System and working method for improving coalbed methane production rate by mixing hot air proppant

Abstract

The system for improving the production rate of coalbed methane by mixing hot air proppant includes a high-temperature and high-pressure hot air generating device, a proppant storage tank, a proppant delivery pump and a multi-stage mixing device. The air end is connected, the discharge end of the proppant storage tank is connected to the feed end of the proppant delivery pump, the discharge end of the proppant delivery pump is connected to the feed end of the multi-stage mixing device, and the mixture of the multi-stage mixing device is discharged The end is connected with the upper end of the coal seam well opened in the low coal rank reservoir. In the present invention, the hot air generated at high temperature and high pressure and the proppant are uniformly mixed three times and then injected into the coal seam well in the low coal rank reservoir to heat the coal seam to generate a large number of artificial cracks, which can improve the resolution rate of the coal bed gas. At the same time, the proppant Filling the cracks can prevent the cracks from closing due to stress release and increase the production of coalbed methane.

Description

technical field [0001] The invention relates to the technical field of coal bed methane exploitation, in particular to a system and a working method for increasing the production rate of coal bed methane by mixing hot air proppant. Background technique [0002] Coalbed methane is an unconventional natural gas associated with coal. Its main component is methane. It is an important clean energy source and a high-quality chemical raw material. Low-rank coalbed methane is the main target of coalbed methane development in the world. At present, the world has successfully realized large-scale coalbed methane Only the United States, Canada, Australia and China are the countries that develop and utilize them. Most of the coalbed methane production in the United States, Canada, and Australia comes from low-rank coalbed methane, while most of my country's coalbed methane production comes from the Qinshui Basin in Shanxi and the east of the Ordos Basin. Medium and high rank coalbed metha...

AI Technical Summary

Problems solved by technology

However, the traditional method of heating coal reservoirs by electricity and high-temperature superheated steam heating coal reservoirs consumes a lot of resources, costs are high, and the reasons for low economic efficiency are difficult to achieve industrialization and large-scale implementation and application.

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