Method of Microwave Heating Underground Oil Shale for Oil and Gas Exploitation and Simulation Experiment System

Abstract

The embodiment of the present invention provides a method for extracting oil and gas from underground oil shale by microwave heating and its simulation experiment system. , inject microwave strong absorption medium into the generated longitudinal fractures; carry out direct microwave radiation heating on the oil shale ore layer and the microwave strong absorption medium, and conduction heating of the microwave strong absorption medium with temperature increase to the oil shale The ore layer, and the generated oil and gas are exported through the transverse fractures. The method of the embodiment of the present invention utilizes microwave heating, and by making cracks in the oil shale bed, filling it with a microwave strong absorption medium, it can effectively improve the microwave absorption efficiency, make the oil shale bed heat up rapidly, and increase the oil and gas content of the oil shale. mining efficiency.

Description

technical field [0001] The invention relates to in-situ oil shale exploitation, in particular to a method for exploiting oil and gas from underground oil shale heated by microwaves and a simulation experiment system thereof. Background technique [0002] Oil shale is a low-permeability rock composed primarily of minerals and kerogen, the geological precursor to oil and natural gas. China is rich in oil shale resources. The resources buried between 0-500m are about 250 billion tons, and the oil shale resources between 500-1000m are 250 billion tons. Oil shale resources with a buried depth of less than 300m can be mined in the open pit and transported to a dry distillation plant to extract shale oil; oil shale with a buried depth of more than 300m can be converted into shale oil by heating the oil shale ore, and then used to produce shale oil. lead to the ground. The latter technology is still in the research and development stage and has not yet entered industrial productio...

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Problems solved by technology

The process is to use the convection heating method to heat the horizontal wellbore, and then use the high-temperature wellbore to heat the oil shale ore layer by heat conduction. The disadvantage of this method is the same as that of Shell’s electric heating rod heating method. slow heat rate problem

[0007] The third method of on-site dry distillation mining method is radiation heating. For example, Raytheon Company of the United States proposed to use microwaves to heat oil shale deposits. Since oil shale is a microwave weak absorption medium, there is also the problem of slow heating rate of oil shale.

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