Method and system for establishing oil shale in-situ conversion temperature, time and conversion ratio plate

Abstract

The invention discloses a method and a system for establishing an oil shale in-situ conversion temperature, time and conversion ratio plate. The method comprises the following steps that: selecting anoil shale sample from an oil shale pseudoproduction area, and adopting a rock pyrolysis analyzer to perform an experiment on the oil shale sample; according to an experiment result, obtaining relational data among pyrolysis activation energy, a conversion ratio and a frequency factor; and on the basis of the relational data, establishing a relational plate between the reciprocal and the time logarithm of the oil shale in-situ conversion temperature when the conversion ratio is different numerical values. By use of the method, what temperature and when a certain conversion ratio degree can beachieved for the oil shale in-situ conversion in a mining zone can be quickly learnt, and an important parameter is provided for engineering decision and cost accounting.

Description

technical field [0001] The invention belongs to the field of oil shale exploitation and research, and in particular relates to a method and system for establishing an oil shale in-situ conversion temperature, time and conversion rate chart. Background technique [0002] Oil shale is a high-ash sedimentary rock containing combustible organic matter, and its organic matter is mainly kerogen / kerogen. In the absence of air or oxygen, the organic matter (kerogen / kerogen) in oil shale can be pyrolyzed to produce shale oil, dry distillation gas, solid carbonaceous residue and a small amount of pyrolysis water. The global oil shale resources are very rich. According to incomplete statistics, its reserves are about 10 trillion tons, which is more than 50% more than the traditional oil resources (271 billion tons). [0003] At present, there are two main methods of oil shale development: in-situ conversion mining and ground dry distillation. Ground dry distillation refers to the oil...

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Problems solved by technology

In addition to field test technologies, other in-situ mining technologies at the concept stage also try to use indoor physical simulation experiments to establish the quantitative relationship between oil shale temperature-time-conversion rate, although some information on temperature-time-conversion rate can be obtained , but the biggest problem with indoor physical simulation experiments is the simulation time scale. Unlike oil shale surface retorts, in-situ retort conversions must be achieved at relatively low temperatures by prolonging the heating time in order to reduce production costs, while indoor short-term experiments can only Only through high temperature can oil shale be transformed into oil and gas

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