Pilot-scale organic rock long-distance multi-stage heating supercritical water-oxygen oil-to-hydrogen production system

Abstract

The invention belongs to the technical field of clean and efficient exploitation of deep unconventional or conventional resources, and discloses a pilot-scale organic rock long-distance multi-stage heating supercritical water-oxygen oil production and hydrogen production system, including a supercritical water generator, an organic rock ultra- Critical water pyrolysis reaction system, oxygen injection system, and oil and gas condensation and collection system; supercritical water generator mainly includes water injection system, front-stage preheating reaction system, secondary heating system and tertiary heating system; the reaction device can perform supercritical The pilot-scale simulation process of hydropyrolysis of organic rocks has realized multi-stage heating function, and the maximum reaction distance is more than 8m. It explains the release characteristics of oil and gas products under different reaction distances, and at the same time obtains the parameters of high-temperature residual carbon plus oxygen hydrogen production, which is completely simulated. The process of supercritical water-oxygen oil production and hydrogen production by long-distance multi-stage heating of organic rocks has been developed.

Description

technical field [0001] The invention belongs to the technical field of clean and efficient exploitation of deep unconventional or conventional resources, and specifically relates to a pilot-scale organic rock long-distance multi-stage heating supercritical water-oxygen oil production and hydrogen production system. It is used for the pilot-scale simulation process of supercritical water-oxygen pyrolysis of organic rocks, which can realize the functions and effects of in-situ oil and hydrogen production from organic rocks. Background technique [0002] At present, the mining method of organic rock deposits is mainly underground mining, but the environmental and ecological problems caused by underground mining are becoming more and more serious. Pollution of the atmosphere, the formation of mine fog and acid rain and other environmental problems; on the other hand, mining is likely to cause land subsidence, damage to ground buildings and structures, groundwater loss and pollut...

AI Technical Summary

Problems solved by technology

[0004] The existing Chinese patent CN 110965968 A in this field uses electric heating technology to heat oil shale, and then feeds nitrogen or other liquids to discharge oil and gas products formed by pyrolysis of oil shale; Chinese patent CN112727418 A, The process of high-temperature steam pyrolysis of oil shale and oil and gas collection is simulated; the existing problems in the prior art are: the reaction distance is short, and the simulated results are quite different from the actual site; the high-temperature residual carbon formed by oil shale pyrolysis cannot further utilization; and inability to achieve staged heating

For deep organic reservoirs, due to the long well pipes, the heat dissipation of high-temperature water vapor injected from the wellhead to the ore layer is serious, and the efficient pyrolysis of deep reservoirs cannot be guaranteed

The high-temperature residual carbon formed by the pyrolysis of oil shale cannot be further utilized. If oxygen injection is performed, the material of the reactor cannot meet the high-temperature conditions, so the oxygen injection function cannot be realized, and the in-situ hydrogen production process cannot be simulated.

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