Method and device for exploiting aquo-complex through combination of pressure reducing technology and hydraulic fracturing technology

Abstract

The invention discloses a method and device for exploiting aquo-complex through the combination of the pressure reducing technology and the hydraulic fracturing technology. Double pitshaft sleeve tubular columns are designed. An outer pitshaft tubular column is used for exploiting natural gas aquo-complex from storage layers in the mode of reducing pressure and pumping gas. Various sensors are arranged at the bottom of an inner pitshaft tubular column and are used for detecting and monitoring conditions of the storage layers. Meanwhile, fracturing liquid is injected into the storage layers according to actual requirements, and manual hydraulic fracturing operation is conducted, so that the permeability of the storage layers is improved, and fluid smoothly flowing through channels and smooth conduction of pressure reduction and gas exploitation are ensured. The method comprises the steps of constructing an exploiting well, and arranging the double pitshaft sleeve tubular columns and relevant exploiting and monitoring devices; reducing pressure of natural gas aquo-complex and decomposing the natural gas aquo-complex; monitoring storage layer information, and utilizing the hydraulic fracturing technology to ensure the permeability of the storage layers; collecting and outputting natural gas and water. The method and device integrate the advantages of the pressure reducing technology and the advantages of the hydraulic fracturing technology, can be used for exploiting natural gas aquo-complex resources and can grasp and feed back storage layer change information at the same time so as to achieve the purpose of economic, efficient and safe commercial exploitation of natural gas aquo-complex resources.

Description

technical field [0001] The invention relates to a natural gas hydrate exploitation technology, in particular to a natural gas hydrate exploitation method and device combining depressurization and hydraulic fracturing technologies. Background technique [0002] The problem of insufficient energy supply in my country has become increasingly prominent, and with the sustained and rapid development of the national economy, this dependence on foreign oil and natural gas resources will continue to increase for a long period of time, and the international energy market prices will fluctuate frequently. And the challenges faced by energy transportation security will have a huge impact on the development of my country's national economy. Therefore, it has important practical needs and strategic significance to explore other new clean alternative energy sources, ensure my country's future energy supply and energy security, and ensure the healthy development of my country's economy and s...

AI Technical Summary

Problems solved by technology

[0005] So far, an economical and effective large-scale commercial exploitation of natural gas hydrate has not been formed, and it is difficult to achieve real commercial exploitation by using only one mining method in the known methods. The advantages of different methods must be combined to learn from each other. In order to achieve the purpose of economical, efficient and safe commercial exploitation of natural gas hydrate reservoirs, and benefit mankind

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