Method and system for establishing oil shale in-situ conversion temperature, time and conversion rate chart

Abstract

The invention discloses a method and system for establishing an oil shale in-situ conversion temperature, time, and conversion rate chart. Experiments were carried out on oil shale samples; according to the experimental results, the relationship data between pyrolysis activation energy, conversion rate and frequency factor were obtained; based on the relationship data, the in-situ conversion temperature of oil shale was established when the conversion rate was different. Graph of the relationship between the reciprocal and the logarithm of time. This method can be used to quickly know at what temperature and when the in-situ conversion of oil shale in the production area reaches the conversion rate, which provides important parameters for engineering decision-making 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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