High-temperature and high-pressure three-dimensional physical simulation device for shale reservoir in-situ exploitation and experimental method

Abstract

The invention relates to a high-temperature and high-pressure three-dimensional physical simulation device for shale reservoir in-situ exploitation. The device comprises a power and medium transmission system, a steam generation and heating system, a pyrolytic reaction system, a product collection system and a temperature and pressure monitoring and adjusting system. The center of an oil shale sample is drilled, the hole is filled with ceramsite to simulate a heat injection well; symmetrical positions of four corners of the oil shale sample are drilled, and filled with ceramsite to simulate a production well. The one simulated heat injection well and four simulated production wells form a well network. The flowing property of steam injected by the simulated heat injection well is influenced by oil shale pores and cracks and is also influenced by a well pattern. Therefore, not only can the influence of the heterogeneity of the oil shale on the in-situ pyrolysis of the oil shale be researched, but also the influence of the well pattern on the pyrolysis of the oil shale can be researched. Therefore, the device and the method are closer to actual development of a mine field, and scientific, accurate and wide-applicability development rules can be better explored.

Description

technical field [0001] The invention belongs to the technical field of in-situ mining simulation of oil shale, and in particular relates to a high-temperature and high-pressure three-dimensional physical simulation device and an experimental method for in-situ mining of shale reservoirs. Background technique [0002] Oil shale is regarded as an alternative energy source for oil, with abundant reserves and good prospects for development and utilization. At present, my country is increasing investment in the development of oil shale. If industrial exploitation can be realized, the tense situation of energy in our country can be alleviated. [0003] At present, there are two types of technologies for oil shale development: ground carbonization technology and oil shale in-situ pyrolysis technology. Ground carbonization technology refers to: oil shale is mined to the ground, crushed to the required particle size, and then added to the carbonization furnace to obtain carbonizatio...

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Problems solved by technology

Existing in-situ pyrolysis models generally only have one injection end and one production end. The injection end is used to inject heat into the oil shale body, and the production end is used to collect pyrolysis products. This model can simply simulate the thermal degradation of oil shale. However, the oil shale has heterogeneity, and the general injection-production model cannot study the influence of heterogeneity on the in-situ pyrolysis of oil shale. Effect of in situ pyrolysis

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