the oxidation reaction and accelerate consumption. The oxygen rate also changes the deposition of fuel and reduces the coking zone, and the three work together to accelerate the transition from low-temperature oxidation to high-temperature oxidation and achieve ignition.

Description

technical field [0001] The invention belongs to the technical field of oil recovery of low-temperature heavy oil reservoirs, and is aimed at the exploitation of heavy oil and low-temperature heavy oil reservoirs, and in particular relates to a chemical auxiliary ignition agent and an ignition method for low-temperature heavy oil reservoirs. Background technique [0002] Combustion of oil formations is the most efficient method of thermal recovery. Its main application is the extraction of viscous heavy oil. The world's total oil resources are the majority. Under the premise of increasing global energy demand and the decreasing availability of conventional or easy-to-produce crude oil, heavy crude oil, which accounts for about 70% of the world's total oil reserves, will play an important role in the future of the oil industry. play an increasingly important role. The process of burning the oil layer is to inject oxygen into the oil reservoir to oxidize the crude oil. The he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06C15/00C06B33/14E21B43/243
CPCC06B33/14C06C15/00E21B43/243
Inventor 王波贺康李吉鹏任海兵
Owner XI'AN PETROLEUM UNIVERSITY
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