Pilot-scale supercritical water oxidation oil and hydrogen production method capable of realizing long-distance multi-stage heating of organic rock

Abstract

The invention belongs to the technical field of clean and efficient mining of deep unconventional or conventional resources and discloses a pilot-scale supercritical water oxidation oil and hydrogen production method capable of realizing long-distance multi-stage heating of organic rock. According to the method, organic rock blocks in a supercritical water-oxygen reaction kettle are heated through a multi-stage heating system, so step-by-step reaction, step-by-step control and step-by-step collection are formed, and long-distance reaction supercritical water oxidation oil and hydrogen production is achieved; in addition, the organic rock blocks are decomposed more sufficiently, oxygen injection and other measures are taken in the period, optimal oxygen injection parameters of supercritical water pyrolysis organic rock oil production and high-temperature residual carbon oxygenation hydrogen production are obtained, and the release characteristics of oil and gas products under different reaction distances are explained; and according to the invention, the oil-gas product quality under the combined action of parameters such as heat injection temperature, heat injection pressure and reaction distance can be systematically analyzed, and a theoretical basis is provided for field practice.

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 method for producing oil and hydrogen with supercritical water and oxygen for long-distance multi-stage heating of pilot-scale organic rocks. 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 a...

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 pipe, high temperature water vapor is injected from the wellhead into the ore layer to dissipate heat, which cannot guarantee efficient pyrolysis of deep reservoirs

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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