Underground composite heater for in-situ development of underground mineral products

Abstract

An underground composite heater for in-situ development of underground mineral products belongs to the field of underground heating exploitation of unconventional oil and gas resources and comprises a gas injection pipe, a cable, a cable bin, an electric heating rod, a baffle plate, a heater upper pipe body, a heater lower pipe body and porous foamed aluminum. A baffle plate vent hole is formed in the baffle plate, a second air outlet is formed in the bottom of the heater upper pipe body, a third air outlet is formed in the bottom of the heater lower pipe body, and the first air outlet, the electric heating rod, the baffle plate, the heater upper pipe body, the baffle plate vent hole and the second air outlet jointly form an electric heating part. The lower pipe body of the heater, the porous foamed aluminum loaded with the catalysts platinum, rhodium and palladium and the third gas outlet form a combustion heating part, the two functions of electric heating and combustion heating are integrated into the functions of one heater, and the exploitation requirements of different types of unconventional oil and gas resources such as oil shale, thickened oil, tight oil and natural gas hydrates can be met.

Description

technical field [0001] The invention relates to an underground composite heater for in-situ development of underground minerals, which is suitable for underground heating and exploitation of unconventional oil and gas resources such as oil shale, heavy oil, tight oil and natural gas hydrate. Background technique [0002] Unconventional oil and gas resources such as oil shale, heavy oil, tight oil and natural gas hydrate are important strategic resources, and countries around the world have vigorously carried out relevant research in order to achieve breakthroughs in the field of unconventional oil and gas resource extraction. The exploitation of unconventional oil and gas resources such as oil shale, heavy oil, tight oil and natural gas hydrate is considered to be the most effective method by in-situ heating downhole. The key to the regulation of oil and gas resource extraction. [0003] At present, there are two main heating methods for downhole heaters. One is electric he...

AI Technical Summary

Problems solved by technology

However, since the combustion gas is mainly hydrocarbon gas, the supporting gas is mainly air or oxygen; therefore, the main components of the high-temperature tail gas produced by combustion are high-temperature water vapor and carbon dioxide; due to the different physical properties of unconventional oil and gas resources, the , it is necessary to select different injection gases; taking oil shale as an example, chemical reactions need to occur in the process of oil shale thermal recovery, and different types of gases will affect the cracking behavior of organic matter inside oil shale, and will also affect the product composition, so it is necessary to Select injection gas according to the nature of the formation; combustion and heating can only inject high-temperature water vapor and carbon dioxide into the formation, which cannot be applied to a wider range of formations; therefore, the application range is narrow and cannot meet the needs of different types of unconventional oil and gas resources. Require

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